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diff --git a/Decay/WeakCurrents/ThreePionCzyzCurrent.cc b/Decay/WeakCurrents/ThreePionCzyzCurrent.cc
--- a/Decay/WeakCurrents/ThreePionCzyzCurrent.cc
+++ b/Decay/WeakCurrents/ThreePionCzyzCurrent.cc
@@ -1,458 +1,465 @@
// -*- C++ -*-
//
// This is the implementation of the non-inlined, non-templated member
// functions of the ThreePionCzyzCurrent class.
//
#include "ThreePionCzyzCurrent.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/ParVector.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/Repository/UseRandom.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "Herwig/Decay/ResonanceHelpers.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace Herwig;
namespace {
static const InvEnergy3 InvGeV3 = pow<-3,1>(GeV);
}
ThreePionCzyzCurrent::ThreePionCzyzCurrent()
: mpip_(140*MeV), mpi0_(140*MeV) {
// parameters for I=0
// masses and widths
rhoMasses_ = {0.77609*GeV,1.465*GeV,1.7 *GeV};
rhoWidths_ = {0.14446*GeV,0.31 *GeV,0.235*GeV};
omegaMasses_ = {782.4*MeV,1375*MeV,1631*MeV};
omegaWidths_ = {8.69 *MeV, 250*MeV, 245*MeV};
phiMass_ = 1019.24*MeV;
phiWidth_ = 4.14*MeV;
// couplings
coup_I0_ = {18.20*InvGeV3,-0.87*InvGeV3,-0.77*InvGeV3,
-1.12*InvGeV3,-0.72*InvGeV3,-0.59*InvGeV3};
// parameters for I=1
rhoMasses_I1_ = {0.77609*GeV,1.7*GeV };
rhoWidths_I1_ = {0.14446*GeV,0.26*GeV};
omegaMass_I1_ = 782.59*MeV;
omegaWidth_I1_= 8.49*MeV;
// couplings
sigma_ = -0.1;
GW_pre_ = 1.55/sqrt(2.)*12.924*0.266/GeV;
g_omega_pi_pi_ = 0.185;
addDecayMode(1,-1);
addDecayMode(2,-2);
setInitialModes(2);
}
IBPtr ThreePionCzyzCurrent::clone() const {
return new_ptr(*this);
}
IBPtr ThreePionCzyzCurrent::fullclone() const {
return new_ptr(*this);
}
void ThreePionCzyzCurrent::persistentOutput(PersistentOStream & os) const {
os << ounit(rhoMasses_,GeV) << ounit(rhoWidths_,GeV)
<< ounit(mpip_,GeV) << ounit(mpi0_,GeV)
<< ounit(omegaMasses_,GeV) << ounit(omegaWidths_,GeV)
<< ounit(phiMass_,GeV) << ounit(phiWidth_,GeV) << ounit(coup_I0_,InvGeV3)
<< ounit(rhoMasses_I1_,GeV) << ounit(rhoWidths_I1_,GeV)
<< ounit(omegaMass_I1_,GeV) << ounit(omegaWidth_I1_,GeV)
<< sigma_ << ounit(GW_pre_,1./GeV) << g_omega_pi_pi_ << ounit(GW_,GeV);
}
void ThreePionCzyzCurrent::persistentInput(PersistentIStream & is, int) {
is >> iunit(rhoMasses_,GeV) >> iunit(rhoWidths_,GeV)
>> iunit(mpip_,GeV) >> iunit(mpi0_,GeV)
>> iunit(omegaMasses_,GeV) >> iunit(omegaWidths_,GeV)
>> iunit(phiMass_,GeV) >> iunit(phiWidth_,GeV) >> iunit(coup_I0_,InvGeV3)
>> iunit(rhoMasses_I1_,GeV) >> iunit(rhoWidths_I1_,GeV)
>> iunit(omegaMass_I1_,GeV) >> iunit(omegaWidth_I1_,GeV)
>> sigma_ >> iunit(GW_pre_,1./GeV) >> g_omega_pi_pi_ >> iunit(GW_,GeV);
}
// The following static variable is needed for the type
// description system in ThePEG.
DescribeClass<ThreePionCzyzCurrent,WeakCurrent>
describeHerwigThreePionCzyzCurrent("Herwig::ThreePionCzyzCurrent",
"HwWeakCurrents.so");
void ThreePionCzyzCurrent::Init() {
static ClassDocumentation<ThreePionCzyzCurrent> documentation
("The ThreePionCzyzCurrent class is designed to implement "
"the three pion current for e+e- collisions from Eur.Phys.J. C47 (2006) 617-624",
"The current from \\cite{Czyz:2005as} was used for $\\pi^+\\pi^-\\pi^0$",
"\\bibitem{Czyz:2005as}\n"
"H.~Czyz, A.~Grzelinska, J.~H.~Kuhn and G.~Rodrigo,\n"
"%``Electron-positron annihilation into three pions and the radiative return,''\n"
"Eur.\\ Phys.\\ J.\\ C {\\bf 47} (2006) 617\n"
"doi:10.1140/epjc/s2006-02614-7\n"
"[hep-ph/0512180].\n"
"%%CITATION = doi:10.1140/epjc/s2006-02614-7;%%\n"
"%32 citations counted in INSPIRE as of 01 Aug 2018\n"
);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceRhoMassesI0
("RhoMassesI0",
"The rho masses for the I=0 part of the current",
&ThreePionCzyzCurrent::rhoMasses_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceRhoWidthsI0
("RhoWidthsI0",
"The rho masses for the I=0 part of the current",
&ThreePionCzyzCurrent::rhoWidths_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceOmegaMassesI0
("OmegaMassesI0",
"The omega masses for the I=0 part of the current",
&ThreePionCzyzCurrent::omegaMasses_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceOmegaWidthsI0
("OmegaWidthsI0",
"The omega masses for the I=0 part of the current",
&ThreePionCzyzCurrent::omegaWidths_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static Parameter<ThreePionCzyzCurrent,Energy> interfacePhiMass
("PhiMass",
"The mass of the phi meson",
&ThreePionCzyzCurrent::phiMass_, GeV, 1.0*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static Parameter<ThreePionCzyzCurrent,Energy> interfacePhiWidth
("PhiWidth",
"The width of the phi meson",
&ThreePionCzyzCurrent::phiWidth_, GeV, 1.0*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,InvEnergy3> interfaceCouplingsI0
("CouplingsI0",
"The couplings for the I=0 component",
&ThreePionCzyzCurrent::coup_I0_, InvGeV3, -1, 1.0*InvGeV3, 0*InvGeV3, 0*InvGeV3,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceRhoMassesI1
("RhoMassesI1",
"The rho masses for the I=1 part of the current",
&ThreePionCzyzCurrent::rhoMasses_I1_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static ParVector<ThreePionCzyzCurrent,Energy> interfaceRhoWidthsI1
("RhoWidthsI1",
"The rho masses for the I=0 part of the current",
&ThreePionCzyzCurrent::rhoWidths_I1_, GeV, -1, 0.766*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static Parameter<ThreePionCzyzCurrent,Energy> interfaceOmegaMass
("OmegaMass",
"The mass of the omega meson",
&ThreePionCzyzCurrent::omegaMass_I1_, GeV, 0.78259*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static Parameter<ThreePionCzyzCurrent,Energy> interfaceOmegaWidth
("OmegaWidth",
"The width of the omega meson",
&ThreePionCzyzCurrent::omegaWidth_I1_, GeV, 0.00849*GeV, 0*GeV, 0*GeV,
false, false, Interface::nolimits);
static Parameter<ThreePionCzyzCurrent,double> interfacesigma
("sigma",
"The sigma parameter for the I=1 component",
&ThreePionCzyzCurrent::sigma_, -0.1, -10., 10.0,
false, false, Interface::limited);
static Parameter<ThreePionCzyzCurrent,InvEnergy> interfaceGWPrefactor
("GWPrefactor",
"The prefactor for the G omega coupling",
&ThreePionCzyzCurrent::GW_pre_, 1./GeV, 1.55/sqrt(2.)*12.924*0.266/GeV, 0./GeV, 1e5/GeV,
false, false, Interface::limited);
static Parameter<ThreePionCzyzCurrent,double> interfaceg_omega_pipi
("g_omega_pipi",
"The coupling of the omega meson to two pions",
&ThreePionCzyzCurrent::g_omega_pi_pi_, 0.185, 0.0, 1.0,
false, false, Interface::limited);
}
void ThreePionCzyzCurrent::doinit() {
WeakCurrent::doinit();
GW_ = GW_pre_*sqr(rhoMasses_I1_[0])*g_omega_pi_pi_;
mpip_ = getParticleData(211)->mass();
mpi0_ = getParticleData(111)->mass();
}
// complete the construction of the decay mode for integration
bool ThreePionCzyzCurrent::createMode(int icharge, tcPDPtr resonance,
IsoSpin::IsoSpin Itotal, IsoSpin::I3 i3,
unsigned int imode,PhaseSpaceModePtr mode,
unsigned int iloc,int ires,
PhaseSpaceChannel phase, Energy upp ) {
// check the charge
if(imode>=2 || icharge != 0) return false;
// check the total isospin
if(Itotal!=IsoSpin::IUnknown) {
if(Itotal==IsoSpin::IZero) {
if(i3!=IsoSpin::I3Unknown) return false;
}
else if(Itotal==IsoSpin::IOne) {
if(i3!=IsoSpin::I3Unknown&&
i3!=IsoSpin::I3One) return false;
}
else
return false;
}
// check the kinematics
tPDPtr pip = getParticleData(ParticleID::piplus);
tPDPtr pim = getParticleData(ParticleID::piminus);
tPDPtr pi0 = getParticleData(ParticleID::pi0);
if(2*pip->mass()+pi0->mass()>upp) return false;
// resonaces we need
tPDPtr omega[4] = {getParticleData( 223),getParticleData( 100223),getParticleData( 30223),
getParticleData( 333)};
tPDPtr rho0[3] = {getParticleData( 113),getParticleData( 100113),getParticleData( 30113)};
tPDPtr rhop[3] = {getParticleData( 213),getParticleData( 100213),getParticleData( 30213)};
tPDPtr rhom[3] = {getParticleData(-213),getParticleData(-100213),getParticleData(-30213)};
// DecayPhaseSpaceChannelPtr newchannel;
// omega/omega -> rho pi
for(unsigned int ix=0;ix<4;++ix) {
if(resonance && resonance != omega[ix]) continue;
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[ix],
ires+1,rhom[0],ires+1,iloc+1,
ires+2,iloc+2,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[ix],
ires+1,rhop[0],ires+1,iloc+2,
ires+2,iloc+1,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[ix],
ires+1,rho0[0],ires+1,iloc+3,
ires+2,iloc+1,ires+2,iloc+2));
}
// phi rho 1450
if(!resonance || resonance ==omega[3]) {
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[3],
ires+1,rhom[1],ires+1,iloc+1,
ires+2,iloc+2,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[3],
ires+1,rhop[1],ires+1,iloc+2,
ires+2,iloc+1,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[3],
ires+1,rho0[1],ires+1,iloc+3,
ires+2,iloc+1,ires+2,iloc+2));
}
// // omega 1650 rho 1700
if(!resonance || resonance ==omega[2]) {
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[2],
ires+1,rhom[2],ires+1,iloc+1,
ires+2,iloc+2,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[2],
ires+1,rhop[2],ires+1,iloc+2,
ires+2,iloc+1,ires+2,iloc+3));
mode->addChannel((PhaseSpaceChannel(phase),ires,omega[2],
ires+1,rho0[2],ires+1,iloc+3,
ires+2,iloc+1,ires+2,iloc+2));
}
// reset the masses in the intergrators
for(unsigned int ix=0;ix<3;++ix) {
if(ix<rhoMasses_.size()) {
if(rho0[ix])
mode->resetIntermediate(rho0[ix],rhoMasses_[ix],rhoWidths_[ix]);
if(rhop[ix])
mode->resetIntermediate(rhop[ix],rhoMasses_[ix],rhoWidths_[ix]);
if(rhom[ix])
mode->resetIntermediate(rhom[ix],rhoMasses_[ix],rhoWidths_[ix]);
}
}
for(unsigned int ix=0;ix<omegaMasses_.size();++ix) {
if(omega[ix])
mode->resetIntermediate(omega[ix],omegaMasses_[ix],omegaWidths_[ix]);
}
if(omega[3])
mode->resetIntermediate(omega[3],phiMass_,phiWidth_);
return true;
}
// the particles produced by the current
tPDVector ThreePionCzyzCurrent::particles(int icharge, unsigned int,
int,int) {
assert(icharge==0);
// return the answer
return {getParticleData(ParticleID::piplus),
getParticleData(ParticleID::piminus),
getParticleData(ParticleID::pi0)};
}
namespace {
Complex HChannel(const int & irho,
const Energy & mass, const Energy & width, const Energy2 & sp, const Energy2 & sm,
const Energy2 & s0, const Energy & mp, const Energy & m0) {
if(irho<0)
return Resonance::H(mass,width,sp,sm,s0,mp,m0);
else if(irho==0)
return Resonance::BreitWignerPWave(sm,mass,width,mp,m0);
else if(irho==1)
return Resonance::BreitWignerPWave(sp,mass,width,mp,m0);
else if(irho==2)
return Resonance::BreitWignerPWave(s0,mass,width,mp,mp);
else
assert(false);
}
}
// hadronic current
vector<LorentzPolarizationVectorE>
ThreePionCzyzCurrent::current(tcPDPtr resonance,
IsoSpin::IsoSpin Itotal, IsoSpin::I3 i3,
const int, const int ichan, Energy & scale,
const tPDVector & ,
const vector<Lorentz5Momentum> & momenta,
DecayIntegrator::MEOption) const {
// check the total isospin
if(Itotal!=IsoSpin::IUnknown) {
if(Itotal==IsoSpin::IZero) {
- if(i3!=IsoSpin::I3Unknown) return vector<LorentzPolarizationVectorE>();
+ // if(i3!=IsoSpin::I3Unknown) return vector<LorentzPolarizationVectorE>();
+ if(i3!=IsoSpin::I3Zero) return vector<LorentzPolarizationVectorE>();
}
else if(Itotal==IsoSpin::IOne) {
+ //if(i3!=IsoSpin::I3Unknown&&
+ // i3!=IsoSpin::I3One) return vector<LorentzPolarizationVectorE>();
if(i3!=IsoSpin::I3Unknown&&
- i3!=IsoSpin::I3One) return vector<LorentzPolarizationVectorE>();
+ i3!=IsoSpin::I3Zero) return vector<LorentzPolarizationVectorE>();
}
else
return vector<LorentzPolarizationVectorE>();
}
useMe();
// calculate q2,s1,s2,s3
Lorentz5Momentum q;
for(unsigned int ix=0;ix<momenta.size();++ix) q+=momenta[ix];
q.rescaleMass();
scale=q.mass();
Energy2 q2=q.mass2();
Energy2 sm = (momenta[1]+momenta[2]).m2();
Energy2 sp = (momenta[0]+momenta[2]).m2();
Energy2 s0 = (momenta[0]+momenta[1]).m2();
int irho=-1;
if(ichan>=0) {
irho = ichan%3;
}
// isospin zero part of the current
complex<InvEnergy3> F_I0(ZERO);
- if(Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IOne) {
+ // if(Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IOne) {
+ if((Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IZero) && !resonance && ichan<0) {
+ cout<<"first if"<<endl;
// compute H rho
Complex Hrho = HChannel(irho,rhoMasses_[0],rhoWidths_[0],sp,sm,s0,mpip_,mpi0_);
// terms in the current
if((!resonance || resonance->id() == 223) && ichan<=2) {
F_I0 += Hrho*coup_I0_[0]*Resonance::BreitWignerFW(q2,omegaMasses_[0],omegaWidths_[0]);
}
if((!resonance || resonance->id() == 333) && (ichan<0 || (ichan>=9&&ichan<=11))) {
F_I0 += Hrho*coup_I0_[1]*Resonance::BreitWignerFW(q2,phiMass_ ,phiWidth_ );
}
if((!resonance || resonance->id() == 100223) && (ichan<0 || (ichan>=3&&ichan<=5))) {
F_I0 += Hrho*coup_I0_[2]*Resonance::BreitWignerFW(q2,omegaMasses_[1],omegaWidths_[1]);
}
if((!resonance || resonance->id() == 30223) && (ichan<0 || (ichan>=6&&ichan<=8))) {
F_I0 += Hrho*coup_I0_[3]*Resonance::BreitWignerFW(q2,omegaMasses_[2],omegaWidths_[2]);
}
if((!resonance || resonance->id() == 333) && (ichan<0 || (ichan>=12&&ichan<=14))) {
F_I0 += coup_I0_[4]*HChannel(irho,rhoMasses_[1],rhoWidths_[1],sp,sm,s0,mpip_,mpi0_)*
Resonance::BreitWignerFW(q2,phiMass_,phiWidth_);
}
if((!resonance || resonance->id() == 100223) && (ichan<0 || (ichan>=15&&ichan<=17))) {
F_I0 += coup_I0_[5]*HChannel(irho,rhoMasses_[2],rhoWidths_[2],sp,sm,s0,mpip_,mpi0_)*
Resonance::BreitWignerFW(q2,omegaMasses_[2],omegaWidths_[2]);
}
}
// isospin = 1
complex<InvEnergy3> F_I1(ZERO);
- if((Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IZero) && !resonance && ichan<0) {
+ // if((Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IZero) && !resonance && ichan<0) {
+ if(Itotal==IsoSpin::IUnknown || Itotal==IsoSpin::IOne) {
+ cout<<"second if"<<endl;
F_I1 = GW_*
Resonance::BreitWignerFW(q2,omegaMass_I1_,omegaWidth_I1_)/sqr(omegaMass_I1_)*
(Resonance::BreitWignerPWave(s0,rhoMasses_I1_[0],
rhoWidths_I1_[0],mpip_,mpip_)/sqr(rhoMasses_I1_[0])+
sigma_*Resonance::BreitWignerPWave(s0,rhoMasses_I1_[1],
rhoWidths_I1_[1],mpip_,mpip_)/sqr(rhoMasses_I1_[1]));
}
// the current
LorentzPolarizationVector vect = (F_I0+F_I1)*
Helicity::epsilon(momenta[0],
momenta[1],
momenta[2]);
// factor to get dimensions correct
return vector<LorentzPolarizationVectorE>(1,q.mass()*vect);
}
bool ThreePionCzyzCurrent::accept(vector<int> id) {
if(id.size()!=3){return false;}
unsigned int npiplus(0),npi0(0),npiminus(0);
for(unsigned int ix=0;ix<id.size();++ix) {
if(id[ix]==ParticleID::piplus) ++npiplus;
else if(id[ix]==ParticleID::piminus) ++npiplus;
else if(id[ix]==ParticleID::pi0) ++npi0;
}
return (npiplus==1&&npiminus==1&&npi0==1);
}
// the decay mode
unsigned int ThreePionCzyzCurrent::decayMode(vector<int> ) {
return 0;
}
// output the information for the database
void ThreePionCzyzCurrent::dataBaseOutput(ofstream & output,bool header,
bool create) const {
if(header) output << "update decayers set parameters=\"";
if(create) output << "create Herwig::ThreePionCzyzCurrent "
<< name() << " HwWeakCurrents.so\n";
for(unsigned int ix=0;ix<rhoMasses_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":RhoMassesI0 " << ix << " " << rhoMasses_[ix]/GeV << "\n";
}
for(unsigned int ix=0;ix<rhoWidths_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":RhoWidthsI0 " << ix << " " << rhoWidths_[ix]/GeV << "\n";
}
for(unsigned int ix=0;ix<omegaMasses_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":OmegaMassesI0 " << ix << " " << omegaMasses_[ix]/GeV << "\n";
}
for(unsigned int ix=0;ix<omegaWidths_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":OmegaWidthsI0 " << ix << " " << omegaWidths_[ix]/GeV << "\n";
}
output << "newdef " << name() << ":PhiMass " << phiMass_/GeV << "\n";
output << "newdef " << name() << ":PhiWidth " << phiWidth_/GeV << "\n";
for(unsigned int ix=0;ix<coup_I0_.size();++ix) {
if(ix<6) output << "newdef ";
else output << "insert ";
output << name() << ":CouplingsI0 " << ix << " " << coup_I0_[ix]*GeV*GeV2 << "\n";
}
for(unsigned int ix=0;ix<rhoMasses_I1_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":RhoMassesI1 " << ix << " " << rhoMasses_I1_[ix]/GeV << "\n";
}
for(unsigned int ix=0;ix<rhoWidths_I1_.size();++ix) {
if(ix<3) output << "newdef ";
else output << "insert ";
output << name() << ":RhoWidthsI1 " << ix << " " << rhoWidths_I1_[ix]/GeV << "\n";
}
output << "newdef " << name() << ":OmegaMass " << omegaMass_I1_/GeV << "\n";
output << "newdef " << name() << ":OmegaWidth " << omegaWidth_I1_/GeV << "\n";
output << "newdef " << name() << ":sigma " << sigma_ << "\n";
output << "newdef " << name() << ":GWPrefactor " << GW_pre_*GeV << "\n";
output << "newdef " << name() << ":g_omega_pipi " << g_omega_pi_pi_ << "\n";
WeakCurrent::dataBaseOutput(output,false,false);
if(header) output << "\n\" where BINARY ThePEGName=\""
<< fullName() << "\";" << endl;
}

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