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diff --git a/CMakeLists.txt b/CMakeLists.txt
index fd749c3..4609bd7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,154 +1,154 @@
cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
set(CMAKE_LEGACY_CYGWIN_WIN32 0)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
project("Reversed HEJ" C CXX)
## Flags for the compiler. No warning allowed.
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
set(warnings "-Wall -Wextra -Werror -std=c++1y")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
set(warnings "-Wall -Wextra -Werror -std=c++11")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
set(warnings "/W4 /WX /EHsc")
endif()
if (NOT CONFIGURED_ONCE)
set(CMAKE_CXX_FLAGS "${warnings}"
CACHE STRING "Flags used by the compiler during all build types." FORCE)
set(CMAKE_C_FLAGS "${warnings}"
CACHE STRING "Flags used by the compiler during all build types." FORCE)
endif()
## Add directories and find dependences
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
find_package(fastjet REQUIRED)
find_package(clhep REQUIRED)
find_package(lhapdf REQUIRED)
find_package(gsl REQUIRED)
find_package(Boost REQUIRED COMPONENTS iostreams)
find_package(HepMC 3)
if(${HepMC_FOUND})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DRHEJ_BUILD_WITH_HepMC")
endif()
find_library(LOOPTOOLS_LIBRARIES ooptools)
if(${LOOPTOOLS_LIBRARIES} STREQUAL "LOOPTOOLS_LIBRARIES-NOTFOUND")
message("-- Could NOT find looptools")
set(LOOPTOOLS_FOUND 0)
else()
message("-- Found looptools: ${LOOPTOOLS_LIBRARIES}")
set(LOOPTOOLS_FOUND 1)
endif()
if(${LOOPTOOLS_FOUND})
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DUSE_LT")
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DRHEJ_BUILD_WITH_LT")
endif()
include_directories(SYSTEM ${lhapdf_INCLUDE_PATH})
include_directories(SYSTEM ${fastjet_INCLUDE_PATH})
include_directories(SYSTEM ${clhep_INCLUDE_PATH})
include_directories(SYSTEM ${gsl_INCLUDE_PATH})
add_subdirectory(src)
## define executable
add_executable(rHEJ src/main.cc)
## link libraries
target_link_libraries(rHEJ rhej)
#plugins
add_subdirectory("analysis-plugins")
file(GLOB rhej_headers ${CMAKE_CURRENT_SOURCE_DIR}/include/RHEJ/*.hh)
install(FILES ${rhej_headers} DESTINATION include/RHEJ/)
install(TARGETS rHEJ DESTINATION bin)
enable_testing()
set(tst_dir "${CMAKE_CURRENT_SOURCE_DIR}/t")
add_executable(test_Matrix ${tst_dir}/test_Matrix.cc)
add_executable(test_classify ${tst_dir}/test_classify.cc)
add_executable(test_psp ${tst_dir}/test_psp.cc)
add_executable(test_ME_h_3j ${tst_dir}/test_ME_h_3j.cc)
add_executable(test_ME_hjets_mt174 ${tst_dir}/test_ME_hjets_mt174.cc)
add_executable(check_res ${tst_dir}/check_res.cc)
add_executable(check_lhe ${tst_dir}/check_lhe.cc)
target_link_libraries(test_Matrix rhej)
target_link_libraries(test_classify rhej)
target_link_libraries(test_psp rhej)
target_link_libraries(test_ME_h_3j rhej)
target_link_libraries(test_ME_hjets_mt174 rhej)
target_link_libraries(check_res rhej)
target_link_libraries(check_lhe rhej)
add_test(
NAME t_matrix
COMMAND test_Matrix
)
add_test(
NAME t_classify
COMMAND test_classify ${tst_dir}/classify.lhe.gz
)
add_test(
NAME t_psp
COMMAND test_psp ${tst_dir}/psp_gen.lhe.gz
)
add_test(
NAME t_ME
COMMAND test_ME_h_3j
)
if(${LOOPTOOLS_FOUND})
add_test(
NAME t_ME_mt174
COMMAND test_ME_hjets_mt174
)
endif()
add_test(
NAME t_2j
COMMAND check_res ${tst_dir}/2j.lhe.gz 3.382e7 752159
)
add_test(
NAME t_3j
COMMAND check_res ${tst_dir}/3j.lhe.gz 2.418e6 67247.8
)
add_test(
NAME t_4j
COMMAND check_res ${tst_dir}/4j.lhe.gz 551096 30572.5
)
add_test(
NAME t_h_3j
COMMAND check_res ${tst_dir}/h_3j.lhe.gz 0.793107 0.0479054
)
add_test(
NAME t_h_3j_uno
COMMAND check_res ${tst_dir}/h_3j_uno.lhe.gz 0.0246366 0.001 uno
)
if(${HepMC_FOUND})
file(READ "${tst_dir}/jet_config.yml" config)
file(WRITE "${tst_dir}/jet_config_withHepMC.yml" "${config} - tst.hepmc3")
add_executable(check_hepmc ${tst_dir}/check_hepmc.cc)
target_link_libraries(check_hepmc rhej)
add_test(
NAME t_main
COMMAND rHEJ ${tst_dir}/jet_config_withHepMC.yml ${tst_dir}/2j.lhe.gz
)
add_test(
NAME t_hepmc
COMMAND check_hepmc tst.hepmc3
)
else()
add_test(
NAME t_main
COMMAND rHEJ ${tst_dir}/jet_config.yml ${tst_dir}/2j.lhe.gz
)
endif()
add_test(
NAME t_lhe
COMMAND check_lhe tst.lhe
)
set(CONFIGURED_ONCE TRUE CACHE INTERNAL
"A flag showing that CMake has configured at least once.")
diff --git a/src/Currents.cc b/src/Currents.cc
index dcaf065..65cce58 100644
--- a/src/Currents.cc
+++ b/src/Currents.cc
@@ -1,3955 +1,3955 @@
//////////////////////////////////////////////////
//////////////////////////////////////////////////
// This source code is Copyright (2012) of //
// Jeppe R. Andersen and Jennifer M. Smillie //
// and is distributed under the //
// Gnu Public License version 2 //
// http://www.gnu.org/licenses/gpl-2.0.html //
// You are allowed to distribute and alter the //
// source under the conditions of the GPLv2 //
// as long as this copyright notice //
// is unaltered and distributed with the source //
// Any use should comply with the //
// MCNET GUIDELINES //
// for Event Generator Authors and Users //
// as distributed with this source code //
//////////////////////////////////////////////////
//////////////////////////////////////////////////
#include "RHEJ/currents.hh"
//#include "ZJets/Flags.h"
#include "RHEJ/utility.hh"
#include <gsl/gsl_sf_dilog.h>
const COM looprwfactor = (COM(0.,1.)*M_PI*M_PI)/pow((2.*M_PI),4);
//const double HVE = 246.21845810181637;
// Loop integrals
-#ifdef USE_LT
+#ifdef RHEJ_BUILD_WITH_LT
#include "clooptools.h"
namespace{
bool init_looptools(){
ltini();
return true;
}
const bool looptools_initialised = init_looptools();
}
COM B0DD(CLHEP::HepLorentzVector q, double mq)
{
return B0(q.m2(), mq*mq, mq*mq);
}
COM C0DD(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mq)
{
return C0(q1.m2(), q2.m2(), (q1+q2).m2(), mq*mq,mq*mq,mq*mq);
}
COM D0DD(CLHEP::HepLorentzVector q1,CLHEP::HepLorentzVector q2, CLHEP::HepLorentzVector q3, double mq)
{
return D0(q1.m2(),q2.m2(),q3.m2(),(q1+q2+q3).m2(),(q1+q2).m2(),(q2+q3).m2(),mq*mq,mq*mq,mq*mq,mq*mq);
}
#endif
COM B0an(double q2, double mt)
// This is the bubble integral as given in Eq. (A.4) of VDD
{
COM ans(COM(0.,0.));
double mt2;
//std::cerr<<"mt in B0an = "<<mt<<std::endl;
mt2=mt*mt;
if(q2>0&&q2<4*mt2) {
ans=-1./8/M_PI/M_PI*sqrt((4*mt2-q2)/q2)*atan(sqrt(q2/(4*mt2-q2)));
}
else if (q2<=0||q2>=4*mt2) {
ans=-1./16/M_PI/M_PI*sqrt((q2-4*mt2)/q2)*log(COM(1.+sqrt(q2/(q2-4*mt2)))/(1.-sqrt(q2/(q2-4*mt2))));
}
else {
std::cout << "Error in B0an!"<<std::endl;
}
if (std::isnan(ans.real())) {
std::cout <<" Ouch!\n";
}
return ans;
}
COM C0an(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt)
// This is the triangle integral, as given in Eq. (A.4) of VDD
{
CLHEP::HepLorentzVector Q;
double Delta3,mt2;
double xm,ym,xp,yp;
COM zm,zp;
double delta1,delta2,delta3;
double delta1p,delta2p,delta3p,delta1m,delta2m,delta3m;
double q12,q22,Q2;
double ans(0.),ansim(0.),norm;
double mod, theta;
gsl_sf_result res_re,res_im;
if (mt < 0.)
std::cerr<<"Problem in C0an! mt = "<<mt<<std::endl;
mt2=mt*mt;
Q=-q1-q2; // Define all momenta ingoing as in appendix of VDD
q12=q1.m2();
q22=q2.m2();
Q2=Q.m2();
Delta3=q12*q12+q22*q22+Q2*Q2-2*q12*q22-2*q12*Q2-2*q22*Q2;
delta1=(q12-q22-Q2)/sqrt(Delta3);
delta2=(-q12+q22-Q2)/sqrt(Delta3);
delta3=(-q12-q22+Q2)/sqrt(Delta3);
delta1p=(1.+delta1)/2.;
delta2p=(1.+delta2)/2.;
delta3p=(1.+delta3)/2.;
delta1m=(1.-delta1)/2.;
delta2m=(1.-delta2)/2.;
delta3m=(1.-delta3)/2.;
xp=q22/2/mt2*(1.+sqrt(1.-4*mt2/q22));
xm=q22/2/mt2*(1.-sqrt(1.-4*mt2/q22));
yp=q12/2/mt2*(1.+sqrt(1.-4*mt2/q12));
ym=q12/2/mt2*(1.-sqrt(1.-4*mt2/q12));
zp=Q2/2/mt2*(1.+sqrt(COM(1.-4.*mt2/Q2)));
zm=Q2/2/mt2*(1.-sqrt(COM(1.-4.*mt2/Q2)));
norm=1./16./M_PI/M_PI/sqrt(Delta3);
// Add logs and dilogs of real argument:
ans=log(1-ym)*log((1-ym*delta1p)/(1-ym*delta1m))+log(1-xm)*log((1-xm*delta2p)/(1-xm*delta2m));
ans=ans+gsl_sf_dilog(yp*delta1p)+gsl_sf_dilog(ym*delta1p)-gsl_sf_dilog(yp*delta1m)-gsl_sf_dilog(ym*delta1m);
ans=ans+gsl_sf_dilog(xp*delta2p)+gsl_sf_dilog(xm*delta2p)-gsl_sf_dilog(xp*delta2m)-gsl_sf_dilog(xm*delta2m);
// Add logs of complex argument:
ans=ans+real(log(1.-zm)*log((1.-zm*delta3p)/(1.-zm*delta3m)));
ansim=ansim+imag(log(1.-zm)*log((1.-zm*delta3p)/(1.-zm*delta3m)));
// Add dilogs of complex argument:
mod=abs(zp*delta3p);
theta=arg(zp*delta3p);
gsl_sf_complex_dilog_e(mod,theta,&res_re,&res_im);
ans=ans+res_re.val;
ansim=ansim+res_im.val;
mod=abs(zm*delta3p);
theta=arg(zm*delta3p);
gsl_sf_complex_dilog_e(mod,theta,&res_re,&res_im);
ans=ans+res_re.val;
ansim=ansim+res_im.val;
mod=abs(zp*delta3m);
theta=arg(zp*delta3m);
gsl_sf_complex_dilog_e(mod,theta,&res_re,&res_im);
ans=ans-res_re.val;
ansim=ansim-res_im.val;
mod=abs(zm*delta3m);
theta=arg(zm*delta3m);
gsl_sf_complex_dilog_e(mod,theta,&res_re,&res_im);
ans=ans-res_re.val;
ansim=ansim-res_im.val;
ans=ans*norm;
ansim=ansim*norm;
// std::cout << "C0an : "<<ans<<std::endl;
return COM(ans,ansim);
}
COM A1(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt)
// As given in Eq. (B.2) of VDD
{
double q12,q22,Q2;
CLHEP::HepLorentzVector Q;
double Delta3,mt2;
COM ans(COM(0.,0.));
q12=q1.m2();
q22=q2.m2();
Q=-q1-q2; // Define all momenta ingoing as in appendix of VDD
Q2=Q.m2();
// std::cout<<"Higgs mass? : "<<sqrt(Q2)<<std::endl;
Delta3=q12*q12+q22*q22+Q2*Q2-2*q12*q22-2*q12*Q2-2*q22*Q2;
if (mt < 0.)
std::cerr<<"Problem in A1! mt = "<<mt<<std::endl;
mt2=mt*mt;
- #ifdef USE_LT
+ #ifdef RHEJ_BUILD_WITH_LT
ans=looprwfactor*COM(0,-1)*C0DD(q1,q2,mt)*(4.*mt2/Delta3*(Q2-q12-q22)-1.-4.*q12*q22/Delta3-12.*q12*q22*Q2/Delta3/Delta3*(q12+q22-Q2));
ans=ans-looprwfactor*COM(0,-1)*(B0DD(q2,mt)-B0DD(Q,mt))*(2.*q22/Delta3+12.*q12*q22/Delta3/Delta3*(q22-q12+Q2));
ans=ans-looprwfactor*COM(0,-1)*(B0DD(q1,mt)-B0DD(Q,mt))*(2.*q12/Delta3+12.*q12*q22/Delta3/Delta3*(q12-q22+Q2));
#else
ans=C0an(q1,q2,mt)*(4.*mt2/Delta3*(Q2-q12-q22)-1.-4.*q12*q22/Delta3-12.*q12*q22*Q2/Delta3/Delta3*(q12+q22-Q2));
ans=ans-(B0an(q22,mt)-B0an(Q2,mt))*(2.*q22/Delta3+12.*q12*q22/Delta3/Delta3*(q22-q12+Q2));
ans=ans-(B0an(q12,mt)-B0an(Q2,mt))*(2.*q12/Delta3+12.*q12*q22/Delta3/Delta3*(q12-q22+Q2));
#endif
ans=ans-2./Delta3/16/M_PI/M_PI*(q12+q22-Q2);
//cout << "q12, q22= "<<q12<<" "<<q22<<" "<<endl;
return ans;
}
COM A2(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt)
// As given in Eq. (B.2) of VDD, but with high energy limit
// of invariants taken.
{
double q12,q22,Q2;
CLHEP::HepLorentzVector Q;
double Delta3,mt2;
COM ans(COM(0.,0.));
if (mt < 0.)
std::cerr<<"Problem in A2! mt = "<<mt<<std::endl;
mt2=mt*mt;
q12=q1.m2();
q22=q2.m2();
Q=-q1-q2; // Define all momenta ingoing as in appendix of VDD
Q2=Q.m2();
// std::cout<<"Higgs mass Square? : "<<Q2<<std::endl;
Delta3=q12*q12+q22*q22+Q2*Q2-2*q12*q22-2*q12*Q2-2*q22*Q2;
- #ifdef USE_LT
+ #ifdef RHEJ_BUILD_WITH_LT
ans=looprwfactor*COM(0,-1)*C0DD(q1,q2,mt)*(2.*mt2+1./2.*(q12+q22-Q2)+2.*q12*q22*Q2/Delta3);
ans=ans+looprwfactor*COM(0,-1)*(B0DD(q2,mt)-B0DD(Q,mt))*q22*(q22-q12-Q2)/Delta3;
ans=ans+looprwfactor*COM(0,-1)*(B0DD(q1,mt)-B0DD(Q,mt))*q12*(q12-q22-Q2)/Delta3+1./16/M_PI/M_PI;
#else
ans=C0an(q1,q2,mt)*(2.*mt2+1./2.*(q12+q22-Q2)+2.*q12*q22*Q2/Delta3);
ans=ans+(B0an(q22,mt)-B0an(Q2,mt))*q22*(q22-q12-Q2)/Delta3;
ans=ans+(B0an(q12,mt)-B0an(Q2,mt))*q12*(q12-q22-Q2)/Delta3+1./16/M_PI/M_PI;
#endif
return ans;
}
COM cdot(current j1, current j2)
{
return j1[0]*j2[0]-j1[1]*j2[1]-j1[2]*j2[2]-j1[3]*j2[3];
}
COM cdot(HLV p, current j1) {
return j1[0]*p.e()-j1[1]*p.x()-j1[2]*p.y()-j1[3]*p.z();
}
void cmult(COM factor, current j1, current &cur)
{
cur[0]=factor*j1[0];
cur[1]=factor*j1[1];
cur[2]=factor*j1[2];
cur[3]=factor*j1[3];
}
void cadd(current j1, current j2, current j3, current j4, current j5, current &sum)
{
sum[0]=j1[0]+j2[0]+j3[0]+j4[0]+j5[0];
sum[1]=j1[1]+j2[1]+j3[1]+j4[1]+j5[1];
sum[2]=j1[2]+j2[2]+j3[2]+j4[2]+j5[2];
sum[3]=j1[3]+j2[3]+j3[3]+j4[3]+j5[3];
}
void cadd(current j1, current j2, current j3, current j4, current &sum) {
sum[0] = j1[0] + j2[0] + j3[0] + j4[0];
sum[1] = j1[1] + j2[1] + j3[1] + j4[1];
sum[2] = j1[2] + j2[2] + j3[2] + j4[2];
sum[3] = j1[3] + j2[3] + j3[3] + j4[3];
}
void cadd(current j1, current j2, current j3, current &sum)
{
sum[0]=j1[0]+j2[0]+j3[0];
sum[1]=j1[1]+j2[1]+j3[1];
sum[2]=j1[2]+j2[2]+j3[2];
sum[3]=j1[3]+j2[3]+j3[3];
}
void cadd(current j1, current j2, current &sum)
{
sum[0]=j1[0]+j2[0];
sum[1]=j1[1]+j2[1];
sum[2]=j1[2]+j2[2];
sum[3]=j1[3]+j2[3];
}
double abs2(COM a)
{
return (a*conj(a)).real();
}
double vabs2(CCurrent cur)
{
return abs2(cur.c0)-abs2(cur.c1)-abs2(cur.c2)-abs2(cur.c3);
}
double vre(CCurrent a, CCurrent b)
{
return real(a.c0*conj(b.c0)-a.c1*conj(b.c1)-a.c2*conj(b.c2)-a.c3*conj(b.c3));
}
CCurrent CCurrent::operator+(const CCurrent& other)
{
COM result_c0=c0 + other.c0;
COM result_c1=c1 + other.c1;
COM result_c2=c2 + other.c2;
COM result_c3=c3 + other.c3;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
CCurrent CCurrent::operator-(const CCurrent& other)
{
COM result_c0=c0 - other.c0;
COM result_c1=c1 - other.c1;
COM result_c2=c2 - other.c2;
COM result_c3=c3 - other.c3;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
CCurrent CCurrent::operator*(const double x)
{
COM result_c0=x*CCurrent::c0;
COM result_c1=x*CCurrent::c1;
COM result_c2=x*CCurrent::c2;
COM result_c3=x*CCurrent::c3;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
CCurrent CCurrent::operator/(const double x)
{
COM result_c0=CCurrent::c0/x;
COM result_c1=CCurrent::c1/x;
COM result_c2=CCurrent::c2/x;
COM result_c3=CCurrent::c3/x;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
CCurrent CCurrent::operator*(const COM x)
{
COM result_c0=x*CCurrent::c0;
COM result_c1=x*CCurrent::c1;
COM result_c2=x*CCurrent::c2;
COM result_c3=x*CCurrent::c3;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
CCurrent CCurrent::operator/(const COM x)
{
COM result_c0=(CCurrent::c0)/x;
COM result_c1=(CCurrent::c1)/x;
COM result_c2=(CCurrent::c2)/x;
COM result_c3=(CCurrent::c3)/x;
return CCurrent(result_c0,result_c1,result_c2,result_c3);
}
std::ostream& operator <<(std::ostream& os, const CCurrent& cur)
{
os << "("<<cur.c0<< " ; "<<cur.c1<<" , "<<cur.c2<<" , "<<cur.c3<<")";
return os;
}
CCurrent operator * ( double x, CCurrent& m)
{
return m*x;
}
CCurrent operator * ( COM x, CCurrent& m)
{
return m*x;
}
CCurrent operator / ( double x, CCurrent& m)
{
return m/x;
}
CCurrent operator / ( COM x, CCurrent& m)
{
return m/x;
}
COM CCurrent::dot(CLHEP::HepLorentzVector p1)
{
// Current goes (E,px,py,pz)
// std::cout<<"current = ("<<c0<<","<<c1<<","<<c2<<","<<c3<<")\n";
// Vector goes (px,py,pz,E)
// std::cout<<"vector = ("<<p1[0]<<","<<p1[1]<<","<<p1[2]<<","<<p1[3]<<")\n";
return p1[3]*c0-p1[0]*c1-p1[1]*c2-p1[2]*c3;
}
COM CCurrent::dot(CCurrent p1)
{
return p1.c0*c0-p1.c1*c1-p1.c2*c2-p1.c3*c3;
}
void j (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pin, bool helin,current &cur) {
cur[0]=0.;
cur[1]=0.;
cur[2]=0.;
cur[3]=0.;
double sqpop=sqrt(pout.plus());
double sqpom=sqrt(pout.minus());
COM poperp=pout.x()+COM(0,1)*pout.y();
if (helout!=helin) {
std::cerr<< "void j : Non-matching helicities at line " << __LINE__ << std::endl;
} else if (helout==false) { // negative helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*poperp/abs(poperp);
cur[2]=-COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*poperp/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=COM(0,1)*cur[1];
cur[3]=-cur[0];
}
} else { // positive helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*conj(poperp)/abs(poperp);
cur[2]=COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*conj(poperp)/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=-COM(0,1)*cur[1];
cur[3]=-cur[0];
}
}
}
CCurrent j (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pin, bool helin)
{
COM cur[4];
cur[0]=0.;
cur[1]=0.;
cur[2]=0.;
cur[3]=0.;
double sqpop=sqrt(pout.plus());
double sqpom=sqrt(pout.minus());
COM poperp=pout.x()+COM(0,1)*pout.y();
if (helout!=helin) {
std::cerr<< "void j : Non-matching helicities\n";
} else if (helout==false) { // negative helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*poperp/abs(poperp);
cur[2]=-COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*poperp/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=COM(0,1)*cur[1];
cur[3]=-cur[0];
}
} else { // positive helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*conj(poperp)/abs(poperp);
cur[2]=COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*conj(poperp)/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=-COM(0,1)*cur[1];
cur[3]=-cur[0];
}
}
CCurrent temp(cur[0],cur[1],cur[2],cur[3]);
return temp;
}
CCurrent jio (CLHEP::HepLorentzVector pin, bool helin, CLHEP::HepLorentzVector pout, bool helout)
{
COM cur[4];
cur[0]=0.;
cur[1]=0.;
cur[2]=0.;
cur[3]=0.;
double sqpop=sqrt(pout.plus());
double sqpom=sqrt(pout.minus());
COM poperp=pout.x()+COM(0,1)*pout.y();
if (helout!=helin) {
std::cerr<< "void j : Non-matching helicities\n";
} else if (helout==false) { // negative helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*conj(poperp)/abs(poperp);
cur[2]=COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*conj(poperp)/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=-COM(0,1)*cur[1];
cur[3]=-cur[0];
}
} else { // positive helicity
if (pin.plus()>pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0]=sqpop*sqpip;
cur[1]=sqpom*sqpip*poperp/abs(poperp);
cur[2]=-COM(0,1)*cur[1];
cur[3]=cur[0];
} else { // if backward
double sqpim=sqrt(pin.minus());
cur[0]=-sqpom*sqpim*poperp/abs(poperp);
cur[1]=-sqpim*sqpop;
cur[2]=COM(0,1)*cur[1];
cur[3]=-cur[0];
}
}
CCurrent temp(cur[0],cur[1],cur[2],cur[3]);
return temp;
}
// Current for <incoming state | mu | outgoing state>
void jio(HLV pin, bool helin, HLV pout, bool helout, current &cur) {
cur[0] = 0.0;
cur[1] = 0.0;
cur[2] = 0.0;
cur[3] = 0.0;
if(helin!=helout){
std::cout<<__LINE__<<" "<<__FILE__<<std::endl;
}
double sqpop = sqrt(pout.plus());
double sqpom = sqrt(pout.minus());
COM poperp = pout.x() + COM(0, 1) * pout.y();
if (helout == false) {
if (pin.plus() > pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0] = sqpop * sqpip;
cur[1] = sqpom * sqpip * conj(poperp) / abs(poperp);
cur[2] = COM(0,1) * cur[1];
cur[3] = cur[0];
}
else {
double sqpim = sqrt(pin.minus());
cur[0] = -sqpom * sqpim * conj(poperp) / abs(poperp);
cur[1] = -sqpim * sqpop;
cur[2] = -COM(0,1) * cur[1];
cur[3] = -cur[0];
}
}
else {
if (pin.plus() > pin.minus()) { // if forward
double sqpip = sqrt(pin.plus());
cur[0] = sqpop * sqpip;
cur[1] = sqpom * sqpip*poperp/abs(poperp);
cur[2] = -COM(0,1)*cur[1];
cur[3] = cur[0];
}
else {
double sqpim = sqrt(pin.minus());
cur[0] = -sqpom * sqpim * poperp/abs(poperp);
cur[1] = -sqpim * sqpop;
cur[2] = COM(0,1)*cur[1];
cur[3] = -cur[0];
}
}
}
// Current for <outgoing state | mu | outgoing state>
void joo(HLV pi, bool heli, HLV pj, bool helj, current &cur) {
// Zero our current
cur[0] = 0.0;
cur[1] = 0.0;
cur[2] = 0.0;
cur[3] = 0.0;
if(helj){
std::cout<<__LINE__<<" "<<__FILE__<<std::endl;
}
// If positive helicity swap momenta
if (heli == true) {
HLV dummy;
dummy = pi;
pi = pj;
pj = dummy;
}
double sqpjp = sqrt(pj.plus());
double sqpjm = sqrt(pj.minus());
double sqpip = sqrt(pi.plus());
double sqpim = sqrt(pi.minus());
COM piperp = pi.x() + COM(0,1) * pi.y();
COM pjperp = pj.x() + COM(0,1) * pj.y();
COM phasei = piperp / abs(piperp);
COM phasej = pjperp / abs(pjperp);
cur[0] = sqpim * sqpjm * phasei * conj(phasej) + sqpip * sqpjp;
cur[1] = sqpim * sqpjp * phasei + sqpip * sqpjm * conj(phasej);
cur[2] = -COM(0, 1) * (sqpim * sqpjp * phasei - sqpip * sqpjm * conj(phasej));
cur[3] = -sqpim * sqpjm * phasei * conj(phasej) + sqpip * sqpjp;
}
CCurrent joo (CLHEP::HepLorentzVector pi, bool heli, CLHEP::HepLorentzVector pj, bool helj)
{
COM cur[4];
if (heli!=helj) {
std::cerr<< "void j : Non-matching helicities\n";
} else if (heli==true) { // negative helicity
CLHEP::HepLorentzVector dummy;
dummy=pi;
pi=pj;
pj=dummy;
}
double sqpjp=sqrt(pj.plus());
double sqpjm=sqrt(pj.minus());
double sqpip=sqrt(pi.plus());
double sqpim=sqrt(pi.minus());
COM piperp=pi.x()+COM(0,1)*pi.y();
COM pjperp=pj.x()+COM(0,1)*pj.y();
COM phasei=piperp/abs(piperp);
COM phasej=pjperp/abs(pjperp);
cur[0]=sqpim*sqpjm*phasei*conj(phasej)+sqpip*sqpjp;
cur[1]=sqpim*sqpjp*phasei+sqpip*sqpjm*conj(phasej);
cur[2]=-COM(0,1)*(sqpim*sqpjp*phasei-sqpip*sqpjm*conj(phasej));
cur[3]=-sqpim*sqpjm*phasei*conj(phasej)+sqpip*sqpjp;
CCurrent temp(cur[0],cur[1],cur[2],cur[3]);
return temp;
}
// Current Functions
// Current for <outgoing state | mu | incoming state>
void joi(HLV pout, bool helout, HLV pin, bool helin, current &cur) {
cur[0] = 0.0;
cur[1] = 0.0;
cur[2] = 0.0;
cur[3] = 0.0;
if(helin){
std::cout<<__LINE__<<" "<<__FILE__<<std::endl;
}
double sqpop = sqrt(pout.plus());
double sqpom = sqrt(pout.minus());
COM poperp = pout.x() + COM(0, 1) * pout.y();
if (helout == false) {
if (pin.plus() > pin.minus()) { // if forward
double sqpip=sqrt(pin.plus());
cur[0] = sqpop * sqpip;
cur[1] = sqpom * sqpip * poperp/abs(poperp);
cur[2] = -COM(0,1)*cur[1];
cur[3] = cur[0];
}
else {
double sqpim = sqrt(pin.minus());
cur[0] = -sqpom*sqpim*poperp/abs(poperp);
cur[1] = -sqpim*sqpop;
cur[2] = COM(0,1)*cur[1];
cur[3] = -cur[0];
}
}
else {
if (pin.plus() > pin.minus()) { // if forward
double sqpip = sqrt(pin.plus());
cur[0] = sqpop * sqpip;
cur[1] = sqpom * sqpip*conj(poperp)/abs(poperp);
cur[2] = COM(0,1)*cur[1];
cur[3] = cur[0];
}
else {
double sqpim = sqrt(pin.minus());
cur[0] = -sqpom * sqpim * conj(poperp)/abs(poperp);
cur[1] = -sqpim * sqpop;
cur[2] = -COM(0,1)*cur[1];
cur[3] = -cur[0];
}
}
}
double jM2 (CLHEP::HepLorentzVector p1out, bool hel1out, CLHEP::HepLorentzVector p1in, bool hel1in, CLHEP::HepLorentzVector p2out, bool hel2out, CLHEP::HepLorentzVector p2in, bool hel2in)
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current C1,C2;
j (p1out,hel1out,p1in,hel1in, C1);
j (p2out,hel2out,p2in,hel2in, C2);
std::cout << "# From Currents, C1 : ("<<C1[0]<<","<<C1[1]<<","<<C1[2]<<","<<C1[3]<<"\n";
std::cout << "# From Currents, C2 : ("<<C2[0]<<","<<C2[1]<<","<<C2[2]<<","<<C2[3]<<"\n";
COM M=cdot(C1,C2);
return (M*conj(M)).real()/(q1.m2()*q2.m2());
}
void jW (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pe, bool hele, CLHEP::HepLorentzVector pnu, bool helnu, CLHEP::HepLorentzVector pin, bool helin, current cur)
{
// NOTA BENE: Conventions for W+ --> e+ nu, so that nu is lepton(6), e is anti-lepton(5)
// Need to swap e and nu for events with W- --> e- nubar!
if (helin==helout && hele==helnu) {
CLHEP::HepLorentzVector qa=pout+pe+pnu;
CLHEP::HepLorentzVector qb=pin-pe-pnu;
double ta(qa.m2()),tb(qb.m2());
current t65,vout,vin,temp2,temp3,temp5;
joo(pnu,helnu,pe,hele,t65);
vout[0]=pout.e();
vout[1]=pout.x();
vout[2]=pout.y();
vout[3]=pout.z();
vin[0]=pin.e();
vin[1]=pin.x();
vin[2]=pin.y();
vin[3]=pin.z();
COM brac615=cdot(t65,vout);
COM brac645=cdot(t65,vin);
// prod1565 and prod6465 are zero for Ws (not Zs)!!
// noalias(temp)=prod(trans(CurrentOutOut(pout,helout,pnu,helout)),metric);
joo(pout,helout,pnu,helout,temp2);
// noalias(temp2)=prod(temp,ctemp);
COM prod1665=cdot(temp2,t65);
// noalias(temp)=prod(trans(Current(pe,helin,pin,helin)),metric);
// noalias(temp2)=prod(temp,ctemp);
j(pe,helin,pin,helin,temp3);
COM prod5465=cdot(temp3,t65);
// noalias(temp)=prod(trans(Current(pnu,helin,pin,helin)),metric);
// noalias(temp2)=prod(temp,ctemp);
joo(pout,helout,pe,helout,temp2);
j(pnu,helnu,pin,helin,temp3);
j(pout,helout,pin,helin,temp5);
current term1,term2,term3,sum;
cmult(2.*brac615/ta+2.*brac645/tb,temp5,term1);
cmult(prod1665/ta,temp3,term2);
cmult(-prod5465/tb,temp2,term3);
// cur=((2.*brac615*Current(pout,helout,pin,helin)+prod1565*Current(pe,helin,pin,helin)+prod1665*Current(pnu,helin,pin,helin))/ta + (2.*brac645*Current(pout,helout,pin,helin)-prod5465*CurrentOutOut(pout,helout,pe,helout)-prod6465*CurrentOutOut(pout,helout,pnu,helout))/tb);
// cur=((2.*brac615*temp5+prod1565*temp3+prod1665*temp4)/ta + (2.*brac645*temp5-prod5465*temp1-prod6465*temp2)/tb);
cadd(term1,term2,term3,sum);
// std::cout<<"sum: ("<<sum[0]<<","<<sum[1]<<","<<sum[2]<<","<<sum[3]<<")\n";
cur[0]=sum[0];
cur[1]=sum[1];
cur[2]=sum[2];
cur[3]=sum[3];
}
}
void jWbar (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pe, bool hele, CLHEP::HepLorentzVector pnu, bool helnu, CLHEP::HepLorentzVector pin, bool helin, current cur)
{
// NOTA BENE: Conventions for W+ --> e+ nu, so that nu is lepton(6), e is anti-lepton(5)
// Need to swap e and nu for events with W- --> e- nubar!
if (helin==helout && hele==helnu) {
CLHEP::HepLorentzVector qa=pout+pe+pnu;
CLHEP::HepLorentzVector qb=pin-pe-pnu;
double ta(qa.m2()),tb(qb.m2());
current t65,vout,vin,temp2,temp3,temp5;
joo(pnu,helnu,pe,hele,t65);
vout[0]=pout.e();
vout[1]=pout.x();
vout[2]=pout.y();
vout[3]=pout.z();
vin[0]=pin.e();
vin[1]=pin.x();
vin[2]=pin.y();
vin[3]=pin.z();
COM brac615=cdot(t65,vout);
COM brac645=cdot(t65,vin);
// prod1565 and prod6465 are zero for Ws (not Zs)!!
joo(pe,helout,pout,helout,temp2); // temp2 is <5|alpha|1>
COM prod5165=cdot(temp2,t65);
jio(pin,helin,pnu,helin,temp3); // temp3 is <4|alpha|6>
COM prod4665=cdot(temp3,t65);
joo(pnu,helout,pout,helout,temp2); // temp2 is now <6|mu|1>
jio(pin,helin,pe,helin,temp3); // temp3 is now <4|mu|5>
jio(pin,helin,pout,helout,temp5); // temp5 is <4|mu|1>
current term1,term2,term3,sum;
cmult(-2.*brac615/ta-2.*brac645/tb,temp5,term1);
cmult(-prod5165/ta,temp3,term2);
cmult(prod4665/tb,temp2,term3);
// cur=((2.*brac615*Current(pout,helout,pin,helin)+prod1565*Current(pe,helin,pin,helin)+prod1665*Current(pnu,helin,pin,helin))/ta + (2.*brac645*Current(pout,helout,pin,helin)-prod5465*CurrentOutOut(pout,helout,pe,helout)-prod6465*CurrentOutOut(pout,helout,pnu,helout))/tb);
// cur=((2.*brac615*temp5+prod1565*temp3+prod1665*temp4)/ta + (2.*brac645*temp5-prod5465*temp1-prod6465*temp2)/tb);
cadd(term1,term2,term3,sum);
// std::cout<<"term1: ("<<temp5[0]<<" "<<temp5[1]<<" "<<temp5[2]<<" "<<temp5[3]<<")"<<std::endl;
// std::cout<<"sum: ("<<sum[0]<<","<<sum[1]<<","<<sum[2]<<","<<sum[3]<<")\n";
cur[0]=sum[0];
cur[1]=sum[1];
cur[2]=sum[2];
cur[3]=sum[3];
}
}
double jMWqQ (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qQ->qenuQ scattering
// p1: quark (with W emittance)
// p2: Quark
{
current mj1m,mj2p,mj2m;
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
jW(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
// std::cout<<"jMW1: ("<<mj1m[0]<<","<<mj1m[1]<<","<<mj1m[2]<<","<<mj1m[3]<<")\n";
// std::cout<<"jMW2: ("<<mj2p[0]<<","<<mj2p[1]<<","<<mj2p[2]<<","<<mj2p[3]<<")\n";
// std::cout<<"jMW3: ("<<mj2m[0]<<","<<mj2m[1]<<","<<mj2m[2]<<","<<mj2m[3]<<")\n";
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf^2
return (4./3.)*(4./3.)*(a2Mmp+a2Mmm)/(q1.m2()*q2.m2());
}
double jMWqQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qQ->qenuQ scattering
// p1: quark (with W emittance)
// p2: Quark
{
current mj1m,mj2p,mj2m;
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
jW(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
jio(p2in,true,p2out,true,mj2p);
jio(p2in,false,p2out,false,mj2m);
// std::cout<<"jMW1: ("<<mj1m[0]<<","<<mj1m[1]<<","<<mj1m[2]<<","<<mj1m[3]<<")\n";
// std::cout<<"jMW2: ("<<mj2p[0]<<","<<mj2p[1]<<","<<mj2p[2]<<","<<mj2p[3]<<")\n";
// std::cout<<"jMW3: ("<<mj2m[0]<<","<<mj2m[1]<<","<<mj2m[2]<<","<<mj2m[3]<<")\n";
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf^2
return (4./3.)*(4./3.)*(a2Mmp+a2Mmm)/(q1.m2()*q2.m2());
}
double jMWqbarQ (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qQ->qenuQ scattering
// p1: quark (with W emittance)
// p2: Quark
{
current mj1m,mj2p,mj2m;
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
jWbar(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
// std::cout<<"jMW1: ("<<mj1m[0]<<","<<mj1m[1]<<","<<mj1m[2]<<","<<mj1m[3]<<")\n";
// std::cout<<"jMW2: ("<<mj2p[0]<<","<<mj2p[1]<<","<<mj2p[2]<<","<<mj2p[3]<<")\n";
// std::cout<<"jMW3: ("<<mj2m[0]<<","<<mj2m[1]<<","<<mj2m[2]<<","<<mj2m[3]<<")\n";
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf^2
return (4./3.)*(4./3.)*(a2Mmp+a2Mmm)/(q1.m2()*q2.m2());
}
double jMWqbarQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qQ->qenuQ scattering
// p1: quark (with W emittance)
// p2: Quark
{
current mj1m,mj2p,mj2m;
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
jWbar(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
jio(p2in,true,p2out,true,mj2p);
jio(p2in,false,p2out,false,mj2m);
// std::cout<<"jMW1: ("<<mj1m[0]<<","<<mj1m[1]<<","<<mj1m[2]<<","<<mj1m[3]<<")\n";
// std::cout<<"jMW2: ("<<mj2p[0]<<","<<mj2p[1]<<","<<mj2p[2]<<","<<mj2p[3]<<")\n";
// std::cout<<"jMW3: ("<<mj2m[0]<<","<<mj2m[1]<<","<<mj2m[2]<<","<<mj2m[3]<<")\n";
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf^2
return (4./3.)*(4./3.)*(a2Mmp+a2Mmm)/(q1.m2()*q2.m2());
}
double jMWqg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qg->qenug scattering
// p1: quark
// p2: gluon
{
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj2p,mj2m;
jW(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0.) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
double sst = nonflipcolourmult*(a2Mmp+a2Mmm);
// double sstsave=sst;
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf*Ca=4
return 4.*sst/(q1.m2()*q2.m2());
}
double jMWqbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector pe, CLHEP::HepLorentzVector pnu,CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qg->qenug scattering
// p1: quark
// p2: gluon
{
CLHEP::HepLorentzVector q1=p1in-p1out-pe-pnu;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj2p,mj2m;
jWbar(p1out,false,pe,false,pnu,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
// mj1m.mj2p
COM Mmp=cdot(mj1m,mj2p);
// mj1m.mj2m
COM Mmm=cdot(mj1m,mj2m);
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0.) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
double sst = nonflipcolourmult*(a2Mmp+a2Mmm);
// double sstsave=sst;
// // Leave division by colour and Helicity avg until Tree files
// Leave multi. of couplings to later
// Multiply by Cf*Ca=4
return 4.*sst/(q1.m2()*q2.m2());
}
double jM2qQ (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
{
// std::cerr<<"Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
current mj1m,mj1p,mj2m,mj2p;
j(p1out,true,p1in,true,mj1p);
j(p1out,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double sst=abs2(Mmm)+abs2(Mmp)+abs2(Mpp)+abs2(Mpm);
// Multiply by Cf^2
return (4./3.)*(4./3.)*(sst)/(q1.m2()*q2.m2());
}
double jM2qQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj1p,mj2m,mj2p;
j(p1out,true,p1in,true,mj1p);
j(p1out,false,p1in,false,mj1m);
jio(p2in,true,p2out,true,mj2p);
jio(p2in,false,p2out,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double sumsq=abs2(Mmm)+abs2(Mmp)+abs2(Mpp)+abs2(Mpm);
// Multiply by Cf^2
return (4./3.)*(4./3.)*(sumsq)/(q1.m2()*q2.m2());
}
double jM2qbarQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj1p,mj2m,mj2p;
jio(p1in,true,p1out,true,mj1p);
jio(p1in,false,p1out,false,mj1m);
jio(p2in,true,p2out,true,mj2p);
jio(p2in,false,p2out,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double sumsq=abs2(Mmm)+abs2(Mmp)+abs2(Mpp)+abs2(Mpm);
// Multiply by Cf^2
return (4./3.)*(4./3.)*(sumsq)/(q1.m2()*q2.m2());
}
double jM2qg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qg scattering
// p1: quark
// p2: gluon
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj1p,mj2m,mj2p;
j(p1out,true,p1in,true,mj1p);
j(p1out,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0.) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
double a2Mpp=abs2(Mpp);
double a2Mpm=abs2(Mpm);
double sst = nonflipcolourmult*(a2Mpp+a2Mpm+a2Mmp+a2Mmm);
// double sstsave=sst;
// std::cout <<"ratio: "<<sst/sstsave<<std::endl;
// Cf*Ca=4
return 4.*sst/(q1.m2()*q2.m2());
}
double jM2qbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for qg scattering
// p1: quark
// p2: gluon
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj1p,mj2m,mj2p;
jio(p1in,true,p1out,true,mj1p);
jio(p1in,false,p1out,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0.) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
double a2Mpp=abs2(Mpp);
double a2Mpm=abs2(Mpm);
double sst = nonflipcolourmult*(a2Mpp+a2Mpm+a2Mmp+a2Mmm);
// double sstsave=sst;
// std::cout <<"ratio: "<<sst/sstsave<<std::endl;
// Cf*Ca=4
return 4.*sst/(q1.m2()*q2.m2());
}
double jM2gg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in)
// Calculates the square of the current contractions for gg scattering
// p1: gluon
// p2: gluon
{
CLHEP::HepLorentzVector q1=p1in-p1out;
CLHEP::HepLorentzVector q2=-(p2in-p2out);
current mj1m,mj1p,mj2m,mj2p;
j(p1out,true,p1in,true,mj1p);
j(p1out,false,p1in,false,mj1m);
j(p2out,true,p2in,true,mj2p);
j(p2out,false,p2in,false,mj2m);
COM Mmp=cdot(mj1m,mj2p);
COM Mmm=cdot(mj1m,mj2m);
COM Mpp=cdot(mj1p,mj2p);
COM Mpm=cdot(mj1p,mj2m);
double ratio1; // p1-/pa- in the notes
// if (p1in.plus()>1.) // if the gluon is the positive. Should have been a
// // test against 0, but 1. is better
if (p1in.pz()>0.) // a much better test
ratio1=p1out.plus()/p1in.plus();
else // the gluon is the negative
ratio1=p1out.minus()/p1in.minus();
double nonflipcolourmult1=(1.-1./9.)/2.*(ratio1+1./ratio1)+1./9.;
double ratio2; // p2-/pb- in the notes
if (p2in.pz()>0.) // a much better test
ratio2=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio2=p2out.minus()/p2in.minus();
double nonflipcolourmult2=(1.-1./9.)/2.*(ratio2+1./ratio2)+1./9.;
// sum of spinor strings ||^2
double a2Mmp=abs2(Mmp);
double a2Mmm=abs2(Mmm);
double a2Mpp=abs2(Mpp);
double a2Mpm=abs2(Mpm);
double sst = nonflipcolourmult1*nonflipcolourmult2*(a2Mpp+a2Mpm+a2Mmp+a2Mmm);
// double sstsave=sst;
// std::cout <<"ratio: "<<sst/sstsave<<std::endl;
// Ca*Ca=9
return 9.*sst/(q1.m2()*q2.m2());
}
double MH2helper(current C1, current C2, current q1, current q2)
{
COM M;
COM temp1,temp2;
// First the C1.q2 * C2.q1 - part
temp1=cdot(C1,q2);
temp2=cdot(C2,q1);
M=temp1*temp2;
// Then the C1.C2 * q1.q2
temp1=cdot(C1,C2);
temp2=cdot(q1,q2);
M-=temp1*temp2;
return (M*conj(M)).real();
}
COM cHdot(current C1, current C2, current q1, current q2, double mt, bool incBot, double mb)
{
if (mt == infinity) {
return (cdot(C1,C2)*cdot(q1,q2)-cdot(C1,q2)*cdot(C2,q1))/(6*M_PI*v);
}
else {
CLHEP::HepLorentzVector vq1,vq2;
vq1.set(q1[1].real(),q1[2].real(),q1[3].real(),q1[0].real());
vq2.set(q2[1].real(),q2[2].real(),q2[3].real(),q2[0].real());
// first minus sign obtained because of q1-difference to VDD
// std::cout<<"A1 : " << A1(-vq1,vq2)<<std::endl;
// std::cout<<"A2 : " << A2(-vq1,vq2)<<std::endl;
if(!(incBot)) // Factor is because 4 mt^2 g^2/v A1 -> 16 pi mt^2/v alphas, and we divide by a factor 4 at the amp sqaured level later which I absorb here (i.e. I divide by 2)
return 8.*M_PI*mt*mt/v*(-cdot(C1,q2)*cdot(C2,q1)*A1(-vq1,vq2,mt)-cdot(C1,C2)*A2(-vq1,vq2,mt));
else
return 8.*M_PI*mt*mt/v*(-cdot(C1,q2)*cdot(C2,q1)*A1(-vq1,vq2,mt)-cdot(C1,C2)*A2(-vq1,vq2,mt)) + 8.*M_PI*mb*mb/v*(-cdot(C1,q2)*cdot(C2,q1)*A1(-vq1,vq2,mb)-cdot(C1,C2)*A2(-vq1,vq2,mb));
}
}
double MH2qQ (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
// CLHEP::HepLorentzVector q1=p1in-p1out;
// CLHEP::HepLorentzVector q2=-(p2in-p2out);
current j1p,j1m,j2p,j2m,q1v,q2v;
j (p1out,true,p1in,true,j1p);
j (p1out,false,p1in,false,j1m);
j (p2out,true,p2in,true,j2p);
j (p2out,false,p2in,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
COM Mmp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
COM Mmm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
COM Mpp=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
COM Mpm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
double sst=abs2(Mmp)+abs2(Mmm)+abs2(Mpp)+abs2(Mpm);
// return (4./3.)*(4./3.)*sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2qQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
// CLHEP::HepLorentzVector q1=p1in-p1out;
// CLHEP::HepLorentzVector q2=-(p2in-p2out);
current j1p,j1m,j2p,j2m,q1v,q2v;
j (p1out,true,p1in,true,j1p);
j (p1out,false,p1in,false,j1m);
jio (p2in,true,p2out,true,j2p);
jio (p2in,false,p2out,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
COM Mmp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
COM Mmm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
COM Mpp=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
COM Mpm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
double sst=abs2(Mmp)+abs2(Mmm)+abs2(Mpp)+abs2(Mpm);
// return (4./3.)*(4./3.)*sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2qbarQ (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
// CLHEP::HepLorentzVector q1=p1in-p1out;
// CLHEP::HepLorentzVector q2=-(p2in-p2out);
current j1p,j1m,j2p,j2m,q1v,q2v;
jio (p1in,true,p1out,true,j1p);
jio (p1in,false,p1out,false,j1m);
j (p2out,true,p2in,true,j2p);
j (p2out,false,p2in,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
COM Mmp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
COM Mmm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
COM Mpp=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
COM Mpm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
double sst=abs2(Mmp)+abs2(Mmm)+abs2(Mpp)+abs2(Mpm);
// return (4./3.)*(4./3.)*sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2qbarQbar (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
// CLHEP::HepLorentzVector q1=p1in-p1out;
// CLHEP::HepLorentzVector q2=-(p2in-p2out);
current j1p,j1m,j2p,j2m,q1v,q2v;
jio (p1in,true,p1out,true,j1p);
jio (p1in,false,p1out,false,j1m);
jio (p2in,true,p2out,true,j2p);
jio (p2in,false,p2out,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
COM Mmp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
COM Mmm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
COM Mpp=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
COM Mpm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
double sst=abs2(Mmp)+abs2(Mmm)+abs2(Mpp)+abs2(Mpm);
// return (4./3.)*(4./3.)*sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2qg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
// q~p1 g~p2 (i.e. ALWAYS p1 for quark, p2 for gluon)
// should be called with q1 meant to be contracted with p2 in first part of vertex
// (i.e. if g is backward, q1 is forward)
{
current j1p,j1m,j2p,j2m,q1v,q2v;
j (p1out,true,p1in,true,j1p);
j (p1out,false,p1in,false,j1m);
j (p2out,true,p2in,true,j2p);
j (p2out,false,p2in,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
// First, calculate the non-flipping amplitudes:
COM Mpp=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
COM Mpm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
COM Mmp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
COM Mmm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
//cout << "Bits in MH2qg: " << Mpp << " " << Mpm << " " << Mmp << " " << Mmm << endl;
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
double sst=nonflipcolourmult*(abs2(Mmp)+abs2(Mmm)+abs2(Mpp)+abs2(Mpm));
// Cf*Ca=4
// return 4.*sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return sst/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2qbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
// qbar~p1 g~p2 (i.e. ALWAYS p1 for anti-quark, p2 for gluon)
// should be called with q1 meant to be contracted with p2 in first part of vertex
// (i.e. if g is backward, q1 is forward)
{
current j1p,j1m,j2p,j2m,q1v,q2v;
jio (p1in,true,p1out,true,j1p);
jio (p1in,false,p1out,false,j1m);
j (p2out,true,p2in,true,j2p);
j (p2out,false,p2in,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
// First, calculate the non-flipping amplitudes:
COM amp,amm,apm,app;
app=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
apm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
amp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
amm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
double MH2sum;
MH2sum=abs2(app);
// std::cout << "MH2sum : "<<MH2sum<<std::endl;
// then do plus on minus
MH2sum+=abs2(amm);
// etc...
MH2sum+=abs2(apm);
MH2sum+=abs2(amp);
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
MH2sum*=nonflipcolourmult;
// Cf*Ca=4
// return 4.*MH2sum/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return MH2sum/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
double MH2gg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
// g~p1 g~p2
// should be called with q1 meant to be contracted with p2 in first part of vertex
// (i.e. if g is backward, q1 is forward)
{
current j1p,j1m,j2p,j2m,q1v,q2v;
j (p1out,true,p1in,true,j1p);
j (p1out,false,p1in,false,j1m);
j (p2out,true,p2in,true,j2p);
j (p2out,false,p2in,false,j2m);
q1v[0]=q1.e();
q1v[1]=q1.x();
q1v[2]=q1.y();
q1v[3]=q1.z();
q2v[0]=q2.e();
q2v[1]=q2.x();
q2v[2]=q2.y();
q2v[3]=q2.z();
// First, calculate the non-flipping amplitudes:
COM amp,amm,apm,app;
app=cHdot(j1p,j2p,q1v,q2v,mt, incBot, mb);
apm=cHdot(j1p,j2m,q1v,q2v,mt, incBot, mb);
amp=cHdot(j1m,j2p,q1v,q2v,mt, incBot, mb);
amm=cHdot(j1m,j2m,q1v,q2v,mt, incBot, mb);
double MH2sum;
MH2sum=abs2(app);
// std::cout << "MH2sum : "<<MH2sum<<std::endl;
// then do plus on minus
MH2sum+=abs2(amm);
// etc...
MH2sum+=abs2(apm);
MH2sum+=abs2(amp);
double ratio1; // p1-/pa- in the notes
// if (p1in.plus()>0) // if the gluon is the positive
if (p1in.pz()>0.) // if the gluon is the positive
ratio1=p1out.plus()/p1in.plus();
else // the gluon is the negative
ratio1=p1out.minus()/p1in.minus();
double nonflipcolourmult1=(1.-1./9.)/2.*(ratio1+1./ratio1)+1./9.;
double ratio2; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0.) // if the gluon is the positive
ratio2=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio2=p2out.minus()/p2in.minus();
double nonflipcolourmult2=(1.-1./9.)/2.*(ratio2+1./ratio2)+1./9.;
MH2sum*=nonflipcolourmult1*nonflipcolourmult2;
// Ca*Ca=9
// return 9.*MH2sum/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
return MH2sum/((p1in-p1out).m2()*(p2in-p2out).m2()*q1.m2()*q2.m2());
}
// // Z's stuff
// void jZ(HLV pin, HLV pout, HLV pem, HLV pep, bool HelPartons, bool HelLeptons, current cur) {
// // Init current to zero
// cur[0] = 0.0;
// cur[1] = 0.0;
// cur[2] = 0.0;
// cur[3] = 0.0;
// // Temporary variables
// COM temp;
// current Term_1, Term_2, Term_3, Term_4, J_temp, TempCur1, TempCur2;
// // Momentum of virtual gluons aroun weak boson emission site
// HLV qa = pout + pep + pem;
// HLV qb = pin - pep - pem;
// double ta = qa.m2();
// double tb = qb.m2();
// // Out-Out currents:
// current Em_Ep, Out_Em, Out_Ep;
// // Other currents:
// current Out_In, Em_In, Ep_In;
// joi(pout, HelPartons, pin, HelPartons, Out_In);
// joi(pem, HelLeptons, pin, HelPartons, Em_In);
// joi(pep, HelLeptons, pin, HelPartons, Ep_In);
// joo(pem, HelLeptons, pep, HelLeptons, Em_Ep);
// joo(pout, HelPartons, pem, HelLeptons, Out_Em);
// joo(pout, HelPartons, pep, HelLeptons, Out_Ep);
// if (HelLeptons == HelPartons) {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, Out_In, Term_1);
// temp = cdot(Out_Em, Em_Ep);
// cmult(temp / ta , Em_In, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, Out_In, Term_3);
// temp = -cdot(Ep_In, Em_Ep);
// cmult(temp / tb, Out_Ep, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// else {
// if (HelPartons == true) {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, Out_In, Term_1);
// joo(pout, true, pep, true, TempCur1);
// joi(pep, true, pin, true, TempCur2);
// temp = cdot(TempCur1, Em_Ep);
// cmult(temp / ta , TempCur2, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, Out_In, Term_3);
// joo(pout, true, pem, true, TempCur1);
// joi(pem, true, pin, true, TempCur2);
// temp = -cdot(TempCur2, Em_Ep);
// cmult(temp / tb, TempCur1, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// else {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, Out_In, Term_1);
// joo(pout, false, pep, false, TempCur1);
// joi(pep, false, pin, false, TempCur2);
// temp = cdot(TempCur1, Em_Ep);
// cmult(temp / ta, TempCur2, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, Out_In, Term_3);
// joo(pout, false, pem, false, TempCur1);
// joi(pem, false, pin, false, TempCur2);
// temp = -cdot(TempCur2, Em_Ep);
// cmult(temp / tb, TempCur1, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// }
// }
// void jZbar(HLV pin, HLV pout, HLV pem, HLV pep, bool HelPartons, bool HelLeptons, current cur) {
// // Init current to zero
// cur[0] = 0.0;
// cur[1] = 0.0;
// cur[2] = 0.0;
// cur[3] = 0.0;
// // Temporary variables
// COM temp;
// current Term_1, Term_2, Term_3, Term_4, J_temp, TempCur1, TempCur2;
// // Transfered 4-momenta
// HLV qa = pout + pep + pem;
// HLV qb = pin - pep - pem;
// // The square of the transfered 4-momenta
// double ta = qa.m2();
// double tb = qb.m2();
// // Out-Out currents:
// current Em_Ep, Em_Out, Ep_Out;
// // In-Out currents:
// current In_Out, In_Em, In_Ep;
// // Safe to use the currents since helicity structure is ok
// if (HelPartons == HelLeptons) {
// jio(pin, HelPartons, pout, HelPartons, In_Out);
// joo(pem, HelLeptons, pep, HelLeptons, Em_Ep);
// jio(pin, HelPartons, pem, HelLeptons, In_Em);
// jio(pin, HelPartons, pep, HelLeptons, In_Ep);
// joo(pem, HelLeptons, pout, HelPartons, Em_Out);
// joo(pep, HelLeptons, pout, HelPartons, Ep_Out);
// }
// else {
// jio(pin, HelPartons, pout, HelPartons, In_Out);
// joo(pem, HelLeptons, pep, HelLeptons, Em_Ep);
// In_Em[0] = 0.0;
// In_Em[1] = 0.0;
// In_Em[2] = 0.0;
// In_Em[3] = 0.0;
// In_Ep[0] = 0.0;
// In_Ep[1] = 0.0;
// In_Ep[2] = 0.0;
// In_Ep[3] = 0.0;
// Em_Out[0] = 0.0;
// Em_Out[1] = 0.0;
// Em_Out[2] = 0.0;
// Em_Out[3] = 0.0;
// Ep_Out[0] = 0.0;
// Ep_Out[1] = 0.0;
// Ep_Out[2] = 0.0;
// Ep_Out[3] = 0.0;
// }
// if (HelLeptons == HelPartons) {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, In_Out, Term_1);
// temp = cdot(Ep_Out, Em_Ep);
// cmult(temp / ta, In_Ep, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, In_Out, Term_3);
// temp = - cdot(In_Em, Em_Ep);
// cmult(temp / tb, Em_Out, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// else {
// if (HelPartons == true) {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, In_Out, Term_1);
// joo(pem, true, pout, true, TempCur1);
// jio(pin, true, pem, true, TempCur2);
// temp = cdot(TempCur1, Em_Ep);
// cmult(temp / ta , TempCur2, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, In_Out, Term_3);
// joo(pep, true, pout, true, TempCur1);
// jio(pin, true, pep, true, TempCur2);
// temp = - cdot(TempCur2, Em_Ep);
// cmult(temp / tb, TempCur1, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// else {
// temp = 2.0 * cdot(pout, Em_Ep);
// cmult(temp / ta, In_Out, Term_1);
// joo(pem, false, pout, false, TempCur1);
// jio(pin, false, pem, false, TempCur2);
// temp = cdot(TempCur1, Em_Ep);
// cmult(temp / ta , TempCur2, Term_2);
// temp = 2.0 * cdot(pin, Em_Ep);
// cmult(temp / tb, In_Out, Term_3);
// joo(pep, false, pout, false, TempCur1);
// jio(pin, false, pep, false, TempCur2);
// temp = - cdot(TempCur2, Em_Ep);
// cmult(temp / tb, TempCur1, Term_4);
// cadd(Term_1, Term_2, Term_3, Term_4, J_temp);
// cur[0] = J_temp[0];
// cur[1] = J_temp[1];
// cur[2] = J_temp[2];
// cur[3] = J_temp[3];
// }
// }
// }
// // Progagators
// COM PZ(double s) {
// double MZ, GammaZ;
// MZ = 9.118800e+01; // Mass of the mediating gauge boson
// GammaZ = 2.441404e+00; // Z peak width
// // Return Z Prop value
// return 1.0 / (s - MZ * MZ + COM(0.0, 1.0) * GammaZ * MZ);
// }
// COM PG(double s) {
// return 1.0 / s;
// }
// // Non-gluonic with pa emitting
// std::vector <double> jMZqQ (HLV pa, HLV pb, HLV p1, HLV p2, HLV pep, HLV pem, std::vector <double> VProducts, std::vector < std::vector <double> > Virtuals, int aptype, int bptype, bool UseVirtuals, bool BottomLineEmit) {
// std::vector <double> ScaledWeights;
// double Sum;
// // Propagator factors
// COM PZs = PZ((pep + pem).m2());
// COM PGs = PG((pep + pem).m2());
// // Emitting current initialisation
// current j1pptop, j1pmtop; // Emission from top line
// current j1ppbot, j1pmbot; // Emission from bottom line
// // Non-emitting current initialisation
// current j2ptop, j2mtop; // Emission from top line
// current j2pbot, j2mbot; // Emission from bottom line
// // Currents for top emission
// // Upper current calculations
// // if a is a quark
// if (aptype > 0) {
// jZ(pa, p1, pem, pep, true, true, j1pptop);
// jZ(pa, p1, pem, pep, true, false, j1pmtop);
// }
// // if a is an antiquark
// else {
// jZbar(pa, p1, pem, pep, true, true, j1pptop);
// jZbar(pa, p1, pem, pep, true, false, j1pmtop);
// }
// // Lower current calculations
// // if b is a quark
// if (bptype > 0) {
// joi(p2, true, pb, true, j2ptop);
// joi(p2, false, pb, false, j2mtop);
// }
// // if b is an antiquark
// else {
// jio(pb, true, p2, true, j2ptop);
// jio(pb, false, p2, false, j2mtop);
// }
// // Currents for bottom emission
// // Lower current calculations
// if (bptype > 0) {
// jZ(pb, p2, pem, pep, true, true, j1ppbot);
// jZ(pb, p2, pem, pep, true, false, j1pmbot);
// }
// else {
// jZbar(pb, p2, pem, pep, true, true, j1ppbot);
// jZbar(pb, p2, pem, pep, true, false, j1pmbot);
// }
// // Upper current calculations
// if (aptype > 0) {
// joi(p1, true, pa, true, j2pbot);
// joi(p1, false, pa, false, j2mbot);
// }
// else {
// jio(pa, true, p1, true, j2pbot);
// jio(pa, false, p1, false, j2mbot);
// }
// COM Coeff[2][8];
// if (!Interference) {
// double ZCharge_a_P = Zq(aptype, true);
// double ZCharge_a_M = Zq(aptype, false);
// double ZCharge_b_P = Zq(bptype, true);
// double ZCharge_b_M = Zq(bptype, false);
// if (BottomLineEmit) {
// // Emission from top-line quark (pa/p1 line)
// Coeff[0][0] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2ptop);
// Coeff[0][1] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2mtop);
// Coeff[0][2] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2ptop);
// Coeff[0][3] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2mtop);
// Coeff[0][4] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2ptop));
// Coeff[0][5] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2mtop));
// Coeff[0][6] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2ptop));
// Coeff[0][7] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2mtop));
// }
// else {
// // Emission from bottom-line quark (pb/p2 line)
// Coeff[1][0] = (ZCharge_b_P * Zep * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1ppbot, j2pbot);
// Coeff[1][7] = (ZCharge_b_P * Zep * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1ppbot, j2mbot);
// Coeff[1][2] = (ZCharge_b_P * Zem * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1pmbot, j2pbot);
// Coeff[1][5] = (ZCharge_b_P * Zem * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1pmbot, j2mbot);
// Coeff[1][4] = (ZCharge_b_M * Zem * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1ppbot, j2pbot));
// Coeff[1][3] = (ZCharge_b_M * Zem * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1ppbot, j2mbot));
// Coeff[1][6] = (ZCharge_b_M * Zep * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1pmbot, j2pbot));
// Coeff[1][1] = (ZCharge_b_M * Zep * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1pmbot, j2mbot));
// }
// }
// // Else calculate all the possiblities
// else {
// double ZCharge_a_P = Zq(aptype, true);
// double ZCharge_a_M = Zq(aptype, false);
// double ZCharge_b_P = Zq(bptype, true);
// double ZCharge_b_M = Zq(bptype, false);
// // Emission from top-line quark (pa/p1 line)
// Coeff[0][0] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2ptop);
// Coeff[0][1] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2mtop);
// Coeff[0][2] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2ptop);
// Coeff[0][3] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2mtop);
// Coeff[0][4] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2ptop));
// Coeff[0][5] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2mtop));
// Coeff[0][6] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2ptop));
// Coeff[0][7] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2mtop));
// // Emission from bottom-line quark (pb/p2 line)
// Coeff[1][0] = (ZCharge_b_P * Zep * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1ppbot, j2pbot);
// Coeff[1][7] = (ZCharge_b_P * Zep * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1ppbot, j2mbot);
// Coeff[1][2] = (ZCharge_b_P * Zem * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1pmbot, j2pbot);
// Coeff[1][5] = (ZCharge_b_P * Zem * PZs * RWeak + Gq(bptype) * PGs) * cdot(j1pmbot, j2mbot);
// Coeff[1][4] = (ZCharge_b_M * Zem * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1ppbot, j2pbot));
// Coeff[1][3] = (ZCharge_b_M * Zem * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1ppbot, j2mbot));
// Coeff[1][6] = (ZCharge_b_M * Zep * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1pmbot, j2pbot));
// Coeff[1][1] = (ZCharge_b_M * Zep * PZs * RWeak + Gq(bptype) * PGs) * conj(cdot(j1pmbot, j2mbot));
// }
// // Find the numbers of scales
// int ScaleCount;
// #if calcscaleunc
// ScaleCount = 20;
// #else
// ScaleCount = 1;
// #endif
// // For each scale...
// for (int j = 0; j < ScaleCount; j++) {
// Sum = 0.0;
// // If we want to compare back to the W's code only emit from one quark and only couple to left handed particles
// // virtuals arent here since they are calculated and included in weight() call.
// if (!Interference) {
// if (BottomLineEmit) for (int i = 0; i < 8; i++) Sum += abs2(Coeff[1][i]) * VProducts.at(1);
// else for (int i = 0; i < 8; i++) Sum += abs2(Coeff[0][i]) * VProducts.at(0);
// }
// // Else work out the full interference
// else {
// // For the full calculation...
// if (UseVirtuals) {
// for (int i = 0; i < 8; i++) {
// Sum += abs2(Coeff[0][i]) * VProducts.at(0) * Virtuals.at(j).at(0)
// + abs2(Coeff[1][i]) * VProducts.at(1) * Virtuals.at(j).at(1)
// + 2.0 * real(Coeff[0][i] * conj(Coeff[1][i])) * VProducts.at(2) * Virtuals.at(j).at(2);
// }
// }
// // For the tree level calculation...
// else {
// for (int i = 0; i < 8; i++) {
// Sum += abs2(Coeff[0][i]) * VProducts.at(0)
// + abs2(Coeff[1][i]) * VProducts.at(1)
// + 2.0 * real(Coeff[0][i] * conj(Coeff[1][i])) * VProducts.at(2);
// }
// }
// }
// // Add this to the vector to be returned with the other factors of C_A and the helicity sum/average factors.
// ScaledWeights.push_back(Sum / 18.0);
// }
// // Return all the scale values
// return ScaledWeights;
// }
// // Semi-gluonic with pa emitting
// std::vector <double> jMZqg (HLV pa, HLV pb, HLV p1, HLV p2, HLV pep, HLV pem, std::vector <double> VProducts, std::vector < std::vector <double> > Virtuals, int aptype, int bptype, bool UseVirtuals, bool BottomLineEmit) {
// COM Coeff[8];
// double Sum;
// std::vector <double> ScaledWeights;
// COM PZs = PZ((pep + pem).m2());
// COM PGs = PG((pep + pem).m2());
// // Emitting current initialisation - Emission from top line
// current j1pptop, j1pmtop;
// // Non-emitting current initialisation - Emission from top line
// current j2ptop, j2mtop;
// // Currents for top emission
// // Upper current calculations
// if (aptype > 0) {
// jZ (pa, p1, pem, pep, true, true, j1pptop);
// jZ (pa, p1, pem, pep, true, false, j1pmtop);
// }
// else {
// jZbar(pa, p1, pem, pep, true, true, j1pptop);
// jZbar(pa, p1, pem, pep, true, false, j1pmtop);
// }
// // Lower current calculations
// joi(p2, true, pb, true, j2ptop);
// joi(p2, false, pb, false, j2mtop);
// // Calculate all the possiblities
// double ZCharge_a_P = Zq(aptype, true);
// double ZCharge_a_M = Zq(aptype, false);
// // Emission from top-line quark (pa/p1 line)
// Coeff[0] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2ptop);
// Coeff[1] = (ZCharge_a_P * Zep * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pptop, j2mtop);
// Coeff[2] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2ptop);
// Coeff[3] = (ZCharge_a_P * Zem * PZs * RWeak + Gq(aptype) * PGs) * cdot(j1pmtop, j2mtop);
// Coeff[4] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2ptop));
// Coeff[5] = (ZCharge_a_M * Zem * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pptop, j2mtop));
// Coeff[6] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2ptop));
// Coeff[7] = (ZCharge_a_M * Zep * PZs * RWeak + Gq(aptype) * PGs) * conj(cdot(j1pmtop, j2mtop));
// // Calculate gluon colour accelerated factor
// double CAMFactor, z;
// // If b is a forward moving gluon define z (C.F. multiple jets papers)
// if (pb.pz() > 0) z = p2.plus() / pb.plus();
// else z = p2.minus() / pb.minus();
// CAMFactor = (1.0 - 1.0 / 9.0) / 2.0 * (z + 1.0 / z) + 1.0 / 9.0;
// // Find the numbers of scales
// int ScaleCount;
// #if calcscaleunc
// ScaleCount = 20;
// #else
// ScaleCount = 1;
// #endif
// // For each scale...
// for (int j = 0; j < ScaleCount; j++) {
// Sum = 0.0;
// // If we dont want the interference
// if (!Interference) for (int i = 0; i < 8; i++) Sum += abs2(Coeff[i]) * VProducts.at(0);
// // Else work out the full interference
// else {
// if (UseVirtuals) {
// for (int i = 0; i < 8; i++) Sum += abs2(Coeff[i]) * VProducts.at(0) * Virtuals.at(j).at(0);
// }
// else {
// for (int i = 0; i < 8; i++) Sum += abs2(Coeff[i]) * VProducts.at(0);
// }
// }
// // Add this to the vector to be returned with the other factors of C_A, the colour accelerated factor and the helicity sum/average factors.: (4/3)*3/32
// ScaledWeights.push_back(CAMFactor * Sum / 8.0);
// }
// return ScaledWeights;
// }
// // Electroweak Charge Functions
// double Zq (int PID, bool Helcitiy) {
// double temp;
// // Positive Spin
// if (Helcitiy == true) {
// if (PID == 1 || PID == 3 || PID == 5) temp = (+ 1.0 * stw2 / 3.0) / ctw;
// if (PID == 2 || PID == 4) temp = (- 2.0 * stw2 / 3.0) / ctw;
// if (PID == -1 || PID == -3 || PID == -5) temp = (- 1.0 * stw2 / 3.0) / ctw;
// if (PID == -2 || PID == -4) temp = (+ 2.0 * stw2 / 3.0) / ctw;
// // If electron or positron
// if (PID == 7 || PID == -7) temp = Zep;
// }
// // Negative Spin
// else {
// if (PID == 1 || PID == 3 || PID == 5) temp = (-0.5 + 1.0 * stw2 / 3.0) / ctw;
// if (PID == 2 || PID == 4) temp = ( 0.5 - 2.0 * stw2 / 3.0) / ctw;
// if (PID == -1 || PID == -3 || PID == -5) temp = ( 0.5 - 1.0 * stw2 / 3.0) / ctw;
// if (PID == -2 || PID == -4) temp = (-0.5 + 2.0 * stw2 / 3.0) / ctw;
// // If electron or positron
// if (PID == 7 || PID == -7) temp = Zem;
// }
// return temp;
// }
// double Gq (int PID) {
// if (!VirtualPhoton) return 0.0;
// if (PID == -1) return 1.0 * ee / 3.0;
// if (PID == -2) return -2.0 * ee / 3.0;
// if (PID == -3) return 1.0 * ee / 3.0;
// if (PID == -4) return -2.0 * ee / 3.0;
// if (PID == -5) return 1.0 * ee / 3.0;
// if (PID == 1) return -1.0 * ee / 3.0;
// if (PID == 2) return 2.0 * ee / 3.0;
// if (PID == 3) return -1.0 * ee / 3.0;
// if (PID == 4) return 2.0 * ee / 3.0;
// if (PID == 5) return -1.0 * ee / 3.0;
// std::cout << "ERROR! No Electroweak Charge Found at line " << __LINE__ << "..." << std::endl;
// return 0.0;
// }
CCurrent jH (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pin, bool helin, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
CCurrent j2 = j(pout,helout,pin,helin);
CCurrent jq2(q2.e(),q2.px(),q2.py(),q2.pz());
if(mt == infinity)
return ((q1.dot(q2))*j2 - j2.dot(q1)*jq2)/(3*M_PI*v);
else
{
if(incBot)
return (-16.*M_PI*mb*mb/v*j2.dot(q1)*jq2*A1(-q1,q2,mb)-16.*M_PI*mb*mb/v*j2*A2(-q1,q2,mb)) + (-16.*M_PI*mt*mt/v*j2.dot(q1)*jq2*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j2*A2(-q1,q2,mt));
else
return (-16.*M_PI*mt*mt/v*j2.dot(q1)*jq2*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j2*A2(-q1,q2,mt));
}
}
CCurrent jioH (CLHEP::HepLorentzVector pin, bool helin, CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
CCurrent j2 = jio(pin,helin,pout,helout);
CCurrent jq2(q2.e(),q2.px(),q2.py(),q2.pz());
if(mt == infinity)
return ((q1.dot(q2))*j2 - j2.dot(q1)*jq2)/(3*M_PI*v);
else
{
if(incBot)
return (-16.*M_PI*mb*mb/v*j2.dot(q1)*jq2*A1(-q1,q2,mb)-16.*M_PI*mb*mb/v*j2*A2(-q1,q2,mb)) + (-16.*M_PI*mt*mt/v*j2.dot(q1)*jq2*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j2*A2(-q1,q2,mt));
else
return (-16.*M_PI*mt*mt/v*j2.dot(q1)*jq2*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j2*A2(-q1,q2,mt));
}
}
CCurrent jHtop (CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector pin, bool helin, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
CCurrent j1 = j(pout,helout,pin,helin);
CCurrent jq1(q1.e(),q1.px(),q1.py(),q1.pz());
if(mt == infinity)
return ((q1.dot(q2))*j1 - j1.dot(q2)*jq1)/(3*M_PI*v);
else
{
if(incBot)
return (-16.*M_PI*mb*mb/v*j1.dot(q2)*jq1*A1(-q1,q2,mb)-16.*M_PI*mb*mb/v*j1*A2(-q1,q2,mb)) + (-16.*M_PI*mt*mt/v*j1.dot(q2)*jq1*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j1*A2(-q1,q2,mt));
else
return (-16.*M_PI*mt*mt/v*j1.dot(q2)*jq1*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j1*A2(-q1,q2,mt));
}
}
CCurrent jioHtop (CLHEP::HepLorentzVector pin, bool helin, CLHEP::HepLorentzVector pout, bool helout, CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mt, bool incBot, double mb)
{
CCurrent j1 = jio(pin,helin,pout,helout);
CCurrent jq1(q1.e(),q1.px(),q1.py(),q1.pz());
if(mt == infinity)
return ((q1.dot(q2))*j1 - j1.dot(q2)*jq1)/(3*M_PI*v);
else
{
if(incBot)
return (-16.*M_PI*mb*mb/v*j1.dot(q2)*jq1*A1(-q1,q2,mb)-16.*M_PI*mb*mb/v*j1*A2(-q1,q2,mb)) + (-16.*M_PI*mt*mt/v*j1.dot(q2)*jq1*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j1*A2(-q1,q2,mt));
else
return (-16.*M_PI*mt*mt/v*j1.dot(q2)*jq1*A1(-q1,q2,mt)-16.*M_PI*mt*mt/v*j1*A2(-q1,q2,mt));
}
}
double jM2unogqHQ (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=j(p1out,true,p1in,true);
mj1m=j(p1out,false,p1in,false);
mjH2p=jH(p2out,true,p2in,true,qH1,qH2, mt, incBot, mb);
mjH2m=jH(p2out,false,p2in,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// std::cout<< p1out.rapidity() << " " << p2out.rapidity()<< " " << qH1 << " " << qH2 << "\n" <<MHmm << " " << MHmp << " " << MHpm << " " << MHpp << std::endl;
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(p1out,true,pg,true);
j2gm=joo(p1out,false,pg,false);
jgap=j(pg,true,p1in,true);
jgam=j(pg,false,p1in,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unogqbarHQ (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=jio(p1in,true,p1out,true);
mj1m=jio(p1in,false,p1out,false);
mjH2p=jH(p2out,true,p2in,true,qH1,qH2, mt, incBot, mb);
mjH2m=jH(p2out,false,p2in,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(pg,true,p1out,true);
j2gm=joo(pg,false,p1out,false);
jgap=jio(p1in,true,pg,true);
jgam=jio(p1in,false,pg,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unogqHQbar (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=j(p1out,true,p1in,true);
mj1m=j(p1out,false,p1in,false);
mjH2p=jioH(p2in,true,p2out,true,qH1,qH2, mt, incBot, mb);
mjH2m=jioH(p2in,false,p2out,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(p1out,true,pg,true);
j2gm=joo(p1out,false,pg,false);
jgap=j(pg,true,p1in,true);
jgam=j(pg,false,p1in,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unogqbarHQbar (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=jio(p1in,true,p1out,true);
mj1m=jio(p1in,false,p1out,false);
mjH2p=jioH(p2in,true,p2out,true,qH1,qH2, mt, incBot, mb);
mjH2m=jioH(p2in,false,p2out,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(pg,true,p1out,true);
j2gm=joo(pg,false,p1out,false);
jgap=jio(p1in,true,pg,true);
jgam=jio(p1in,false,pg,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
//Higgs coupling is included in Hjets.C
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
return ampsq;
}
double jM2unogqHg (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=j(p1out,true,p1in,true);
mj1m=j(p1out,false,p1in,false);
mjH2p=jH(p2out,true,p2in,true,qH1,qH2, mt, incBot, mb);
mjH2m=jH(p2out,false,p2in,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(p1out,true,pg,true);
j2gm=joo(p1out,false,pg,false);
jgap=j(pg,true,p1in,true);
jgam=j(pg,false,p1in,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4./9.*4./9.; // Factor of (Cf/Ca) for each quark to match MH2qQ.
// here we need 2 to match with the normalization
// gq is 9./4. times the qQ
//Higgs coupling is included in Hjets.C
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
return ampsq*nonflipcolourmult*9./4.; //ca/cf = 9/4
}
double jM2unogqbarHg (CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// This construction is taking rapidity order: pg > p1out >> p2out
// std::cerr<<"This Uno Current: "<<p1out<<" "<<p1in<<" "<<p2out<<" "<<p2in<<" "<<pg<<std::endl;
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out); // Bottom End
CLHEP::HepLorentzVector qg=p1in-p1out-pg; // Extra bit post-gluon
CCurrent mj1m,mj1p,mj2m,mj2p,mjH2m,mjH2p;
mj1p=jio(p1in,true,p1out,true);
mj1m=jio(p1in,false,p1out,false);
mjH2p=jH(p2out,true,p2in,true,qH1,qH2, mt, incBot, mb);
mjH2m=jH(p2out,false,p2in,false,qH1,qH2, mt, incBot, mb);
// Dot products of these which occur again and again
COM MHmp=mj1m.dot(mjH2p); // And now for the Higgs ones
COM MHmm=mj1m.dot(mjH2m);
COM MHpp=mj1p.dot(mjH2p);
COM MHpm=mj1p.dot(mjH2m);
// Currents with pg
CCurrent jgam,jgap,j2gm,j2gp;
j2gp=joo(pg,true,p1out,true);
j2gm=joo(pg,false,p1out,false);
jgap=jio(p1in,true,pg,true);
jgam=jio(p1in,false,pg,false);
CCurrent qsum(q1+qg);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p2o(p2out),p2i(p2in);
CCurrent p1o(p1out);
CCurrent p1i(p1in);
Lmm=(qsum*(MHmm) + (-2.*mjH2m.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmm/2.))/q1.m2();
Lmp=(qsum*(MHmp) + (-2.*mjH2p.dot(pg))*mj1m+2.*mj1m.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHmp/2.))/q1.m2();
Lpm=(qsum*(MHpm) + (-2.*mjH2m.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2m+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpm/2.))/q1.m2();
Lpp=(qsum*(MHpp) + (-2.*mjH2p.dot(pg))*mj1p+2.*mj1p.dot(pg)*mjH2p+(p2o/pg.dot(p2out) + p2i/pg.dot(p2in))*(qg.m2()*MHpp/2.))/q1.m2();
U1mm=(jgam.dot(mjH2m)*j2gm+2.*p1o*MHmm)/(p1out+pg).m2();
U1mp=(jgam.dot(mjH2p)*j2gm+2.*p1o*MHmp)/(p1out+pg).m2();
U1pm=(jgap.dot(mjH2m)*j2gp+2.*p1o*MHpm)/(p1out+pg).m2();
U1pp=(jgap.dot(mjH2p)*j2gp+2.*p1o*MHpp)/(p1out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH2m)*jgam+2.*p1i*MHmm)/(p1in-pg).m2();
U2mp=((-1.)*j2gm.dot(mjH2p)*jgam+2.*p1i*MHmp)/(p1in-pg).m2();
U2pm=((-1.)*j2gp.dot(mjH2m)*jgap+2.*p1i*MHpm)/(p1in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH2p)*jgap+2.*p1i*MHpp)/(p1in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q2.m2()*qH2.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH1.m2()*qg.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4./9.*4./9.; // Factor of (Cf/Ca) for each quark to match MH2qQ.
// here we need 2 to match with the normalization
// gq is 9./4. times the qQ
//Higgs coupling is included in Hjets.C
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p2in.pz()>0) // if the gluon is the positive
ratio=p2out.plus()/p2in.plus();
else // the gluon is the negative
ratio=p2out.minus()/p2in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
return ampsq*nonflipcolourmult*9./4.; //ca/cf = 9/4
}
double jM2unobqHQg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// std::cout << "####################\n";
// std::cout << "# p1in : "<<p1in<< " "<<p1in.plus()<<" "<<p1in.minus()<<std::endl;
// std::cout << "# p2in : "<<p2in<< " "<<p2in.plus()<<" "<<p2in.minus()<<std::endl;
// std::cout << "# p1out : "<<p1out<< " "<<p1out.rapidity()<<std::endl;
// std::cout << "# (qH1-qH2) : "<<(qH1-qH2)<< " "<<(qH1-qH2).rapidity()<<std::endl;
// std::cout << "# pg : "<<pg<< " "<<pg.rapidity()<<std::endl;
// std::cout << "# p2out : "<<p2out<< " "<<p2out.rapidity()<<std::endl;
// std::cout << "####################\n";
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jHtop(p1out,true,p1in,true,qH1,qH2, mt, incBot, mb);
mjH1m=jHtop(p1out,false,p1in,false,qH1,qH2, mt, incBot, mb);
mj2p=j(p2out,true,p2in,true);
mj2m=j(p2out,false,p2in,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(p2out,true,pg,true);
j2gm=joo(p2out,false,pg,false);
jgbp=j(pg,true,p2in,true);
jgbm=j(pg,false,p2in,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
return ampsq;
}
double jM2unobqbarHQg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jioHtop(p1in,true,p1out,true,qH1,qH2, mt, incBot, mb);
mjH1m=jioHtop(p1in,false,p1out,false,qH1,qH2, mt, incBot, mb);
mj2p=j(p2out,true,p2in,true);
mj2m=j(p2out,false,p2in,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(p2out,true,pg,true);
j2gm=joo(p2out,false,pg,false);
jgbp=j(pg,true,p2in,true);
jgbm=j(pg,false,p2in,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unobqHQbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jHtop(p1out,true,p1in,true,qH1,qH2,mt, incBot, mb);
mjH1m=jHtop(p1out,false,p1in,false,qH1,qH2,mt, incBot, mb);
mj2p=jio(p2in,true,p2out,true);
mj2m=jio(p2in,false,p2out,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(pg,true,p2out,true);
j2gm=joo(pg,false,p2out,false);
jgbp=jio(p2in,true,pg,true);
jgbm=jio(p2in,false,pg,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unobqbarHQbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jioHtop(p1in,true,p1out,true,qH1,qH2,mt, incBot, mb);
mjH1m=jioHtop(p1in,false,p1out,false,qH1,qH2,mt, incBot, mb);
mj2p=jio(p2in,true,p2out,true);
mj2m=jio(p2in,false,p2out,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(pg,true,p2out,true);
j2gm=joo(pg,false,p2out,false);
jgbp=jio(p2in,true,pg,true);
jgbm=jio(p2in,false,pg,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4.*4./(9.*9.); // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
return ampsq;
}
double jM2unobgHQg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
// std::cout << "####################\n";
// std::cout << "# p1in : "<<p1in<< " "<<p1in.plus()<<" "<<p1in.minus()<<std::endl;
// std::cout << "# p2in : "<<p2in<< " "<<p2in.plus()<<" "<<p2in.minus()<<std::endl;
// std::cout << "# p1out : "<<p1out<< " "<<p1out.rapidity()<<std::endl;
// std::cout << "# (qH1-qH2) : "<<(qH1-qH2)<< " "<<(qH1-qH2).rapidity()<<std::endl;
// std::cout << "# pg : "<<pg<< " "<<pg.rapidity()<<std::endl;
// std::cout << "# p2out : "<<p2out<< " "<<p2out.rapidity()<<std::endl;
// std::cout << "####################\n";
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jHtop(p1out,true,p1in,true,qH1,qH2,mt, incBot, mb);
mjH1m=jHtop(p1out,false,p1in,false,qH1,qH2,mt, incBot, mb);
mj2p=j(p2out,true,p2in,true);
mj2m=j(p2out,false,p2in,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(p2out,true,pg,true);
j2gm=joo(p2out,false,pg,false);
jgbp=j(pg,true,p2in,true);
jgbm=j(pg,false,p2in,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4./9.*4./9.; // Factor of (Cf/Ca) for each quark to match MH2qQ.
// need twice to match the normalization
//Higgs coupling is included in Hjets.C
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p1in.pz()>0) // if the gluon is the positive
ratio=p1out.plus()/p1in.plus();
else // the gluon is the negative
ratio=p1out.minus()/p1in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
return ampsq*nonflipcolourmult*9./4.; //ca/cf = 9/4
}
double jM2unobgHQbarg (CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector pg, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector qH1, CLHEP::HepLorentzVector qH2, double mt, bool incBot, double mb)
{
CLHEP::HepLorentzVector q1=p1in-p1out; // Top End
CLHEP::HepLorentzVector q2=-(p2in-p2out-pg); // Extra bit pre-gluon
CLHEP::HepLorentzVector q3=-(p2in-p2out); // Bottom End
// std::cerr<<"Current: "<<q1.m2()<<" "<<q2.m2()<<std::endl;
CCurrent mjH1m,mjH1p,mj2m,mj2p;
mjH1p=jHtop(p1out,true,p1in,true,qH1,qH2,mt, incBot, mb);
mjH1m=jHtop(p1out,false,p1in,false,qH1,qH2,mt, incBot, mb);
mj2p=jio(p2in,true,p2out,true);
mj2m=jio(p2in,false,p2out,false);
// Dot products of these which occur again and again
COM MHmp=mjH1m.dot(mj2p); // And now for the Higgs ones
COM MHmm=mjH1m.dot(mj2m);
COM MHpp=mjH1p.dot(mj2p);
COM MHpm=mjH1p.dot(mj2m);
// Currents with pg
CCurrent jgbm,jgbp,j2gm,j2gp;
j2gp=joo(pg,true,p2out,true);
j2gm=joo(pg,false,p2out,false);
jgbp=jio(p2in,true,pg,true);
jgbm=jio(p2in,false,pg,false);
CCurrent qsum(q2+q3);
CCurrent Lmp,Lmm,Lpp,Lpm,U1mp,U1mm,U1pp,U1pm,U2mp,U2mm,U2pp,U2pm,p1o(p1out),p1i(p1in);
CCurrent p2o(p2out);
CCurrent p2i(p2in);
CCurrent pplus((p1in+p1out)/2.);
CCurrent pminus((p2in+p2out)/2.);
// COM test=pminus.dot(p1in);
Lmm=((-1.)*qsum*(MHmm) + (-2.*mjH1m.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmm/2.))/q3.m2();
Lmp=((-1.)*qsum*(MHmp) + (-2.*mjH1m.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1m+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHmp/2.))/q3.m2();
Lpm=((-1.)*qsum*(MHpm) + (-2.*mjH1p.dot(pg))*mj2m+2.*mj2m.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpm/2.))/q3.m2();
Lpp=((-1.)*qsum*(MHpp) + (-2.*mjH1p.dot(pg))*mj2p+2.*mj2p.dot(pg)*mjH1p+(p1o/pg.dot(p1out) + p1i/pg.dot(p1in))*(q2.m2()*MHpp/2.))/q3.m2();
U1mm=(jgbm.dot(mjH1m)*j2gm+2.*p2o*MHmm)/(p2out+pg).m2();
U1mp=(jgbp.dot(mjH1m)*j2gp+2.*p2o*MHmp)/(p2out+pg).m2();
U1pm=(jgbm.dot(mjH1p)*j2gm+2.*p2o*MHpm)/(p2out+pg).m2();
U1pp=(jgbp.dot(mjH1p)*j2gp+2.*p2o*MHpp)/(p2out+pg).m2();
U2mm=((-1.)*j2gm.dot(mjH1m)*jgbm+2.*p2i*MHmm)/(p2in-pg).m2();
U2mp=((-1.)*j2gp.dot(mjH1m)*jgbp+2.*p2i*MHmp)/(p2in-pg).m2();
U2pm=((-1.)*j2gm.dot(mjH1p)*jgbm+2.*p2i*MHpm)/(p2in-pg).m2();
U2pp=((-1.)*j2gp.dot(mjH1p)*jgbp+2.*p2i*MHpp)/(p2in-pg).m2();
double cf=4./3.;
double amm,amp,apm,app;
amm=cf*(2.*vre(Lmm-U1mm,Lmm+U2mm))+2.*cf*cf/3.*vabs2(U1mm+U2mm);
amp=cf*(2.*vre(Lmp-U1mp,Lmp+U2mp))+2.*cf*cf/3.*vabs2(U1mp+U2mp);
apm=cf*(2.*vre(Lpm-U1pm,Lpm+U2pm))+2.*cf*cf/3.*vabs2(U1pm+U2pm);
app=cf*(2.*vre(Lpp-U1pp,Lpp+U2pp))+2.*cf*cf/3.*vabs2(U1pp+U2pp);
double ampsq=-(amm+amp+apm+app)/(q1.m2()*qH1.m2());
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) > 1.0000001)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// if ((vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm))/(2*vre(Lmm-U1mm,Lmm+U2mm)) < 0.9999999)
// std::cout << " Big Problem!! " << vabs2(Lmm-U1mm+U2mm)+vabs2(Lmm)-vabs2(U1mm)-vabs2(U2mm) << " " << 2*vre(Lmm-U1mm,Lmm+U2mm) << std::endl;
// Now add the t-channels for the Higgs
double th=qH2.m2()*q2.m2();
ampsq/=th;
ampsq/=16.;
ampsq*=4./9.*4./9.; // Factor of (Cf/Ca) for each quark to match MH2qQ.
//Higgs coupling is included in Hjets.C
double ratio; // p2-/pb- in the notes
// if (p2in.plus()>0) // if the gluon is the positive
if (p1in.pz()>0) // if the gluon is the positive
ratio=p1out.plus()/p1in.plus();
else // the gluon is the negative
ratio=p1out.minus()/p1in.minus();
double nonflipcolourmult=(1.-1./9.)/2.*(ratio+1./ratio)+1./9.;
return ampsq*nonflipcolourmult*9./4.; //ca/cf = 9/4
}
// Begin finite mass stuff
-#ifdef USE_LT
+#ifdef RHEJ_BUILD_WITH_LT
// All the stuff needed for the box functions in qg->qgH now...
//COM E1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM E1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2=-(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor*(-s12*D0DD(k2, k1, q2, mq)*(1 - 8.*mq*mq/s12 + S2/(2.*s12) +
S2*(s12 - 8.*mq*mq)*(s34 + S1)/(2.*s12*Delta) +
2.*(s34 + S1)*(s34 + S1)/Delta +
S2*pow((s34 + S1),3)/Delta/Delta) - ((s12 + S2)*C0DD(k2,
k1 + q2, mq) -
s12*C0DD(k1, k2, mq) + (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S1*C0DD(k1, q2,
mq))*(S2*(s12 - 4.*mq*mq)/(2.*s12*Delta) +
2.*(s34 + S1)/Delta +
S2*pow((s34 + S1),2)/Delta/Delta) + (C0DD(k1, q2, mq) -
C0DD(k1 + k2, q2, mq))*(1. - 4.*mq*mq/s12) -
C0DD(k1 + k2, q2, mq)*2.*s34/
S1 - (B0DD(k1 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*2.*s34*(s34 +
S1)/(S1*Delta) + (B0DD(q2, mq) -
B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2,
mq))*(2.*s34*(s34 +
S1)*(S1 - S2)/(Delta*Sigma) +
2.*s34*(s34 + S1)/(S1*Delta)) + (B0DD(k1 + k2, mq) -
B0DD(k1 + k2 + q2,
mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2, mq))*2.*(s34 +
S1)*(2.*s12*s34 -
S2*(S1 + S2))/(Delta*Sigma));
}
//COM F1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM F1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor*(-S2*D0DD(k1, k2, q2,
mq)*(0.5 - (s12 - 8.*mq*mq)*(s34 + S2)/(2.*Delta) -
s12*pow((s34 + S2),3)/Delta/Delta) + ((s12 + S1)*C0DD(k1,
k2 + q2, mq) -
s12*C0DD(k1, k2, mq) - (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S2*C0DD(k2, q2,
mq))*(S2*(s12 - 4.*mq*mq)/(2.*s12*Delta) +
S2*pow((s34 + S2),2)/Delta/Delta) - (C0DD(k1 + k2, q2, mq) - C0DD(k1, k2 + q2, mq))*(1. - 4.*mq*mq/s12) -
C0DD(k1, k2 + q2, mq) + (B0DD(k2 + q2, mq) -
B0DD(k1 + k2 + q2,
mq))*2.*pow((s34 + S2),2)/((s12 + S1)*Delta) - (B0DD(
q2, mq) - B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2, mq))*2.*s34*(s34 +
S2)*(S2 - S1)/(Delta*Sigma) + (B0DD(
k1 + k2, mq) -
B0DD(k1 + k2 + q2,
mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2, mq))*2.*(s34 +
S2)*(2.*s12*s34 -
S2*(S1 + S2))/(Delta*Sigma));
}
//COM G1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM G1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
return looprwfactor*(S2*D0DD(k1, q2, k2,
mq)*(Delta/s12/s12 - 4.*mq*mq/s12) -
S2*((s12 + S1)*C0DD(k1, k2 + q2, mq) -
S1*C0DD(k1, q2, mq))*(1./
s12/s12 - (s12 - 4.*mq*mq)/(2.*s12*Delta)) -
S2*((s12 + S2)*C0DD(k1 + q2, k2, mq) -
S2*C0DD(k2, q2, mq))*(1./
s12/s12 + (s12 - 4.*mq*mq)/(2.*s12*Delta)) -
C0DD(k1, q2, mq) - (C0DD(k1, k2 + q2, mq) -
C0DD(k1, q2, mq))*4.*mq*mq/
s12 + (B0DD(k1 + q2, mq) - B0DD(k1 + k2 + q2, mq))*2./
s12 + (B0DD(k1 + q2, mq) -
B0DD(q2, mq))*2.*s34/(s12*S1) + (B0DD(k2 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*2.*(s34 + S2)/(s12*(s12 + S1)));
}
//COM E4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM E4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor* (-s12*D0DD(k2, k1, q2,
mq)*(0.5 - (S1 - 8.*mq*mq)*(s34 + S1)/(2.*Delta) -
s12*pow((s34 + S1),3)/Delta/Delta) + ((s12 + S2)*C0DD(k2,
k1 + q2, mq) -
s12*C0DD(k1, k2, mq) + (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S1*C0DD(k1, q2, mq))*((S1 - 4.*mq*mq)/(2.*Delta) +
s12*pow((s34 + S1),2)/Delta/Delta) -
C0DD(k1 + k2, q2, mq) + (B0DD(k1 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*(2.*s34/Delta +
2.*s12*(s34 + S1)/((s12 + S2)*Delta)) - (B0DD(
q2, mq) - B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2,
mq))*((2.*s34*(2.*s12*s34 - S2*(S1 + S2) +
s12*(S1 -
S2)))/(Delta*Sigma)) + (B0DD(k1 + k2, mq) -
B0DD(k1 + k2 + q2, mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2, mq))*((2.*s12*(2.*s12*s34 - S1*(S1 + S2) +
s34*(S2 - S1)))/(Delta*Sigma)));
}
//COM F4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM F4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor* (-s12*D0DD(k1, k2, q2,
mq)*(0.5 + (S1 - 8.*mq*mq)*(s34 + S2)/(2.*Delta) +
s12*pow((s34 + S2),3)/Delta/Delta) - ((s12 + S1)*C0DD(k1,
k2 + q2, mq) -
s12*C0DD(k1, k2, mq) - (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S2*C0DD(k2, q2, mq))*((S1 - 4.*mq*mq)/(2.*Delta) +
s12*pow((s34 + S2),2)/Delta/Delta) -
C0DD(k1 + k2, q2, mq) - (B0DD(k2 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*2.*(s34 +
S2)/Delta + (B0DD(q2, mq) -
B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2, mq))*2.*s34*(2.*s12*s34 -
S1*(S1 + S2) +
s12*(S2 - S1))/(Delta*Sigma) - (B0DD(k1 + k2, mq) -
B0DD(k1 + k2 + q2, mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2, mq))*(2.*s12*(2.*s12*s34 - S2*(S1 + S2) +
s34*(S1 - S2))/(Delta*Sigma)));
}
//COM G4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM G4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
return looprwfactor* (-D0DD(k1, q2, k2,
mq)*(Delta/s12 + (s12 + S1)/2. -
4.*mq*mq) + ((s12 + S1)*C0DD(k1, k2 + q2, mq) -
S1*C0DD(k1, q2, mq))*(1./
s12 - (S1 - 4.*mq*mq)/(2.*Delta)) + ((s12 + S2)*C0DD(
k1 + q2, k2, mq) -
S2*C0DD(k2, q2, mq))*(1./
s12 + (S1 - 4.*mq*mq)/(2.*Delta)) + (B0DD(
k1 + k2 + q2, mq) -
B0DD(k1 + q2, mq))*2./(s12 + S2));
}
//COM E10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM E10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor*(-s12*D0DD(k2, k1, q2, mq)*((s34 + S1)/Delta +
12.*mq*mq*S1*(s34 + S1)/Delta/Delta -
4.*s12*S1*pow((s34 + S1),3)/Delta/Delta/Delta) - ((s12 + S2)*C0DD(k2, k1 + q2, mq) -
s12*C0DD(k1, k2, mq) + (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S1*C0DD(k1, q2, mq))*(1./Delta +
4.*mq*mq*S1/Delta/Delta -
4.*s12*S1*pow((s34 + S1),2)/Delta/Delta/Delta) +
C0DD(k1 + k2, q2, mq)*(4.*s12*s34*(S1 - S2)/(Delta*Sigma) -
4.*(s12 -
2.*mq*mq)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma)) + (B0DD(k1 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*(4.*(s34 + S1)/((s12 + S2)*Delta) +
8.*S1*(s34 + S1)/Delta/Delta) + (B0DD(q2, mq) -
B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2, mq))*(12.*s34*(2.*s12 + S1 +
S2)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma*Sigma) -
4.*s34*(4.*s12 + 3.*S1 +
S2)/(Delta*Sigma) +
8.*s12*s34*(s34*(s12 + S2) -
S1*(s34 +
S1))/(Delta*Delta*Sigma)) + (B0DD(k1 + k2, mq) -
B0DD(k1 + k2 + q2, mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2,
mq))*(12.*s12*(2.*s34 + S1 +
S2)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma*Sigma) +
8.*s12*S1*(s34*(s12 + S2) -
S1*(s34 +
S1))/(Delta*Delta*Sigma))) + (COM(0.,1.)/(4.*M_PI*M_PI))*((2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma));
}
//COM F10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM F10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, Sigma, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
Sigma = 4.*s12*s34 - pow(S1+S2,2);
return looprwfactor* (s12*D0DD(k1, k2, q2,
mq)*((s34 + S2)/Delta - 4.*mq*mq/Delta +
12.*mq*mq*s34*(s12 + S1)/Delta/Delta -
4.*s12*pow((s34 + S2),2)/Delta/Delta -
4.*s12*S1*pow((s34 + S2),3)/Delta/Delta/Delta) + ((s12 + S1)*C0DD(k1, k2 + q2, mq) -
s12*C0DD(k1, k2, mq) - (S1 - S2)*C0DD(k1 + k2, q2, mq) -
S2*C0DD(k2, q2, mq))*(1./Delta +
4.*mq*mq*S1/Delta/Delta -
4.*s12*(s34 + S2)/Delta/Delta -
4.*s12*S1*pow((s34 + S2),2)/Delta/Delta/Delta) -
C0DD(k1 + k2, q2, mq)*(4.*s12*s34/(S2*Delta) +
4.*s12*s34*(S2 - S1)/(Delta*Sigma) +
4.*(s12 -
2.*mq*mq)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma)) - (B0DD(
k2 + q2, mq) -
B0DD(k1 + k2 + q2, mq))*(4.*s34/(S2*Delta) +
8.*s34*(s12 + S1)/Delta/Delta) - (B0DD(q2, mq) -
B0DD(k1 + k2 + q2, mq) +
s12*C0DD(k1 + k2, q2,
mq))*(-12*s34*(2*s12 + S1 +
S2)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma*Sigma) -
4.*s12*s34*s34/(S2*Delta*Delta) +
4.*s34*S1/(Delta*Sigma) -
4.*s34*(s12*s34*(2.*s12 + S2) -
S1*S1*(2.*s12 +
S1))/(Delta*Delta*Sigma)) - (B0DD(k1 + k2, mq) -
B0DD(k1 + k2 + q2, mq) - (s34 + S1 + S2)*C0DD(k1 + k2, q2, mq))*(-12.*s12*(2.*s34 + S1 +
S2)*(2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma*Sigma) +
8.*s12*(2.*s34 + S1)/(Delta*Sigma) -
8.*s12*s34*(2.*s12*s34 - S1*(S1 + S2) +
s12*(S2 -
S1))/(Delta*Delta*Sigma))) + (COM(0.,1.)/(4.*M_PI*M_PI))*((2.*s12*s34 -
S1*(S1 + S2))/(Delta*Sigma));
}
//COM G10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM G10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//CLHEP::HepLorentzVector q2=k3+k4;
CLHEP::HepLorentzVector q2 = -(k1+k2+kh);
double Delta, S1, S2, s12, s34;
S1 = 2.*k1.dot(q2);
S2 = 2.*k2.dot(q2);
s12 = 2.*k1.dot(k2);
//s34 = 2.*k3.dot(k4);
s34 = q2.m2();
Delta = s12*s34 - S1*S2;
return looprwfactor* (-D0DD(k1, q2, k2, mq)*(1. +
4.*S1*mq*mq/Delta) + ((s12 + S1)*C0DD(k1,
k2 + q2, mq) -
S1*C0DD(k1, q2, mq))*(1./Delta +
4.*S1*mq*mq/Delta/Delta) - ((s12 + S2)*C0DD(k1 + q2,
k2, mq) - S2*C0DD(k2, q2, mq))*(1./Delta +
4.*S1*mq*mq/Delta/Delta) + (B0DD(k1 + k2 + q2, mq) -
B0DD(k1 + q2, mq))*4.*(s34 +
S1)/(Delta*(s12 + S2)) + (B0DD(q2, mq) -
B0DD(k2 + q2, mq))*4.*s34/(Delta*S2));
}
//COM H1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H1(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return E1(k1,k2,k3,k4,mq)+F1(k1,k2,k3,k4,mq)+G1(k1,k2,k3,k4,mq);
return E1(k1,k2,kh,mq)+F1(k1,k2,kh,mq)+G1(k1,k2,kh,mq);
}
//COM H4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H4(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return E4(k1,k2,k3,k4,mq)+F4(k1,k2,k3,k4,mq)+G4(k1,k2,k3,k4,mq);
return E4(k1,k2,kh,mq)+F4(k1,k2,kh,mq)+G4(k1,k2,kh,mq);
}
//COM H10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H10(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return E10(k1,k2,k3,k4,mq)+F10(k1,k2,k3,k4,mq)+G10(k1,k2,k3,k4,mq);
return E10(k1,k2,kh,mq)+F10(k1,k2,kh,mq)+G10(k1,k2,kh,mq);
}
//COM H2(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H2(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return -1.*H1(k2,k1,k3,k4,mq);
return -1.*H1(k2,k1,kh,mq);
}
//COM H5(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H5(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return -1.*H4(k2,k1,k3,k4,mq);
return -1.*H4(k2,k1,kh,mq);
}
//COM H12(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector k3, CLHEP::HepLorentzVector k4, double mq)
COM H12(CLHEP::HepLorentzVector k1, CLHEP::HepLorentzVector k2, CLHEP::HepLorentzVector kh, double mq)
{
//return -1.*H10(k2,k1,k3,k4,mq);
return -1.*H10(k2,k1,kh,mq);
}
// Now a function to transform a 4-vector into a current object
void momtocurrent(CLHEP::HepLorentzVector mom, current &output)
{
output[0] = mom.e();
output[1] = mom.x();
output[2] = mom.y();
output[3] = mom.z();
}
// FL and FT functions
COM FL(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mq)
{
CLHEP::HepLorentzVector Q = q1 + q2;
double detQ2 = q1.m2()*q2.m2() - q1.dot(q2)*q1.dot(q2);
return -1./(2.*detQ2)*((2.-
3.*q1.m2()*q2.dot(Q)/detQ2)*(B0DD(q1, mq) -
B0DD(Q, mq)) + (2. -
3.*q2.m2()*q1.dot(Q)/detQ2)*(B0DD(q2, mq) -
B0DD(Q, mq)) - (4.*mq*mq + q1.m2() + q2.m2() +
Q.m2() - 3.*q1.m2()*q2.m2()*Q.m2()/detQ2)*C0DD(
q1, q2, mq) - 2.);
}
COM FT(CLHEP::HepLorentzVector q1, CLHEP::HepLorentzVector q2, double mq)
{
CLHEP::HepLorentzVector Q = q1 + q2;
double detQ2 = q1.m2()*q2.m2() - q1.dot(q2)*q1.dot(q2);
return -1./(2.*detQ2)*(Q.m2()*(B0DD(q1, mq) + B0DD(q2, mq) - 2.*B0DD(Q, mq) -
2.*q1.dot(q2)*C0DD(q1, q2, mq)) + (q1.m2() -
q2.m2()) *(B0DD(q1, mq) - B0DD(q2, mq))) -
q1.dot(q2)*FL(q1, q2, mq);
}
CLHEP::HepLorentzVector ParityFlip(CLHEP::HepLorentzVector p)
{
CLHEP::HepLorentzVector flippedVector;
flippedVector.setE(p.e());
flippedVector.setX(-p.x());
flippedVector.setY(-p.y());
flippedVector.setZ(-p.z());
return flippedVector;
}
// HC amp for qg->qgH with finite top
void g_gH_HC(CLHEP::HepLorentzVector pa, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector pH, double mq, current &retAns)
{
current cura1,pacur,p1cur,pHcur,conjeps1,conjepsH1,epsa,epsHa,epsHapart1,epsHapart2,conjepsH1part1,conjepsH1part2;
current T1,T2,T3,T4,T5,T6,T7,T8,T9,T10, ans;
COM ang1a,sqa1,aH1,Fta,Ft1,h4,h5,h10,h12;
double prop;
//cout << mq << endl;
//double F = 4.*mq*mq/v/16./M_PI/M_PI;
double F = 4.*mq*mq/v;
//cout << mq << endl;
//cout << HVE << endl;
// Easier to have the whole thing as current object so I can use cdot functionality.
// Means I need to write pa,p1 as current objects
momtocurrent(pa, pacur);
momtocurrent(p1,p1cur);
momtocurrent(pH,pHcur);
bool gluonforward = true;
if(pa.z() < 0)
gluonforward = false;
//HEJ gauge
jio(pa,false,p1,false,cura1);
if(gluonforward){
ang1a = sqrt(pa.plus()*p1.minus())*(p1.x()+COM(0.,1.)*p1.y())/p1.perp();
sqa1 = sqrt(pa.plus()*p1.minus())*(p1.x()-COM(0.,1.)*p1.y())/p1.perp(); }
else {
ang1a = sqrt(pa.minus()*p1.plus());
sqa1 = sqrt(pa.minus()*p1.plus());
}
prop = (pa-p1-pH).m2();
//double Acheck = 1./(12.*M_PI*M_PI*v);
cmult(-1./sqrt(2)/ang1a,cura1,conjeps1);
cmult(1./sqrt(2)/sqa1,cura1,epsa);
//if(mq<1000.){
Fta = FT(-pa,pa-pH,mq)/(pa-pH).m2();
Ft1 = FT(-p1-pH,p1,mq)/(p1+pH).m2();
//}
//else{
// Fta = -Acheck/(pa-pH).m2()/F;
// Ft1 = -Acheck/(p1+pH).m2()/F;
//}
//if(mq<1000.){
h4 = H4(p1,-pa,pH,mq);
h5 = H5(p1,-pa,pH,mq);
h10 = H10(p1,-pa,pH,mq);
h12 = H12(p1,-pa,pH,mq);
//}
//else{
// h4 = COM(0.,2.)/16./M_PI/M_PI*Acheck/F;
// h5 = COM(0.,-2.)/16./M_PI/M_PI*Acheck/F;
// h10 = 0;
// h12 = 0;
//}
cmult(Fta*pa.dot(pH),epsa,epsHapart1);
cmult(-1.*Fta*cdot(pHcur,epsa),pacur,epsHapart2);
cmult(Ft1*cdot(pHcur,conjeps1),p1cur,conjepsH1part1);
cmult(-Ft1*p1.dot(pH),conjeps1,conjepsH1part2);
cadd(epsHapart1,epsHapart2,epsHa);
cadd(conjepsH1part1,conjepsH1part2,conjepsH1);
aH1 = cdot(pHcur,cura1);
if(gluonforward){
cmult(sqrt(2.)*sqrt(p1.plus()/pa.plus())*prop/sqa1,conjepsH1,T1);
cmult(-sqrt(2.)*sqrt(pa.plus()/p1.plus())*prop/ang1a,epsHa,T2);
}
else{
cmult(-sqrt(2.)*sqrt(p1.minus()/pa.minus())*((p1.x()-COM(0.,1.)*p1.y())/p1.perp())*prop/sqa1,conjepsH1,T1);
cmult(sqrt(2.)*sqrt(pa.minus()/p1.minus())*((p1.x()-COM(0.,1.)*p1.y())/p1.perp())*prop/ang1a,epsHa,T2);
}
cmult(sqrt(2.)/ang1a*aH1,epsHa,T3);
cmult(sqrt(2.)/sqa1*aH1,conjepsH1,T4);
cmult(-sqrt(2.)*Fta*pa.dot(p1)*aH1/sqa1,conjeps1,T5);
cmult(-sqrt(2.)*Ft1*pa.dot(p1)*aH1/ang1a,epsa,T6);
cmult(-aH1/sqrt(2.)/sqa1*h4*8.*COM(0.,1.)*M_PI*M_PI,conjeps1,T7);
cmult(aH1/sqrt(2.)/ang1a*h5*8.*COM(0.,1.)*M_PI*M_PI,epsa,T8);
cmult(aH1*aH1/2./ang1a/sqa1*h10*8.*COM(0.,1.)*M_PI*M_PI,pacur,T9);
cmult(-aH1*aH1/2./ang1a/sqa1*h12*8.*COM(0.,1.)*M_PI*M_PI,p1cur,T10);
for(int i=0;i<4;i++)
{
ans[i] = T1[i]+T2[i]+T3[i]+T4[i]+T5[i]+T6[i]+T7[i]+T8[i]+T9[i]+T10[i];
}
retAns[0] = F/prop*ans[0];
retAns[1] = F/prop*ans[1];
retAns[2] = F/prop*ans[2];
retAns[3] = F/prop*ans[3];
}
// HNC amp for qg->qgH with finite top
void g_gH_HNC(CLHEP::HepLorentzVector pa, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector pH, double mq, current &retAns)
{
double prop;
//COM F = 4.*mq*mq/v/16./M_PI/M_PI;
double F = 4.*mq*mq/v;
COM ang1a,Fta,Ft1,phase,aH1,oneHa,h1,h2,h4,h5,h10,h12,sqa1,Falpha,Fbeta;
current ans,conjepsH1,epsHa,p1cur,pacur,pHcur,conjeps1,epsa,paplusp1cur,p1minuspacur,cur1a,cura1,epsHapart1,epsHapart2,conjepsH1part1,conjepsH1part2,T1,T2,T3,T4,T5a,T5b,T6,T7,T8a,T8b,T9,T10,T11a,T11b,T12a,T12b,T13;
// Find here if pa, meaning the gluon, is forward or backward
bool gluonforward = true;
if(pa.z() < 0)
gluonforward = false;
jio(pa,true,p1,true,cura1);
j(p1,true,pa,true,cur1a);
momtocurrent(pa,pacur);
momtocurrent(p1,p1cur);
momtocurrent(pH,pHcur);
momtocurrent(pa+p1,paplusp1cur);
momtocurrent(p1-pa,p1minuspacur);
aH1 = cdot(pHcur,cura1);
oneHa = cdot(pHcur,cur1a);
if(gluonforward){
ang1a = sqrt(pa.plus()*p1.minus())*(p1.x()+COM(0.,1.)*p1.y())/p1.perp();
sqa1 = sqrt(pa.plus()*p1.minus())*(p1.x()-COM(0.,1.)*p1.y())/p1.perp();
}
else {
ang1a = sqrt(pa.minus()*p1.plus());
sqa1 = sqrt(pa.minus()*p1.plus());
}
prop = (pa-p1-pH).m2();
cmult(1./sqrt(2)/sqa1,cur1a,epsa);
cmult(-1./sqrt(2)/sqa1,cura1,conjeps1);
phase = cdot(conjeps1,epsa);
Fta = FT(-pa,pa-pH,mq)/(pa-pH).m2();
Ft1 = FT(-p1-pH,p1,mq)/(p1+pH).m2();
Falpha = FT(p1-pa,pa-p1-pH,mq);
Fbeta = FL(p1-pa,pa-p1-pH,mq);
h1 = H1(p1,-pa,pH,mq);
h2 = H2(p1,-pa,pH,mq);
h4 = H4(p1,-pa,pH,mq);
h5 = H5(p1,-pa,pH,mq);
h10 = H10(p1,-pa,pH,mq);
h12 = H12(p1,-pa,pH,mq);
cmult(Fta*pa.dot(pH),epsa,epsHapart1);
cmult(-1.*Fta*cdot(pHcur,epsa),pacur,epsHapart2);
cmult(Ft1*cdot(pHcur,conjeps1),p1cur,conjepsH1part1);
cmult(-Ft1*p1.dot(pH),conjeps1,conjepsH1part2);
cadd(epsHapart1,epsHapart2,epsHa);
cadd(conjepsH1part1,conjepsH1part2,conjepsH1);
if(gluonforward){
cmult(sqrt(2.)*sqrt(p1.plus()/pa.plus())*prop/sqa1,conjepsH1,T1);
cmult(-sqrt(2.)*sqrt(pa.plus()/p1.plus())*prop/sqa1,epsHa,T2);
}
else{
cmult(-sqrt(2.)*sqrt(p1.minus()/pa.minus())*((p1.x()-COM(0.,1.)*p1.y())/p1.perp())*prop/sqa1,conjepsH1,T1);
cmult(sqrt(2.)*sqrt(pa.minus()/p1.minus())*((p1.x()+COM(0.,1.)*p1.y())/p1.perp())*prop/sqa1,epsHa,T2);
}
COM boxdiagFact = 8.*COM(0.,1.)*M_PI*M_PI;
cmult(aH1*sqrt(2.)/sqa1,epsHa,T3);
cmult(oneHa*sqrt(2.)/sqa1,conjepsH1,T4);
cmult(-2.*phase*Fta*pa.dot(pH),p1cur,T5a);
cmult(2.*phase*Ft1*p1.dot(pH),pacur,T5b);
cmult(-sqrt(2.)*Fta*p1.dot(pa)*oneHa/sqa1,conjeps1,T6);
cmult(-sqrt(2.)*Ft1*pa.dot(p1)*aH1/sqa1,epsa,T7);
cmult(-boxdiagFact*phase*h2,pacur,T8a);
cmult(boxdiagFact*phase*h1,p1cur,T8b);
cmult(boxdiagFact*aH1/sqrt(2.)/sqa1*h5,epsa,T9);
cmult(-boxdiagFact*oneHa/sqrt(2.)/sqa1*h4,conjeps1,T10);
cmult(boxdiagFact*aH1*oneHa/2./sqa1/sqa1*h10,pacur,T11a);
cmult(-boxdiagFact*aH1*oneHa/2./sqa1/sqa1*h12,p1cur,T11b);
cmult(-phase/(pa-p1).m2()*Falpha*(p1-pa).dot(pa-p1-pH),paplusp1cur,T12a);
cmult(phase/(pa-p1).m2()*Falpha*(pa+p1).dot(pa-p1-pH),p1minuspacur,T12b);
cmult(-phase*Fbeta*(pa-p1-pH).m2(),paplusp1cur,T13);
//cout << phase << endl;
for(int i=0;i<4;i++)
{
ans[i] = T1[i]+T2[i]+T3[i]+T4[i]+T5a[i]+T5b[i]+T6[i]+T7[i]+T8a[i]+T8b[i]+T9[i]+T10[i]+T11a[i]+T11b[i]+T12a[i]+T12b[i]+T13[i];
}
retAns[0] = F/prop*ans[0];
retAns[1] = F/prop*ans[1];
retAns[2] = F/prop*ans[2];
retAns[3] = F/prop*ans[3];
}
// JDC - new amplitude with Higgs emitted close to gluon with full mt effects. Keep usual HEJ-style function call
double MH2gq_outsideH(CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in, CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in, CLHEP::HepLorentzVector pH, double mq, bool includeBottom, double mq2)
{
current cur2bplus,cur2bminus, cur2bplusFlip, cur2bminusFlip;
current retAns,retAnsb;
j(p2out,true,p2in,true,cur2bplus);
j(p2out,false,p2in,false,cur2bminus);
j(ParityFlip(p2out),true,ParityFlip(p2in),true,cur2bplusFlip);
j(ParityFlip(p2out),false,ParityFlip(p2in),false,cur2bminusFlip);
COM app1,app2,apm1,apm2;
COM app3, app4, apm3, apm4;
if(!includeBottom)
{
g_gH_HC(p1in,p1out,pH,mq,retAns);
app1=cdot(retAns,cur2bplus);
app2=cdot(retAns,cur2bminus);
g_gH_HC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq,retAns);
app3=cdot(retAns,cur2bplusFlip);
app4=cdot(retAns,cur2bminusFlip);
// And non-conserving bits
g_gH_HNC(p1in,p1out,pH,mq,retAns);
apm1=cdot(retAns,cur2bplus);
apm2=cdot(retAns,cur2bminus);
g_gH_HNC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq,retAns);
apm3=cdot(retAns,cur2bplusFlip);
apm4=cdot(retAns,cur2bminusFlip);
}
else
{
g_gH_HC(p1in,p1out,pH,mq,retAns);
g_gH_HC(p1in,p1out,pH,mq2,retAnsb);
app1=cdot(retAns,cur2bplus) + cdot(retAnsb,cur2bplus);
app2=cdot(retAns,cur2bminus) + cdot(retAnsb,cur2bminus);
g_gH_HC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq,retAns);
g_gH_HC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq2,retAnsb);
app3=cdot(retAns,cur2bplusFlip) + cdot(retAnsb,cur2bplusFlip);
app4=cdot(retAns,cur2bminusFlip) + cdot(retAnsb,cur2bminusFlip);
// And non-conserving bits
g_gH_HNC(p1in,p1out,pH,mq,retAns);
g_gH_HNC(p1in,p1out,pH,mq2,retAnsb);
apm1=cdot(retAns,cur2bplus) + cdot(retAnsb,cur2bplus);
apm2=cdot(retAns,cur2bminus) + cdot(retAnsb,cur2bminus);
g_gH_HNC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq,retAns);
g_gH_HNC(ParityFlip(p1in),ParityFlip(p1out),ParityFlip(pH),mq2,retAnsb);
apm3=cdot(retAns,cur2bplusFlip) + cdot(retAnsb,cur2bplusFlip);
apm4=cdot(retAns,cur2bminusFlip) + cdot(retAnsb,cur2bminusFlip);
}
return (abs2(app1) + abs2(app2) + abs2(app3) + abs2(app4) + abs2(apm1) + abs2(apm2) + abs2(apm3) + abs2(apm4))*12./4./(3.*8.);
//return (abs2(app1))*12./(3.*8.);
// factor = 12 (colour sum) /4 (hel avg) /(3*8) (col avg)
}
#endif
double C2gHgm(CLHEP::HepLorentzVector p2, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector pH)
{
static double A=1./(3.*M_PI*v);
// Implements Eq. (4.22) in hep-ph/0301013 with modifications to incoming plus momenta
double s12,p1p,p2p;
COM p1perp,p3perp,phperp;
// Determine first whether this is the case p1p\sim php>>p3p og the opposite
s12=p1.invariantMass2(-p2);
if (p2.pz()>0.) { // case considered in hep-ph/0301013
p1p=p1.plus();
p2p=p2.plus();
} else { // opposite case
p1p=p1.minus();
p2p=p2.minus();
}
p1perp=p1.px()+COM(0,1)*p1.py();
phperp=pH.px()+COM(0,1)*pH.py();
p3perp=-(p1perp+phperp);
COM temp=COM(0,1)*A/(2.*s12)*(p2p/p1p*conj(p1perp)*p3perp+p1p/p2p*p1perp*conj(p3perp));
temp=temp*conj(temp);
return temp.real();
}
double C2gHgp(CLHEP::HepLorentzVector p2, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector pH)
{
static double A=1./(3.*M_PI*v);
// Implements Eq. (4.23) in hep-ph/0301013
double s12,php,p1p,phm;
COM p1perp,p3perp,phperp;
// Determine first whether this is the case p1p\sim php>>p3p og the opposite
s12=p1.invariantMass2(-p2);
if (p2.pz()>0.) { // case considered in hep-ph/0301013
php=pH.plus();
phm=pH.minus();
p1p=p1.plus();
} else { // opposite case
php=pH.minus();
phm=pH.plus();
p1p=p1.minus();
}
p1perp=p1.px()+COM(0,1)*p1.py();
phperp=pH.px()+COM(0,1)*pH.py();
p3perp=-(p1perp+phperp);
COM temp=-COM(0,1)*A/(2.*s12)*(conj(p1perp*p3perp)*pow(php/p1p,2)/(1.+php/p1p)+s12*(pow(conj(phperp),2)/(pow(abs(phperp),2)+p1p*phm)-pow(conj(p3perp)+(1.+php/p1p)*conj(p1perp),2)/((1.+php/p1p)*(pH.m2()+2.*p1.dot(pH)))));
temp=temp*conj(temp);
return temp.real();
}
double C2qHqm(CLHEP::HepLorentzVector p2, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector pH)
{
static double A=1./(3.*M_PI*v);
// Implements Eq. (4.22) in hep-ph/0301013
double s12,p2p,p1p;
COM p1perp,p3perp,phperp;
// Determine first whether this is the case p1p\sim php>>p3p og the opposite
s12=p1.invariantMass2(-p2);
if (p2.pz()>0.) { // case considered in hep-ph/0301013
p2p=p2.plus();
p1p=p1.plus();
} else { // opposite case
p2p=p2.minus();
p1p=p1.minus();
}
p1perp=p1.px()+COM(0,1)*p1.py();
phperp=pH.px()+COM(0,1)*pH.py();
p3perp=-(p1perp+phperp);
COM temp=A/(2.*s12)*(sqrt(p2p/p1p)*p3perp*conj(p1perp)+sqrt(p1p/p2p)*p1perp*conj(p3perp));
temp=temp*conj(temp);
return temp.real();
}
diff --git a/src/MatrixElement.cc b/src/MatrixElement.cc
index 2fbfe9d..3260f27 100644
--- a/src/MatrixElement.cc
+++ b/src/MatrixElement.cc
@@ -1,771 +1,771 @@
#include "RHEJ/MatrixElement.hh"
#include <CLHEP/Random/Randomize.h>
#include <CLHEP/Random/RanluxEngine.h>
#include "RHEJ/currents.hh"
#include "RHEJ/PDG_codes.hh"
#include "RHEJ/uno.hh"
#include "RHEJ/debug.hh"
-#ifdef USE_LT
+#ifdef RHEJ_BUILD_WITH_LT
#include "clooptools.h"
#endif
namespace{
constexpr int N_C = 3;
constexpr int C_A = N_C;
constexpr double C_F = (N_C*N_C - 1.)/(2.*N_C);
constexpr double t_f = 1./2.;
constexpr double clambda = 0.2;
constexpr int n_f = 5;
constexpr double beta0 = 11./3.*C_A - 4./3.*t_f*n_f;
constexpr int max_looptool_calls = 10000;
}
namespace RHEJ{
//cf. last line of eq. (22) in \ref Andersen:2011hs
double MatrixElement::omega0(
double alpha_s, double mur,
fastjet::PseudoJet const & q_j, double lambda
) const {
const double result = - alpha_s*N_C/M_PI*log(q_j.perp2()/(lambda*lambda));
if(! log_corr_) return result;
// use alpha_s(sqrt(q_j*lambda)), evolved to mur
return (
1. + alpha_s/(4.*M_PI)*beta0*log(mur*mur/(q_j.perp()*lambda))
)*result;
}
double MatrixElement::virtual_corrections(
double alpha_s, double mur,
std::array<Sparticle, 2> const & in,
std::vector<Sparticle> const & out
) const{
fastjet::PseudoJet const & pa = in.front().p;
#ifndef NDEBUG
fastjet::PseudoJet const & pb = in.back().p;
#endif
assert(std::is_sorted(out.begin(), out.end(), rapidity_less{}));
assert(out.size() >= 2);
assert(pa.pz() < pb.pz());
fastjet::PseudoJet q = pa - out[0].p;
size_t first_idx = 0;
size_t last_idx = out.size() - 1;
// if there is a Higgs or unordered gluon outside the extremal partons
// then it is not part of the FKL ladder and does not contribute
// to the virtual corrections
if(out.front().type == pid::Higgs || has_unob_gluon(in, out)){
q -= out[1].p;
++first_idx;
}
if(out.back().type == pid::Higgs || has_unof_gluon(in, out)){
--last_idx;
}
double exponent = 0;
for(size_t j = first_idx; j < last_idx; ++j){
exponent += omega0(alpha_s, mur, q, clambda)*(
out[j+1].rapidity() - out[j].rapidity()
);
q -= out[j+1].p;
}
assert(
nearby(q, -1*pb)
|| out.back().type == pid::Higgs
|| has_unof_gluon(in, out)
);
return exp(exponent);
}
}
namespace {
//! Lipatov vertex for partons emitted into extremal jets
double C2Lipatov(CLHEP::HepLorentzVector qav, CLHEP::HepLorentzVector qbv, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector p2)
{
CLHEP::HepLorentzVector temptrans=-(qav+qbv);
CLHEP::HepLorentzVector p5=qav-qbv;
CLHEP::HepLorentzVector CL=temptrans+(qav.m2()/p5.dot(p1)+2.*p5.dot(p2)/p1.dot(p2))*p1-p2*(qbv.m2()/p5.dot(p2)+2.*p5.dot(p1)/p1.dot(p2));
#if printoutput
cout << "#Fadin qa : "<<qav<<endl;
cout << "#Fadin qb : "<<qbv<<endl;
cout << "#Fadin p1 : "<<p1<<endl;
cout << "#Fadin p2 : "<<p2<<endl;
cout << "#Fadin p5 : "<<p5<<endl;
cout << "#Fadin Gauge Check : "<< CL.dot(p5)<<endl;
cout << "#Fadin C2L : "<< -CL.dot(CL)<<" "<<-CL.dot(CL)/(qav.m2()*qbv.m2())/(4./p5.perp2())<<endl;
#endif
#if 0
if (-CL.dot(CL)<0.)
// if (fabs(CL.dot(p5))>fabs(CL.dot(CL))) // not sufficient!
return 0.;
else
#endif
return -CL.dot(CL);
}
//! Lipatov vertex with soft subtraction for partons emitted into extremal jets
double C2Lipatovots(CLHEP::HepLorentzVector qav, CLHEP::HepLorentzVector qbv, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector p2)
{
double kperp=(qav-qbv).perp();
if (kperp>clambda)
return C2Lipatov(qav, qbv, p1, p2)/(qav.m2()*qbv.m2());
else {
double Cls=(C2Lipatov(qav, qbv, p1, p2)/(qav.m2()*qbv.m2()));
double temp=Cls-4./(kperp*kperp);
// std::cout <<kperp <<" "<<temp<<" "<<4./(kperp*kperp)<<" "<<(C2Lipatov(qav, qbv, pa, pb, p1, p2)/(qav.m2()*qbv.m2()))<<std::endl;
return temp;
}
}
//! Lipatov vertex
double C2Lipatov(CLHEP::HepLorentzVector qav, CLHEP::HepLorentzVector qbv, CLHEP::HepLorentzVector pim, CLHEP::HepLorentzVector pip,CLHEP::HepLorentzVector pom, CLHEP::HepLorentzVector pop) // B
{
CLHEP::HepLorentzVector temptrans=-(qav+qbv);
CLHEP::HepLorentzVector p5=qav-qbv;
CLHEP::HepLorentzVector CL=temptrans+qav.m2()*(1./p5.dot(pip)*pip+1./p5.dot(pop)*pop)/2.-qbv.m2()*(1./p5.dot(pim)*pim+1./p5.dot(pom)*pom)/2.+(pip*(p5.dot(pim)/pip.dot(pim)+p5.dot(pom)/pip.dot(pom)) + pop*(p5.dot(pim)/pop.dot(pim)+p5.dot(pom)/pop.dot(pom)) - pim*(p5.dot(pip)/pip.dot(pim) + p5.dot(pop)/pop.dot(pim)) - pom*(p5.dot(pip)/pip.dot(pom) + p5.dot(pop)/pop.dot(pom)) )/2.;
return -CL.dot(CL);
}
//! Lipatov vertex with soft subtraction
double C2Lipatovots(CLHEP::HepLorentzVector qav, CLHEP::HepLorentzVector qbv, CLHEP::HepLorentzVector pa, CLHEP::HepLorentzVector pb, CLHEP::HepLorentzVector p1, CLHEP::HepLorentzVector p2)
{
double kperp=(qav-qbv).perp();
if (kperp>clambda)
return C2Lipatov(qav, qbv, pa, pb, p1, p2)/(qav.m2()*qbv.m2());
else {
double Cls=(C2Lipatov(qav, qbv, pa, pb, p1, p2)/(qav.m2()*qbv.m2()));
double temp=Cls-4./(kperp*kperp);
return temp;
}
}
/** Matrix element squared for tree-level current-current scattering
* @param aptype Particle a PDG ID
* @param bptype Particle b PDG ID
* @param pn Particle n Momentum
* @param pb Particle b Momentum
* @param p1 Particle 1 Momentum
* @param pa Particle a Momentum
* @returns ME Squared for Tree-Level Current-Current Scattering
*/
double ME_current(
int aptype, int bptype,
CLHEP::HepLorentzVector const & pn,
CLHEP::HepLorentzVector const & pb,
CLHEP::HepLorentzVector const & p1,
CLHEP::HepLorentzVector const & pa
){
if (aptype==21&&bptype==21) {
return jM2gg(pn,pb,p1,pa);
} else if (aptype==21&&bptype!=21) {
if (bptype > 0)
return jM2qg(pn,pb,p1,pa);
else
return jM2qbarg(pn,pb,p1,pa);
}
else if (bptype==21&&aptype!=21) { // ----- || -----
if (aptype > 0)
return jM2qg(p1,pa,pn,pb);
else
return jM2qbarg(p1,pa,pn,pb);
}
else { // they are both quark
if (bptype>0) {
if (aptype>0)
return jM2qQ(pn,pb,p1,pa);
else
return jM2qQbar(pn,pb,p1,pa);
}
else {
if (aptype>0)
return jM2qQbar(p1,pa,pn,pb);
else
return jM2qbarQbar(pn,pb,p1,pa);
}
}
throw std::logic_error("unknown particle types");
}
/** \brief Matrix element squared for tree-level current-current scattering with Higgs
* @param aptype Particle a PDG ID
* @param bptype Particle b PDG ID
* @param pn Particle n Momentum
* @param pb Particle b Momentum
* @param p1 Particle 1 Momentum
* @param pa Particle a Momentum
* @param qH t-channel momentum before Higgs
* @param qHp1 t-channel momentum after Higgs
* @returns ME Squared for Tree-Level Current-Current Scattering with Higgs
*/
double ME_Higgs_current(
int aptype, int bptype,
CLHEP::HepLorentzVector const & pn,
CLHEP::HepLorentzVector const & pb,
CLHEP::HepLorentzVector const & p1,
CLHEP::HepLorentzVector const & pa,
CLHEP::HepLorentzVector const & qH, // t-channel momentum before Higgs
CLHEP::HepLorentzVector const & qHp1, // t-channel momentum after Higgs
double mt, bool include_bottom, double mb
){
if (aptype==21&&bptype==21) // gg initial state
return MH2gg(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else if (aptype==21&&bptype!=21) {
if (bptype > 0)
return MH2qg(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb)*4./9.;
else
return MH2qbarg(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb)*4./9.;
}
else if (bptype==21&&aptype!=21) {
if (aptype > 0)
return MH2qg(p1,pa,pn,pb,-qH,-qHp1,mt,include_bottom,mb)*4./9.;
else
return MH2qbarg(p1,pa,pn,pb,-qH,-qHp1,mt,include_bottom,mb)*4./9.;
}
else { // they are both quark
if (bptype>0) {
if (aptype>0)
return MH2qQ(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb)*4.*4./(9.*9.);
else
return MH2qQbar(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb)*4.*4./(9.*9.);
}
else {
if (aptype>0)
return MH2qQbar(p1,pa,pn,pb,-qH,-qHp1,mt,include_bottom,mb)*4.*4./(9.*9.);
else
return MH2qbarQbar(pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb)*4.*4./(9.*9.);
}
}
throw std::logic_error("unknown particle types");
}
/** \brief Current matrix element squared with Higgs and unordered forward emission
* @param aptype Particle A PDG ID
* @param bptype Particle B PDG ID
* @param punof Unordered Particle Momentum
* @param pn Particle n Momentum
* @param pb Particle b Momentum
* @param p1 Particle 1 Momentum
* @param pa Particle a Momentum
* @param qH t-channel momentum before Higgs
* @param qHp1 t-channel momentum after Higgs
* @returns ME Squared with Higgs and unordered forward emission
*/
double ME_Higgs_current_unof(
int aptype, int bptype,
CLHEP::HepLorentzVector const & punof,
CLHEP::HepLorentzVector const & pn,
CLHEP::HepLorentzVector const & pb,
CLHEP::HepLorentzVector const & p1,
CLHEP::HepLorentzVector const & pa,
CLHEP::HepLorentzVector const & qH, // t-channel momentum before Higgs
CLHEP::HepLorentzVector const & qHp1, // t-channel momentum after Higgs
double mt, bool include_bottom, double mb
){
if (aptype==21&&bptype!=21) {
if (bptype > 0)
return jM2unogqHg(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unogqbarHg(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
else { // they are both quark
if (bptype>0) {
if (aptype>0)
return jM2unogqHQ(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unogqHQbar(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
else {
if (aptype>0)
return jM2unogqbarHQ(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unogqbarHQbar(punof,pn,pb,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
}
throw std::logic_error("unknown particle types");
}
/** \brief Current matrix element squared with Higgs and unordered backward emission
* @param aptype Particle A PDG ID
* @param bptype Particle B PDG ID
* @param pn Particle n Momentum
* @param pb Particle b Momentum
* @param punob Unordered back Particle Momentum
* @param p1 Particle 1 Momentum
* @param pa Particle a Momentum
* @param qH t-channel momentum before Higgs
* @param qHp1 t-channel momentum after Higgs
* @returns ME Squared with Higgs and unordered backward emission
*/
double ME_Higgs_current_unob(
int aptype, int bptype,
CLHEP::HepLorentzVector const & pn,
CLHEP::HepLorentzVector const & pb,
CLHEP::HepLorentzVector const & punob,
CLHEP::HepLorentzVector const & p1,
CLHEP::HepLorentzVector const & pa,
CLHEP::HepLorentzVector const & qH, // t-channel momentum before Higgs
CLHEP::HepLorentzVector const & qHp1, // t-channel momentum after Higgs
double mt, bool include_bottom, double mb
){
if (bptype==21&&aptype!=21) {
if (aptype > 0)
return jM2unobgHQg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unobgHQbarg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
else { // they are both quark
if (aptype>0) {
if (bptype>0)
return jM2unobqHQg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unobqbarHQg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
else {
if (bptype>0)
return jM2unobqHQbarg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
else
return jM2unobqbarHQbarg(pn,pb,punob,p1,pa,-qHp1,-qH,mt,include_bottom,mb);
}
}
throw std::logic_error("unknown particle types");
}
CLHEP::HepLorentzVector to_HepLorentzVector(RHEJ::Sparticle const & particle){
return {particle.p.px(), particle.p.py(), particle.p.pz(), particle.p.E()};
}
} // RHEJ namespace
namespace RHEJ{
MatrixElement::MatrixElement(
fastjet::JetDefinition jet_def, double jetptmin,
bool log_corr,
HiggsCouplingSettings Higgs_settings
):
jet_def_{jet_def},
jetptmin_{jetptmin},
mt_{Higgs_settings.mt},
mb_{Higgs_settings.mb},
looptool_calls_{0},
use_impact_factors_{Higgs_settings.use_impact_factors},
include_bottom_{Higgs_settings.include_bottom},
log_corr_{log_corr}
{}
double MatrixElement::operator()(
double alpha_s, double mur,
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
return tree(
alpha_s, mur,
incoming, outgoing,
check_momenta
)*virtual_corrections(
alpha_s, mur,
incoming, outgoing
);
}
double MatrixElement::tree_kin(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
assert(
std::is_sorted(
incoming.begin(), incoming.end(),
[](Sparticle o1, Sparticle o2){return o1.p.pz()<o2.p.pz();}
)
);
assert(std::is_sorted(outgoing.begin(), outgoing.end(), rapidity_less{}));
auto AWZH_boson = std::find_if(
begin(outgoing), end(outgoing),
[](Sparticle const & p){return is_AWZH_boson(p);}
);
if(AWZH_boson == end(outgoing)){
return tree_kin_jets(incoming, outgoing, check_momenta);
}
switch(AWZH_boson->type){
case pid::Higgs: {
constexpr double alpha_s_mH = 0.113559;
return alpha_s_mH*alpha_s_mH/(256.*pow(M_PI, 5))*tree_kin_Higgs(
incoming, outgoing, check_momenta
);
}
// TODO
case pid::Wp:
case pid::Wm:
case pid::photon:
case pid::Z:
default:
throw std::logic_error("Emission of boson of unsupported type");
}
}
namespace{
constexpr int extremal_jet_idx = 1;
constexpr int no_extremal_jet_idx = 0;
bool treat_as_extremal(Sparticle const & parton){
return parton.p.user_index() == extremal_jet_idx;
}
template<class InputIterator>
double FKL_ladder_weight(
InputIterator begin_gluon, InputIterator end_gluon,
CLHEP::HepLorentzVector const & q0,
CLHEP::HepLorentzVector const & pa, CLHEP::HepLorentzVector const & pb,
CLHEP::HepLorentzVector const & p1, CLHEP::HepLorentzVector const & pn
){
double wt = 1;
auto qi = q0;
for(auto gluon_it = begin_gluon; gluon_it != end_gluon; ++gluon_it){
assert(gluon_it->type == pid::gluon);
const auto g = to_HepLorentzVector(*gluon_it);
const auto qip1 = qi - g;
if(treat_as_extremal(*gluon_it)){
wt *= C2Lipatovots(qip1, qi, pa, pb)*C_A;
} else{
wt *= C2Lipatovots(qip1, qi, pa, pb, p1, pn)*C_A;
}
qi = qip1;
}
return wt;
}
} // anonymous namespace
std::vector<Sparticle> MatrixElement::tag_extremal_jet_partons(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> out_partons, bool check_momenta
) const{
if(!check_momenta){
for(auto & parton: out_partons){
parton.p.set_user_index(no_extremal_jet_idx);
}
return out_partons;
}
fastjet::ClusterSequence cs(to_PseudoJet(out_partons), jet_def_);
const auto jets = sorted_by_rapidity(cs.inclusive_jets(jetptmin_));
assert(jets.size() >= 2);
auto most_backward = begin(jets);
auto most_forward = end(jets) - 1;
// skip jets caused by unordered emission
if(has_unob_gluon(incoming, out_partons)){
assert(jets.size() >= 3);
++most_backward;
}
else if(has_unof_gluon(incoming, out_partons)){
assert(jets.size() >= 3);
--most_forward;
}
const auto extremal_jet_indices = cs.particle_jet_indices(
{*most_backward, *most_forward}
);
assert(extremal_jet_indices.size() == out_partons.size());
for(size_t i = 0; i < out_partons.size(); ++i){
assert(RHEJ::is_parton(out_partons[i]));
const int idx = (extremal_jet_indices[i]>=0)?
extremal_jet_idx:
no_extremal_jet_idx;
out_partons[i].p.set_user_index(idx);
}
return out_partons;
}
double MatrixElement::tree_kin_jets(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> partons,
bool check_momenta
) const {
partons = tag_extremal_jet_partons(incoming, partons, check_momenta);
if(has_unob_gluon(incoming, partons) || has_unof_gluon(incoming, partons)){
throw std::logic_error("unordered emission not implemented for pure jets");
}
const auto pa = to_HepLorentzVector(incoming[0]);
const auto pb = to_HepLorentzVector(incoming[1]);
const auto p1 = to_HepLorentzVector(partons.front());
const auto pn = to_HepLorentzVector(partons.back());
return ME_current(
incoming[0].type, incoming[1].type,
pn, pb, p1, pa
)/(4*(N_C*N_C - 1))*FKL_ladder_weight(
begin(partons) + 1, end(partons) - 1,
pa - p1, pa, pb, p1, pn
);
}
double MatrixElement::tree_kin_Higgs(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
-#ifdef USE_LT
+#ifdef RHEJ_BUILD_WITH_LT
++looptool_calls_;
if(looptool_calls_ % max_looptool_calls) clearcache();
#endif
if(has_uno_gluon(incoming, outgoing)){
return tree_kin_Higgs_between(incoming, outgoing, check_momenta);
}
if(outgoing.front().type == pid::Higgs){
return tree_kin_Higgs_first(incoming, outgoing, check_momenta);
}
if(outgoing.back().type == pid::Higgs){
return tree_kin_Higgs_last(incoming, outgoing, check_momenta);
}
return tree_kin_Higgs_between(incoming, outgoing, check_momenta);
}
double MatrixElement::MH2_forwardH(
RHEJ::ParticleID id,
CLHEP::HepLorentzVector p1out, CLHEP::HepLorentzVector p1in,
CLHEP::HepLorentzVector p2out, CLHEP::HepLorentzVector p2in,
CLHEP::HepLorentzVector pH,
double t1, double t2
) const{
ignore(p2out, p2in);
const double shat = p1in.invariantMass2(p2in);
assert(RHEJ::is_parton(id));
if(id != RHEJ::pid::gluon){
return 9./2.*shat*shat*C2qHqm(p1in,p1out,pH)/(t1*t2);
}
// gluon case
-#ifdef USE_LT
+#ifdef RHEJ_BUILD_WITH_LT
if(!use_impact_factors_){
return C_A/C_F*1./(16*M_PI*M_PI)*t1/t2*MH2gq_outsideH(
p1out, p1in, p2out, p2in, pH, mt_, include_bottom_, mb_
);
}
#endif
return 9./2.*shat*shat*(
C2gHgp(p1in,p1out,pH) + C2gHgm(p1in,p1out,pH)
)/(t1*t2);
}
double MatrixElement::tree_kin_Higgs_first(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
assert(outgoing.front().type == pid::Higgs);
const auto pH = to_HepLorentzVector(outgoing.front());
const auto partons = tag_extremal_jet_partons(
incoming,
std::vector<Sparticle>(begin(outgoing) + 1, end(outgoing)),
check_momenta
);
const auto pa = to_HepLorentzVector(incoming[0]);
const auto pb = to_HepLorentzVector(incoming[1]);
const auto p1 = to_HepLorentzVector(partons.front());
const auto pn = to_HepLorentzVector(partons.back());
const auto q0 = pa - p1 - pH;
const double t1 = q0.m2();
const double t2 = (pn - pb).m2();
double wt = MH2_forwardH(
incoming[0].type, p1, pa, pn, pb, pH,
t1, t2
)*FKL_ladder_weight(
begin(partons) + 1, end(partons) - 1,
q0, pa, pb, p1, pn
);
for(auto const & inc: incoming){
if(inc.type != pid::gluon) wt *= C_F/C_A;
}
return wt;
}
double MatrixElement::tree_kin_Higgs_last(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
assert(outgoing.back().type == pid::Higgs);
const auto pH = to_HepLorentzVector(outgoing.back());
const auto partons = tag_extremal_jet_partons(
incoming,
std::vector<Sparticle>(begin(outgoing), end(outgoing) - 1),
check_momenta
);
const auto pa = to_HepLorentzVector(incoming[0]);
const auto pb = to_HepLorentzVector(incoming[1]);
auto p1 = to_HepLorentzVector(partons.front());
const auto pn = to_HepLorentzVector(partons.back());
auto q0 = pa - p1;
const double t1 = q0.m2();
const double t2 = (pn + pH - pb).m2();
double wt = MH2_forwardH(
incoming[1].type, pn, pb, p1, pa, pH,
t2, t1
)*FKL_ladder_weight(
begin(partons) + 1, end(partons) - 1,
q0, pa, pb, p1, pn
);
for(auto const & inc: incoming){
if(inc.type != pid::gluon) wt *= C_F/C_A;
}
return wt;
}
double MatrixElement::tree_kin_Higgs_between(
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
const auto the_Higgs = std::find_if(
begin(outgoing), end(outgoing),
[](Sparticle const & s){ return s.type == pid::Higgs; }
);
assert(the_Higgs != end(outgoing));
const auto pH = to_HepLorentzVector(*the_Higgs);
std::vector<Sparticle> partons(begin(outgoing), the_Higgs);
partons.insert(end(partons), the_Higgs + 1, end(outgoing));
partons = tag_extremal_jet_partons(incoming, partons, check_momenta);
const auto pa = to_HepLorentzVector(incoming[0]);
const auto pb = to_HepLorentzVector(incoming[1]);
auto p1 = to_HepLorentzVector(
partons[has_unob_gluon(incoming, outgoing)?1:0]
);
auto pn = to_HepLorentzVector(
partons[partons.size() - (has_unof_gluon(incoming, outgoing)?2:1)]
);
auto first_after_Higgs = begin(partons) + (the_Higgs-begin(outgoing));
assert(
(first_after_Higgs == end(partons) && has_unob_gluon(incoming, outgoing))
|| first_after_Higgs->rapidity() >= the_Higgs->rapidity()
);
assert(
(first_after_Higgs == begin(partons) && has_unof_gluon(incoming, outgoing))
|| (first_after_Higgs-1)->rapidity() <= the_Higgs->rapidity()
);
// always treat the Higgs as if it were in between the extremal FKL partons
if(first_after_Higgs == begin(partons)) ++first_after_Higgs;
else if(first_after_Higgs == end(partons)) --first_after_Higgs;
// t-channel momentum before Higgs
auto qH = pa;
for(auto parton_it = begin(partons); parton_it != first_after_Higgs; ++parton_it){
qH -= to_HepLorentzVector(*parton_it);
}
auto q0 = pa - p1;
auto begin_ladder = begin(partons) + 1;
auto end_ladder = end(partons) - 1;
double current_factor;
if(has_unob_gluon(incoming, outgoing)){
current_factor = 9./2.*ME_Higgs_current_unob(
incoming[0].type, incoming[1].type,
pn, pb, to_HepLorentzVector(partons.front()), p1, pa, qH, qH - pH,
mt_, include_bottom_, mb_
);
const auto p_unob = to_HepLorentzVector(partons.front());
q0 -= p_unob;
p1 += p_unob;
++begin_ladder;
}
else if(has_unof_gluon(incoming, outgoing)){
current_factor = 9./2.*ME_Higgs_current_unof(
incoming[0].type, incoming[1].type,
to_HepLorentzVector(partons.back()), pn, pb, p1, pa, qH, qH - pH,
mt_, include_bottom_, mb_
);
pn += to_HepLorentzVector(partons.back());
--end_ladder;
}
else{
current_factor = ME_Higgs_current(
incoming[0].type, incoming[1].type,
pn, pb, p1, pa, qH, qH - pH,
mt_, include_bottom_, mb_
);
}
const double ladder_factor = FKL_ladder_weight(
begin_ladder, first_after_Higgs,
q0, pa, pb, p1, pn
)*FKL_ladder_weight(
first_after_Higgs, end_ladder,
qH - pH, pa, pb, p1, pn
);
return current_factor*9./8.*ladder_factor;
}
double MatrixElement::tree_param_partons(
double alpha_s, double mur,
std::vector<Sparticle> const & partons
) const{
const double gs2 = 4.*M_PI*alpha_s;
double wt = std::pow(gs2, partons.size());
if(log_corr_){
// use alpha_s(q_perp), evolved to mur
assert(partons.size() >= 2);
for(size_t i = 1; i < partons.size()-1; ++i){
wt *= 1 + alpha_s/(2*M_PI)*beta0*log(mur/partons[i].p.perp());
}
}
return wt;
}
double MatrixElement::tree_param(
double alpha_s, double mur,
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing
) const{
if(has_unob_gluon(incoming, outgoing)){
return 4*M_PI*alpha_s*tree_param_partons(
alpha_s, mur, filter_partons({begin(outgoing) + 1, end(outgoing)})
);
}
if(has_unof_gluon(incoming, outgoing)){
return 4*M_PI*alpha_s*tree_param_partons(
alpha_s, mur, filter_partons({begin(outgoing), end(outgoing) - 1})
);
}
return tree_param_partons(alpha_s, mur, filter_partons(outgoing));
}
double MatrixElement::tree(
double alpha_s, double mur,
std::array<Sparticle, 2> const & incoming,
std::vector<Sparticle> const & outgoing,
bool check_momenta
) const {
return tree_param(alpha_s, mur, incoming, outgoing)*tree_kin(
incoming, outgoing, check_momenta
);
}
} // namespace RHEJ
diff --git a/src/config.cc b/src/config.cc
index 664320f..694d75c 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -1,599 +1,599 @@
#include "RHEJ/config.hh"
#include <set>
#include <string>
#include <vector>
#include <iostream>
#include <stdexcept>
namespace RHEJ{
FileFormat to_FileFormat(std::string const & name){
static const std::map<std::string, FileFormat> known = {
{"Les Houches", FileFormat::Les_Houches},
{"HepMC", FileFormat::HepMC}
};
const auto res = known.find(name);
if(res == known.end()){
throw std::invalid_argument("Unknown file format " + name);
}
return res->second;
}
std::string extract_suffix(std::string const & filename){
size_t separator = filename.rfind('.');
if(separator == filename.npos) return {};
return filename.substr(separator + 1);
}
FileFormat format_from_suffix(std::string const & filename){
const std::string suffix = extract_suffix(filename);
if(suffix == "lhe") return FileFormat::Les_Houches;
if(suffix == "hepmc3") return FileFormat::HepMC;
throw std::invalid_argument{
"Can't determine format for output file " + filename
};
}
}
namespace YAML {
template<>
struct convert<RHEJ::OutputFile> {
static Node encode(RHEJ::OutputFile const & outfile) {
Node node;
node[to_string(outfile.format)] = outfile.name;
return node;
}
static bool decode(Node const & node, RHEJ::OutputFile & out) {
switch(node.Type()){
case NodeType::Map: {
YAML::const_iterator it = node.begin();
out.format = RHEJ::to_FileFormat(it->first.as<std::string>());
out.name = it->second.as<std::string>();
return true;
}
case NodeType::Scalar:
out.name = node.as<std::string>();
out.format = RHEJ::format_from_suffix(out.name);
return true;
default:
return false;
}
}
};
}
namespace RHEJ{
namespace{
struct invalid_type: std::invalid_argument {
explicit invalid_type(std::string const & what):
std::invalid_argument{what} {};
explicit invalid_type(char const * what):
std::invalid_argument{what} {};
};
struct missing_option: std::logic_error {
explicit missing_option(std::string const & what):
std::logic_error{what} {};
explicit missing_option(char const * what):
std::logic_error{what} {};
};
static const std::set<std::string> known = {
{"trials"},
{"min extparton pt"}, {"max ext soft pt fraction"},
{"resummation jets"}, {"fixed order jets"},
{"FKL"}, {"non-FKL"}, {"unordered"},
{"log correction"},
{"event output"},
{"analysis"},
{"unweight"}, {"RanLux init"},
{"scales"}, {"scale factors"}, {"max scale ratio"},
{"Higgs coupling"}
};
static const std::set<std::string> known_jet = {
{"min pt"}, {"algorithm"}, {"R"}
};
template<typename T>
std::string type_string();
template<>
std::string type_string<std::vector<double>>(){
return "array of doubles";
}
template<>
std::string type_string<std::vector<std::string>>(){
return "array of strings";
}
template<>
std::string type_string<int>(){
return "integer";
}
template<>
std::string type_string<double>(){
return "double";
}
template<>
std::string type_string<bool>(){
return "bool";
}
template<>
std::string type_string<std::string>(){
return "string";
}
template<>
std::string type_string<std::vector<OutputFile>>(){
return "array of output files";
}
fastjet::JetAlgorithm to_JetAlgorithm(std::string const & algo){
using namespace fastjet;
static const std::map<std::string, fastjet::JetAlgorithm> known = {
{"kt", kt_algorithm},
{"cambridge", cambridge_algorithm},
{"antikt", antikt_algorithm},
{"genkt", genkt_algorithm},
{"cambridge for passive", cambridge_for_passive_algorithm},
{"genkt for passive", genkt_for_passive_algorithm},
{"ee kt", ee_kt_algorithm},
{"ee genkt", ee_genkt_algorithm},
{"plugin", plugin_algorithm}
};
const auto res = known.find(algo);
if(res == known.end()){
throw std::invalid_argument("Unknown jet algorithm " + algo);
}
return res->second;
}
EventTreatment to_EventTreatment(std::string const & name){
static const std::map<std::string, EventTreatment> known = {
{"reweight", EventTreatment::reweight},
{"keep", EventTreatment::keep},
{"discard", EventTreatment::discard}
};
const auto res = known.find(name);
if(res == known.end()){
throw std::invalid_argument("Unknown event treatment " + name);
}
return res->second;
}
// helper struct to allow partial template specialisation
template<typename T>
struct existing_as_helper{
static T as(YAML::Node const & config, std::string const & entry){
assert(config[entry]);
try{
return config[entry].as<T>();
}
catch(std::exception const &){
throw invalid_type{
"Entry " + entry + " is not of type " + type_string<T>()
};
}
}
};
template<>
struct existing_as_helper<fastjet::JetAlgorithm>{
static fastjet::JetAlgorithm as(
YAML::Node const & config, std::string const & entry
){
assert(config[entry]);
const std::string algo_name =
existing_as_helper<std::string>::as(config, entry);
return to_JetAlgorithm(algo_name);
}
};
template<>
struct existing_as_helper<EventTreatment>{
static EventTreatment as(
YAML::Node const & config, std::string const & entry
){
assert(config[entry]);
const std::string name =
existing_as_helper<std::string>::as(config, entry);
return to_EventTreatment(name);
}
};
template<>
struct existing_as_helper<OutputFile>{
static OutputFile as(
YAML::Node const & config, std::string const & entry
){
assert(config[entry]);
YAML::convert<RHEJ::OutputFile> converter{};
OutputFile out;
if(converter.decode(config[entry], out)) return out;
throw std::invalid_argument{
"Bad output file setting: " + config[entry].as<std::string>()
};
}
};
template<typename T>
struct existing_as_helper<std::vector<T>>{
static std::vector<T> as(
YAML::Node const & config, std::string const & entry
){
assert(config[entry]);
// special case: treat a single value like a vector with one element
if(config[entry].IsScalar()){
return {existing_as_helper<T>::as(config, entry)};
}
try{
return config[entry].as<std::vector<T>>();
}
catch(std::exception const & p){
std::cerr << "Error: " << p.what() << '\n';
throw invalid_type{
"Entry " + entry + " is not of type " + type_string<std::vector<T>>()
};
}
}
};
template<typename T>
T existing_as(YAML::Node const & config, std::string const & entry){
return existing_as_helper<T>::as(config, entry);
}
template<typename T>
T as(YAML::Node const & config, std::string const & entry);
template<>
JetParameters existing_as<JetParameters>(
YAML::Node const & config, std::string const & entry
){
assert(config[entry]);
YAML::Node const & jet_config = config[entry];
JetParameters result;
for(auto const & opt: jet_config){
auto const & opt_name = opt.first.as<std::string>();
if(! known_jet.count(opt_name)){
std::cerr << "In entry " + entry + ": "
+ "Unknown option " + opt_name + "\n";
}
}
try{
result.def = fastjet::JetDefinition{
as<fastjet::JetAlgorithm>(jet_config, "algorithm"),
as<double>(jet_config, "R")
};
result.min_pt = as<double>(jet_config, "min pt");
return result;
}
catch(missing_option const & exc){
throw missing_option{"In entry " + entry + ":\n" + exc.what()};
}
catch(invalid_type const & exc){
throw invalid_type{"In entry " + entry + ":\n" + exc.what()};
}
}
template<typename T>
T as(YAML::Node const & config, std::string const & entry){
if(!config[entry]){
throw missing_option{"No entry for option " + entry};
}
return existing_as<T>(config, entry);
}
template<typename T>
optional<T> as_optional(YAML::Node const & config, std::string const & entry){
if(!config[entry]) return {};
return {existing_as<T>(config, entry)};
}
template<>
HiggsCouplingSettings as<HiggsCouplingSettings>(
YAML::Node const & config, std::string const & entry
){
static constexpr double mt_max = 2e4;
HiggsCouplingSettings settings;
if(!config[entry]) return settings;
-#ifndef USE_LT
+#ifndef RHEJ_BUILD_WITH_LT
throw std::invalid_argument{
"Higgs coupling settings require building Reversed HEJ "
"with looptools support"
};
#endif
if(config[entry]["mt"]){
settings.mt = config[entry]["mt"].as<double>();
}
if(config[entry]["mb"]){
settings.mb = config[entry]["mb"].as<double>();
}
if(config[entry]["include bottom"]){
settings.include_bottom = config[entry]["include bottom"].as<bool>();
}
if(config[entry]["use impact factors"]){
settings.use_impact_factors =
config[entry]["use impact factors"].as<bool>();
}
if(settings.use_impact_factors){
if(settings.mt != std::numeric_limits<double>::infinity()){
throw std::invalid_argument{
"Conflicting settings: "
"impact factors may only be used in the infinite top mass limit"
};
}
}
else{
// huge values of the top mass are numerically unstable
settings.mt = std::min(settings.mt, mt_max);
}
return settings;
}
void update_fixed_order_jet_parameters(
JetParameters & fixed_order_jets, YAML::Node const & yaml
){
YAML::Node const & yaml_jets = yaml["fixed order jets"];
assert(yaml_jets);
for(auto const & opt: yaml_jets){
auto const & opt_name = opt.first.as<std::string>();
if(! known_jet.count(opt_name)){
std::cerr << "In entry fixed order jets: "
"Unknown option " + opt_name + "\n";
}
}
try{
auto algo = as_optional<fastjet::JetAlgorithm>(yaml_jets, "algorithm");
if(algo){
fixed_order_jets.def = fastjet::JetDefinition{
*algo, fixed_order_jets.def.R()
};
}
auto R = as_optional<double>(yaml_jets, "R");
if(R){
fixed_order_jets.def = fastjet::JetDefinition{
fixed_order_jets.def.jet_algorithm(), *R
};
}
auto min_pt = as_optional<double>(yaml_jets, "min pt");
if(min_pt) fixed_order_jets.min_pt = *min_pt;
}
catch(missing_option const & exc){
throw missing_option{
std::string{"In entry fixed order jets:\n"} + exc.what()
};
}
catch(invalid_type const & exc){
throw invalid_type{
std::string{"In entry fixed order jets:\n"} + exc.what()
};
}
}
// like std::stod, but throw if not the whole string can be converted
double to_double(std::string const & str){
std::size_t pos;
const double result = std::stod(str, &pos);
if(pos < str.size()){
throw std::invalid_argument(str + " is not a valid double value");
}
return result;
}
// simple (as in non-composite) scale functions
/**
* An example for a simple scale function would be Ht,
* Ht/2 is then composite (take Ht and then divide by 2)
*/
std::unique_ptr<ScaleFunction> make_simple_ScaleFunction_ptr(
std::string const & scale_fun
){
using ret_type = std::unique_ptr<ScaleFunction>;
assert(
scale_fun.empty() ||
(!std::isspace(scale_fun.front()) && !std::isspace(scale_fun.back()))
);
if(scale_fun == "input") return ret_type{new InputScales{}};
if(scale_fun == "Ht") return ret_type{new Ht{}};
if(scale_fun == "max jet pperp") return ret_type{new MaxJetPperp{}};
if(scale_fun == "jet invariant mass"){
return ret_type{new JetInvariantMass{}};
}
try{
const double scale = to_double(scale_fun);
return ret_type{new FixedScale{scale}};
} catch(std::invalid_argument const &){}
throw std::invalid_argument{"Unknown scale choice: " + scale_fun};
}
std::string trim_front(std::string const & str){
const auto new_begin = std::find_if(
begin(str), end(str), [](char c){ return ! std::isspace(c); }
);
return std::string(new_begin, end(str));
}
std::string trim_back(std::string str){
size_t pos = str.size() - 1;
// use guaranteed wrap-around behaviour to check whether we have
// traversed the whole string
for(; pos < str.size() && std::isspace(str[pos]); --pos) {}
str.resize(pos + 1); // note that pos + 1 can be 0
return str;
}
std::unique_ptr<ScaleFunction> make_ScaleFunction_ptr(
std::string const & scale_fun
){
assert(
scale_fun.empty() ||
(!std::isspace(scale_fun.front()) && !std::isspace(scale_fun.back()))
);
const size_t delim = scale_fun.find_first_of("*/");
if(delim == scale_fun.npos){
return make_simple_ScaleFunction_ptr(scale_fun);
}
const std::string first = trim_back(std::string{scale_fun, 0, delim});
const std::string second = trim_front(std::string{scale_fun, delim+1});
double factor;
std::unique_ptr<ScaleFunction> fun;
if(scale_fun[delim] == '/'){
factor = 1/to_double(second);
fun = make_simple_ScaleFunction_ptr(first);
}
else{
assert(scale_fun[delim] == '*');
try{
factor = to_double(second);
fun = make_simple_ScaleFunction_ptr(first);
}
catch(std::invalid_argument const &){
factor = to_double(first);
fun = make_simple_ScaleFunction_ptr(second);
}
}
assert(fun != nullptr);
return std::unique_ptr<ScaleFunction>{
new Product{factor, std::move(fun)}
};
}
ScaleConfig to_ScaleConfig(YAML::Node const & yaml){
ScaleConfig config;
const auto scales = as<std::vector<std::string>>(yaml, "scales");
config.scales.reserve(scales.size());
std::transform(
begin(scales), end(scales), std::back_inserter(config.scales),
make_ScaleFunction_ptr
);
auto scale_factors = as_optional<std::vector<double>>(
yaml, "scale factors"
);
if(scale_factors) config.scale_factors = std::move(*scale_factors);
const auto max_scale_ratio = as_optional<double>(yaml, "max scale ratio");
static_assert(
std::numeric_limits<double>::has_infinity, "infinity not supported"
);
config.max_scale_ratio = max_scale_ratio?
*max_scale_ratio:
std::numeric_limits<double>::infinity()
;
return config;
}
EventTreatMap get_event_treatment(
YAML::Node const & yaml
){
using namespace event_class;
EventTreatMap treat {
{no_2_jets, EventTreatment::discard},
{bad_final_state, EventTreatment::discard}
};
treat.emplace(FKL, as<EventTreatment>(yaml, "FKL"));
const auto unordered_treatment = as<EventTreatment>(yaml, "unordered");
treat.emplace(unordered_forward, unordered_treatment);
treat.emplace(unordered_backward, unordered_treatment);
treat.emplace(nonFKL, as<EventTreatment>(yaml, "non-FKL"));
if(treat[nonFKL] == EventTreatment::reweight){
throw std::invalid_argument{"Cannot reweight non-FKL events"};
}
return treat;
}
Config to_Config(YAML::Node const & yaml){
for(auto const & opt: yaml){
auto const & opt_name = opt.first.as<std::string>();
if(! known.count(opt_name)){
std::cerr << "WARNING: unknown option " + opt_name + "\n";
}
}
Config config;
config.resummation_jets = as<JetParameters>(yaml, "resummation jets");
config.fixed_order_jets = config.resummation_jets;
if(yaml["fixed order jets"]){
update_fixed_order_jet_parameters(config.fixed_order_jets, yaml);
}
config.min_extparton_pt = as<double>(yaml, "min extparton pt");
config.max_ext_soft_pt_fraction = yaml["max ext soft pt fraction"]?
as<double>(yaml, "max ext soft pt fraction"):
std::numeric_limits<double>::infinity()
;
config.trials = as<int>(yaml, "trials");
config.log_correction = as<bool>(yaml, "log correction");
config.unweight = as<bool>(yaml, "unweight");
config.treat = get_event_treatment(yaml);
if(yaml["event output"]){
config.output = as<std::vector<OutputFile>>(yaml, "event output");
}
config.RanLux_init = as_optional<std::string>(yaml, "RanLux init");
config.analysis_parameters = yaml["analysis"]?yaml["analysis"]:YAML::Node{};
config.scale_gen = ScaleGenerator{to_ScaleConfig(yaml)};
config.Higgs_coupling = as<HiggsCouplingSettings>(yaml, "Higgs coupling");
return config;
}
} // anonymous namespace
Config load_config(std::string const & config_file){
try{
return to_Config(YAML::LoadFile(config_file));
}
catch(...){
std::cerr << "Error reading " << config_file << ":\n ";
throw;
}
}
Event ScaleGenerator::operator()(Event ev) const{
assert(ev.variations().empty());
assert(! settings_.scales.empty());
auto const & scales = settings_.scales;
auto const & scale_factors = settings_.scale_factors;
const double max_scale_ratio = settings_.max_scale_ratio;
// check if we are doing scale variation at all
if(scales.size() == 1 && scale_factors.empty()){
ev.central() = (*scales.front())(ev);
return ev;
}
for(auto && base_scale: scales){
const EventParameters cur_base = (*base_scale)(ev);
ev.variations().emplace_back(cur_base);
//multiplicative scale variation
for(double mur_factor: scale_factors){
const double mur = cur_base.mur*mur_factor;
for(double muf_factor: scale_factors){
if(muf_factor == 1. && mur_factor == 1.) continue;
const double muf = cur_base.muf*muf_factor;
if(mur/muf < 1/max_scale_ratio || mur/muf > max_scale_ratio) continue;
ev.variations().emplace_back(
EventParameters{mur, muf, cur_base.weight}
);
}
}
};
ev.central() = (*scales.front())(ev);
return ev;
}
}

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