diff --git a/FixedOrderGen/include/EventGenerator.hh b/FixedOrderGen/include/EventGenerator.hh
index c696c72..e345a81 100644
--- a/FixedOrderGen/include/EventGenerator.hh
+++ b/FixedOrderGen/include/EventGenerator.hh
@@ -1,65 +1,65 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#pragma once
#include "HEJ/MatrixElement.hh"
#include "HEJ/optional.hh"
#include "HEJ/PDF.hh"
#include "HEJ/RNG.hh"
#include "Beam.hh"
#include "Decay.hh"
#include "JetParameters.hh"
#include "Process.hh"
#include "Status.hh"
namespace HEJ{
class Event;
class HiggsCouplingSettings;
class ScaleGenerator;
class EWConstants;
}
//! Namespace for HEJ Fixed Order Generator
namespace HEJFOG{
class EventGenerator{
public:
EventGenerator(
Process process,
Beam beam,
HEJ::ScaleGenerator scale_gen,
JetParameters jets,
int pdf_id,
double subl_change,
unsigned int subl_channels,
- ParticlesDecayMap particles_decays,
+ ParticlesDecayMap particle_decays,
HEJ::HiggsCouplingSettings Higgs_coupling,
HEJ::EWConstants ew_parameters,
HEJ::RNG & ran
);
HEJ::optional<HEJ::Event> gen_event();
Status status() const {
return status_;
}
private:
HEJ::PDF pdf_;
HEJ::MatrixElement ME_;
HEJ::ScaleGenerator scale_gen_;
Process process_;
JetParameters jets_;
Beam beam_;
Status status_;
double subl_change_;
unsigned int subl_channels_;
- ParticlesDecayMap particles_decays_;
+ ParticlesDecayMap particle_decays_;
HEJ::EWConstants ew_parameters_;
std::reference_wrapper<HEJ::RNG> ran_;
};
}
diff --git a/FixedOrderGen/include/PhaseSpacePoint.hh b/FixedOrderGen/include/PhaseSpacePoint.hh
index 0764045..16bcd9d 100644
--- a/FixedOrderGen/include/PhaseSpacePoint.hh
+++ b/FixedOrderGen/include/PhaseSpacePoint.hh
@@ -1,230 +1,230 @@
/** \file PhaseSpacePoint.hh
* \brief Contains the PhaseSpacePoint Class
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#pragma once
#include <bitset>
#include <vector>
#include "HEJ/Event.hh"
#include "HEJ/Particle.hh"
#include "HEJ/PDF.hh"
#include "HEJ/PDG_codes.hh"
#include "HEJ/RNG.hh"
#include "JetParameters.hh"
#include "Decay.hh"
#include "Status.hh"
namespace HEJ{
class EWConstants;
}
namespace HEJFOG{
class Process;
using HEJ::Particle;
//! A point in resummation phase space
class PhaseSpacePoint{
public:
//! Default PhaseSpacePoint Constructor
PhaseSpacePoint() = delete;
//! PhaseSpacePoint Constructor
/**
* @param proc The process to generate
* @param jet_properties Jet defintion & cuts
* @param pdf The pdf set (used for sampling)
* @param E_beam Energie of the beam
* @param subl_chance Chance to turn a potentially unordered
* emission into an actual one
* @param subl_channels Possible subleading channels.
* see HEJFOG::Subleading
* @param particle_properties Properties of producted boson
*
* Initially, only FKL phase space points are generated. subl_chance gives
* the change of turning one emissions into a subleading configuration,
* i.e. either unordered or central quark/anti-quark pair. Unordered
* emissions require that the most extremal emission in any direction is
* a quark or anti-quark and the next emission is a gluon. Quark/anti-quark
* pairs are only generated for W processes. At most one subleading
* emission will be generated in this way.
*/
PhaseSpacePoint(
Process const & proc,
JetParameters const & jet_properties,
HEJ::PDF & pdf, double E_beam,
double subl_chance,
unsigned int subl_channels,
- ParticlesDecayMap const & particles_decays,
+ ParticlesDecayMap const & particle_decays,
HEJ::EWConstants const & ew_parameters,
HEJ::RNG & ran
);
//! Get Weight Function
/**
* @returns Weight of Event
*/
double weight() const{
return weight_;
}
Status status() const{
return status_;
}
//! Get Incoming Function
/**
* @returns Incoming Particles
*/
std::array<Particle, 2> const & incoming() const{
return incoming_;
}
//! Get Outgoing Function
/**
* @returns Outgoing Particles
*/
std::vector<Particle> const & outgoing() const{
return outgoing_;
}
std::unordered_map<size_t, std::vector<Particle>> const & decays() const{
return decays_;
}
private:
/**
* @internal
* @brief Generate LO parton momentum
*
* @param count Number of partons to generate
* @param is_pure_jets If true ensures momentum conservation in x and y
* @param jet_param Jet properties to fulfil
* @param max_pt max allowed pt for a parton (typically E_CMS)
* @param ran Random Number Generator
*
* @returns Momentum of partons
*
* Ensures that each parton is in its own jet.
* Generation is independent of parton flavour. Output is sorted in rapidity.
*/
std::vector<fastjet::PseudoJet> gen_LO_partons(
int count, bool is_pure_jets,
JetParameters const & jet_param,
double max_pt,
HEJ::RNG & ran
);
Particle gen_boson(
HEJ::ParticleID bosonid, double mass, double width,
HEJ::RNG & ran
);
template<class ParticleMomenta>
fastjet::PseudoJet gen_last_momentum(
ParticleMomenta const & other_momenta,
double mass_square, double y
) const;
bool jets_ok(
std::vector<fastjet::PseudoJet> const & Born_jets,
std::vector<fastjet::PseudoJet> const & partons
) const;
/**
* @internal
* @brief Generate incoming partons according to the PDF
*
* @param uf Scale used in the PDF
*/
void reconstruct_incoming(
Process const & proc, unsigned int subl_channels,
HEJ::PDF & pdf, double E_beam,
double uf,
HEJ::RNG & ran
);
/**
* @internal
* @brief Returns list of all allowed initial states partons
*/
std::array<std::bitset<11>,2> filter_partons(
Process const & proc, unsigned int const subl_channels,
HEJ::RNG & ran
);
HEJ::ParticleID generate_incoming_id(
size_t beam_idx, double x, double uf, HEJ::PDF & pdf,
std::bitset<11> allowed_partons, HEJ::RNG & ran
);
bool momentum_conserved(double ep) const;
HEJ::Particle const & most_backward_FKL(
std::vector<HEJ::Particle> const & partons
) const;
HEJ::Particle const & most_forward_FKL(
std::vector<HEJ::Particle> const & partons
) const;
HEJ::Particle & most_backward_FKL(std::vector<HEJ::Particle> & partons) const;
HEJ::Particle & most_forward_FKL(std::vector<HEJ::Particle> & partons) const;
bool extremal_FKL_ok(
std::vector<fastjet::PseudoJet> const & partons
) const;
double random_normal(double stddev, HEJ::RNG & ran);
/**
* @internal
* @brief Turns a FKL configuration into a subleading one
*
* @param chance Change to switch to subleading configuration
* @param channels Allowed channels for subleading process
* @param proc Process to decide which subleading
* configurations are allowed
*
* With a chance of "chance" the FKL configuration is either turned into
* a unordered configuration or, for A/W/Z bosons, a configuration with
* a central quark/anti-quark pair.
*/
void maybe_turn_to_subl(double chance, unsigned int channels,
Process const & proc, HEJ::RNG & ran);
void turn_to_uno(bool can_be_uno_backward, bool can_be_uno_forward, HEJ::RNG & ran);
void turn_to_qqx(bool allow_strange, HEJ::RNG & ran);
//! decay where we select the decay channel
std::vector<Particle> decay_boson(
HEJ::Particle const & parent,
std::vector<Decay> const & decays,
HEJ::RNG & ran
);
//! generate decay products of a boson
std::vector<Particle> decay_boson(
HEJ::Particle const & parent,
std::vector<HEJ::ParticleID> const & decays,
HEJ::RNG & ran
);
/// @brief setup outgoing partons to ensure correct coupling to boson
void couple_boson(HEJ::ParticleID boson, HEJ::RNG & ran);
Decay select_decay_channel(
std::vector<Decay> const & decays,
HEJ::RNG & ran
);
double gen_hard_pt(
int np, double ptmin, double ptmax, double y,
HEJ::RNG & ran
);
double gen_soft_pt(int np, double ptmax, HEJ::RNG & ran);
double gen_parton_pt(
int count, JetParameters const & jet_param, double ptmax, double y,
HEJ::RNG & ran
);
double weight_;
Status status_;
std::array<Particle, 2> incoming_;
std::vector<Particle> outgoing_;
//! Particle decays in the format {outgoing index, decay products}
std::unordered_map<size_t, std::vector<Particle>> decays_;
};
HEJ::Event::EventData to_EventData(PhaseSpacePoint const & psp);
}
diff --git a/FixedOrderGen/include/config.hh b/FixedOrderGen/include/config.hh
index 06a2487..d302168 100644
--- a/FixedOrderGen/include/config.hh
+++ b/FixedOrderGen/include/config.hh
@@ -1,45 +1,45 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#pragma once
#include "yaml-cpp/yaml.h"
#include "HEJ/HiggsCouplingSettings.hh"
#include "HEJ/optional.hh"
#include "HEJ/config.hh"
#include "HEJ/output_formats.hh"
#include "HEJ/exceptions.hh"
#include "HEJ/EWConstants.hh"
#include "Beam.hh"
#include "Decay.hh"
#include "JetParameters.hh"
#include "Process.hh"
#include "UnweightSettings.hh"
namespace HEJFOG{
struct Config{
Process process;
int events;
JetParameters jets;
Beam beam;
int pdf_id;
double subleading_fraction;
unsigned int subleading_channels; //! < see HEJFOG::Subleading
- ParticlesDecayMap particles_decays;
+ ParticlesDecayMap particle_decays;
YAML::Node analysis_parameters;
HEJ::ScaleConfig scales;
std::vector<HEJ::OutputFile> output;
HEJ::RNGConfig rng;
HEJ::HiggsCouplingSettings Higgs_coupling;
HEJ::EWConstants ew_parameters;
HEJ::optional<UnweightSettings> unweight;
};
Config load_config(std::string const & config_file);
}
diff --git a/FixedOrderGen/src/EventGenerator.cc b/FixedOrderGen/src/EventGenerator.cc
index 3d2dfe6..8058577 100644
--- a/FixedOrderGen/src/EventGenerator.cc
+++ b/FixedOrderGen/src/EventGenerator.cc
@@ -1,90 +1,90 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#include "EventGenerator.hh"
#include "Process.hh"
#include "Beam.hh"
#include "JetParameters.hh"
#include "PhaseSpacePoint.hh"
#include "HEJ/config.hh"
#include "HEJ/Event.hh"
#include "HEJ/EWConstants.hh"
namespace HEJFOG{
EventGenerator::EventGenerator(
Process process,
Beam beam,
HEJ::ScaleGenerator scale_gen,
JetParameters jets,
int pdf_id,
double subl_change,
unsigned int subl_channels,
- ParticlesDecayMap particles_decays,
+ ParticlesDecayMap particle_decays,
HEJ::HiggsCouplingSettings Higgs_coupling,
HEJ::EWConstants ew_parameters,
HEJ::RNG & ran
):
pdf_{pdf_id, beam.particles[0], beam.particles[1]},
ME_{
[this](double mu){ return pdf_.Halphas(mu); },
HEJ::MatrixElementConfig{
false,
std::move(Higgs_coupling),
ew_parameters
}
},
scale_gen_{std::move(scale_gen)},
process_{std::move(process)},
jets_{std::move(jets)},
beam_{std::move(beam)},
subl_change_{subl_change},
subl_channels_{subl_channels},
- particles_decays_{std::move(particles_decays)},
+ particle_decays_{std::move(particle_decays)},
ew_parameters_{ew_parameters},
ran_{ran}
{
}
HEJ::optional<HEJ::Event> EventGenerator::gen_event(){
HEJFOG::PhaseSpacePoint psp{
process_,
jets_,
pdf_, beam_.energy,
subl_change_, subl_channels_,
- particles_decays_,
+ particle_decays_,
ew_parameters_,
ran_
};
status_ = psp.status();
if(status_ != good) return {};
HEJ::Event ev = scale_gen_(
HEJ::Event{
to_EventData( std::move(psp) ).cluster( jets_.def, jets_.min_pt)
}
);
ev.generate_colours(ran_);
const double shat = HEJ::shat(ev);
const double xa = (ev.incoming()[0].E()-ev.incoming()[0].pz())/(2.*beam_.energy);
const double xb = (ev.incoming()[1].E()+ev.incoming()[1].pz())/(2.*beam_.energy);
// evaluate matrix element
ev.parameters() *= ME_.tree(ev)/(shat*shat);
// and PDFs
ev.central().weight *= pdf_.pdfpt(0,xa,ev.central().muf, ev.incoming()[0].type);
ev.central().weight *= pdf_.pdfpt(0,xb,ev.central().muf, ev.incoming()[1].type);
for(size_t i = 0; i < ev.variations().size(); ++i){
auto & var = ev.variations(i);
var.weight *= pdf_.pdfpt(0,xa,var.muf, ev.incoming()[0].type);
var.weight *= pdf_.pdfpt(0,xb,var.muf, ev.incoming()[1].type);
}
return ev;
}
}
diff --git a/FixedOrderGen/src/PhaseSpacePoint.cc b/FixedOrderGen/src/PhaseSpacePoint.cc
index 63c7e2b..3ff9ddb 100644
--- a/FixedOrderGen/src/PhaseSpacePoint.cc
+++ b/FixedOrderGen/src/PhaseSpacePoint.cc
@@ -1,693 +1,693 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#include "PhaseSpacePoint.hh"
#include <algorithm>
#include "CLHEP/Vector/LorentzVector.h"
#include "HEJ/Constants.hh"
#include "HEJ/EWConstants.hh"
#include "HEJ/exceptions.hh"
#include "HEJ/kinematics.hh"
#include "HEJ/Particle.hh"
#include "HEJ/utility.hh"
#include "Process.hh"
#include "Subleading.hh"
using namespace HEJ;
namespace HEJFOG{
static_assert(
std::numeric_limits<double>::has_quiet_NaN,
"no quiet NaN for double"
);
constexpr double NaN = std::numeric_limits<double>::quiet_NaN();
HEJ::Event::EventData to_EventData(PhaseSpacePoint const & psp){
HEJ::Event::EventData result;
result.incoming = psp.incoming();
assert(result.incoming.size() == 2);
result.outgoing=psp.outgoing();
// technically Event::EventData doesn't have to be sorted,
// but PhaseSpacePoint should be anyway
assert(
std::is_sorted(
begin(result.outgoing), end(result.outgoing),
HEJ::rapidity_less{}
)
);
assert(result.outgoing.size() >= 2);
result.decays=psp.decays();
result.parameters.central= {NaN, NaN, psp.weight() };
return result;
}
namespace{
bool can_swap_to_uno(
HEJ::Particle const & p1, HEJ::Particle const & p2
){
return is_parton(p1)
&& p1.type != pid::gluon
&& p2.type == pid::gluon;
}
size_t count_gluons(std::vector<Particle>::const_iterator first,
std::vector<Particle>::const_iterator last){
return std::count_if(first, last, [](Particle const & p)
{return p.type == pid::gluon;});
}
/** assumes FKL configurations between first and last,
* else there can be a quark in a non-extreme position
* e.g. uno configuration gqg would pass
*/
bool can_change_to_qqx(
std::vector<Particle>::const_iterator first,
std::vector<Particle>::const_iterator last){
return 1 < count_gluons(first,last);
}
bool is_AWZ_proccess(Process const & proc){
return proc.boson && is_AWZ_boson(*proc.boson);
}
bool is_up_type(Particle const & part){
return HEJ::is_anyquark(part) && !(abs(part.type)%2);
}
bool is_down_type(Particle const & part){
return HEJ::is_anyquark(part) && abs(part.type)%2;
}
bool can_couple_to_W(Particle const & part, pid::ParticleID const W_id){
const int W_charge = W_id>0?1:-1;
return abs(part.type)<5
&& ( (W_charge*part.type > 0 && is_up_type(part))
|| (W_charge*part.type < 0 && is_down_type(part)) );
}
}
void PhaseSpacePoint::maybe_turn_to_subl(
double chance,
unsigned int const channels,
Process const & proc,
HEJ::RNG & ran
){
if(proc.njets <= 2) return;
assert(outgoing_.size() >= 2);
// decide what kind of subleading process is allowed
bool allow_uno = false;
bool allow_strange = true;
const size_t nout = outgoing_.size();
const bool can_be_uno_backward = (channels&Subleading::uno)
&& can_swap_to_uno(outgoing_[0], outgoing_[1]);
const bool can_be_uno_forward = (channels&Subleading::uno)
&& can_swap_to_uno(outgoing_[nout-1], outgoing_[nout-2]);
allow_uno = can_be_uno_backward || can_be_uno_forward;
bool allow_qqx = false;
if(is_AWZ_proccess(proc)) {
allow_qqx = (channels&Subleading::qqx)
&& can_change_to_qqx(outgoing_.cbegin(), outgoing_.cend());
if(std::none_of(outgoing_.cbegin(), outgoing_.cend(),
[&proc](Particle const & p){ return can_couple_to_W(p, *proc.boson);})) {
// enforce qqx if A/W/Z can't couple somewhere else
assert(allow_qqx);
allow_uno = false;
chance = 1.;
// strange not allowed for W
if(abs(*proc.boson)== pid::Wp) allow_strange = false;
}
}
if(!allow_uno && !allow_qqx) return;
if(ran.flat() < chance){
weight_ /= chance;
if(allow_uno && !allow_qqx){
turn_to_uno(can_be_uno_backward, can_be_uno_forward, ran);
} else if (!allow_uno && allow_qqx) {
turn_to_qqx(allow_strange, ran);
} else {
assert( allow_uno && allow_qqx);
if(ran.flat() < 0.5) turn_to_uno(can_be_uno_backward, can_be_uno_forward, ran);
else turn_to_qqx(allow_strange, ran);
weight_ *= 2.;
}
} else weight_ /= 1 - chance;
}
void PhaseSpacePoint::turn_to_uno(
const bool can_be_uno_backward, const bool can_be_uno_forward,
HEJ::RNG & ran
){
if(!can_be_uno_backward && !can_be_uno_forward) return;
const size_t nout = outgoing_.size();
if(can_be_uno_backward && can_be_uno_forward){
if(ran.flat() < 0.5){
std::swap(outgoing_[0].type, outgoing_[1].type);
} else {
std::swap(outgoing_[nout-1].type, outgoing_[nout-2].type);
}
weight_ *= 2.;
} else if(can_be_uno_backward){
std::swap(outgoing_[0].type, outgoing_[1].type);
} else {
assert(can_be_uno_forward);
std::swap(outgoing_[nout-1].type, outgoing_[nout-2].type);
}
}
void PhaseSpacePoint::turn_to_qqx(const bool allow_strange, HEJ::RNG & ran){
/// find first and last gluon in FKL chain
auto first = std::find_if(outgoing_.begin(), outgoing_.end(),
[](Particle const & p){return p.type == pid::gluon;});
std::vector<Particle*> FKL_gluons;
for(auto p = first; p!=outgoing_.end(); ++p){
if(p->type == pid::gluon) FKL_gluons.push_back(&*p);
else if(is_anyquark(*p)) break;
}
const size_t ng = FKL_gluons.size();
if(ng < 2)
throw std::logic_error("not enough gluons to create qqx");
// select flavour of quark
const double r1 = 2.*ran.flat()-1.;
const double max_flavour = allow_strange?n_f:n_f-1;
weight_ *= max_flavour*2;
int flavour = pid::down + std::floor(std::abs(r1)*max_flavour);
flavour*=r1<0.?-1:1;
// select gluon for switch
const size_t idx = floor((ng-1) * ran.flat());
weight_ *= (ng-1);
FKL_gluons[idx]->type = ParticleID(flavour);
FKL_gluons[idx+1]->type = ParticleID(-flavour);
}
template<class ParticleMomenta>
fastjet::PseudoJet PhaseSpacePoint::gen_last_momentum(
ParticleMomenta const & other_momenta,
const double mass_square, const double y
) const {
std::array<double,2> pt{0.,0.};
for (auto const & p: other_momenta) {
pt[0]-= p.px();
pt[1]-= p.py();
}
const double mperp = sqrt(pt[0]*pt[0]+pt[1]*pt[1]+mass_square);
const double pz=mperp*sinh(y);
const double E=mperp*cosh(y);
return {pt[0], pt[1], pz, E};
}
namespace {
//! adds a particle to target (in correct rapidity ordering)
//! @returns positon of insertion
auto insert_particle(std::vector<HEJ::Particle> & target,
HEJ::Particle && particle
){
const auto pos = std::upper_bound(
begin(target),end(target),particle,rapidity_less{}
);
target.insert(pos, std::move(particle));
return pos;
}
}
PhaseSpacePoint::PhaseSpacePoint(
Process const & proc,
JetParameters const & jet_param,
HEJ::PDF & pdf, double E_beam,
double const subl_chance,
unsigned int const subl_channels,
- ParticlesDecayMap const & particles_decays,
+ ParticlesDecayMap const & particle_decays,
HEJ::EWConstants const & ew_parameters,
HEJ::RNG & ran
)
{
// auto proc{ proc_in }; // @TODO remove
assert(proc.njets >= 2);
status_ = good;
weight_ = 1;
const int nout = proc.njets + (proc.boson?1:0) + proc.boson_decay.size();
outgoing_.reserve(nout);
// generate parton momenta
const bool is_pure_jets = (nout == proc.njets);
auto partons = gen_LO_partons(
proc.njets, is_pure_jets, jet_param, E_beam, ran
);
// pre fill flavour with gluons
for(auto&& p_out: partons) {
outgoing_.emplace_back(Particle{pid::gluon, std::move(p_out), {}});
}
if(status_ != good) return;
if(proc.boson){ // decay boson
const auto & boson_prop = ew_parameters.prop(*proc.boson) ;
auto boson{ gen_boson(*proc.boson, boson_prop.mass, boson_prop.width, ran) };
const auto pos{insert_particle(outgoing_, std::move(boson))};
const size_t boson_idx = std::distance(begin(outgoing_), pos);
- const auto & boson_decay = particles_decays.find(*proc.boson);
+ const auto & boson_decay = particle_decays.find(*proc.boson);
if( !proc.boson_decay.empty() ){ // decay given in proc
decays_.emplace(
boson_idx,
decay_boson(outgoing_[boson_idx], proc.boson_decay, ran)
);
- } else if( boson_decay != particles_decays.end()
+ } else if( boson_decay != particle_decays.end()
&& !boson_decay->second.empty() ){ // decay given explicitly
decays_.emplace(
boson_idx,
decay_boson(outgoing_[boson_idx], boson_decay->second, ran)
);
}
}
// normalisation of momentum-conserving delta function
weight_ *= pow(2*M_PI, 4);
/** @TODO
* uf (jet_param.min_pt) doesn't correspond to our final scale choice.
* The HEJ scale generators currently expect a full event as input,
* so fixing this is not completely trivial
*/
reconstruct_incoming(proc, subl_channels, pdf, E_beam, jet_param.min_pt, ran);
if(status_ != good) return;
// set outgoing states
most_backward_FKL(outgoing_).type = incoming_[0].type;
most_forward_FKL(outgoing_).type = incoming_[1].type;
maybe_turn_to_subl(subl_chance, subl_channels, proc, ran);
if(proc.boson) couple_boson(*proc.boson, ran);
}
double PhaseSpacePoint::gen_hard_pt(
int np , double ptmin, double ptmax, double y,
HEJ::RNG & ran
) {
// heuristic parameters for pt sampling
const double ptpar = ptmin + np/5.;
const double arg_small_y = atan((ptmax - ptmin)/ptpar);
const double y_cut = 3.;
const double r1 = ran.flat();
if(y < y_cut){
const double pt = ptmin + ptpar*tan(r1*arg_small_y);
const double temp = cos(r1*arg_small_y);
weight_ *= pt*ptpar*arg_small_y/(temp*temp);
return pt;
}
const double ptpar2 = ptpar/(1 + 5*(y-y_cut));
const double temp = 1. - std::exp((ptmin-ptmax)/ptpar2);
const double pt = ptmin - ptpar2*std::log(1-r1*temp);
weight_ *= pt*ptpar2*temp/(1-r1*temp);
return pt;
}
double PhaseSpacePoint::gen_soft_pt(int np, double max_pt, HEJ::RNG & ran) {
constexpr double ptpar = 4.;
const double r = ran.flat();
const double pt = max_pt + ptpar/np*std::log(r);
weight_ *= pt*ptpar/(np*r);
return pt;
}
double PhaseSpacePoint::gen_parton_pt(
int count, JetParameters const & jet_param, double max_pt, double y,
HEJ::RNG & ran
) {
constexpr double p_small_pt = 0.02;
if(! jet_param.peak_pt) {
return gen_hard_pt(count, jet_param.min_pt, max_pt, y, ran);
}
const double r = ran.flat();
if(r > p_small_pt) {
weight_ /= 1. - p_small_pt;
return gen_hard_pt(count, *jet_param.peak_pt, max_pt, y, ran);
}
weight_ /= p_small_pt;
const double pt = gen_soft_pt(count, *jet_param.peak_pt, ran);
if(pt < jet_param.min_pt) {
weight_=0.0;
status_ = not_enough_jets;
return jet_param.min_pt;
}
return pt;
}
std::vector<fastjet::PseudoJet> PhaseSpacePoint::gen_LO_partons(
int np, bool is_pure_jets,
JetParameters const & jet_param,
double max_pt,
HEJ::RNG & ran
){
if (np<2) throw std::invalid_argument{"Not enough partons in gen_LO_partons"};
weight_ /= pow(16.*pow(M_PI,3),np);
weight_ /= std::tgamma(np+1); //remove rapidity ordering
std::vector<fastjet::PseudoJet> partons;
partons.reserve(np);
for(int i = 0; i < np; ++i){
const double y = -jet_param.max_y + 2*jet_param.max_y*ran.flat();
weight_ *= 2*jet_param.max_y;
const bool is_last_parton = i+1 == np;
if(is_pure_jets && is_last_parton) {
constexpr double parton_mass_sq = 0.;
partons.emplace_back(gen_last_momentum(partons, parton_mass_sq, y));
break;
}
const double phi = 2*M_PI*ran.flat();
weight_ *= 2.0*M_PI;
const double pt = gen_parton_pt(np, jet_param, max_pt, y, ran);
if(weight_ == 0.0) return {};
partons.emplace_back(fastjet::PtYPhiM(pt, y, phi));
assert(jet_param.min_pt <= partons[i].pt());
assert(partons[i].pt() <= max_pt+1e-5);
}
// Need to check that at LO, the number of jets = number of partons;
fastjet::ClusterSequence cs(partons, jet_param.def);
auto cluster_jets=cs.inclusive_jets(jet_param.min_pt);
if (cluster_jets.size()!=unsigned(np)){
weight_=0.0;
status_ = not_enough_jets;
return {};
}
std::sort(begin(partons), end(partons), rapidity_less{});
return partons;
}
Particle PhaseSpacePoint::gen_boson(
HEJ::ParticleID bosonid, double mass, double width,
HEJ::RNG & ran
){
// Usual phase space measure
weight_ /= 16.*pow(M_PI, 3);
// Generate a y Gaussian distributed around 0
/// @TODO check magic numbers for different boson Higgs
/// @TODO better sampling for W
const double stddev_y = 1.6;
const double y = random_normal(stddev_y, ran);
const double r1 = ran.flat();
const double s_boson = mass*(
mass + width*tan(M_PI/2.*r1 + (r1-1.)*atan(mass/width))
);
// off-shell s_boson sampling, compensates for Breit-Wigner
/// @TODO use a flag instead
if(abs(bosonid) == pid::Wp){
weight_/=M_PI*M_PI*8.;
weight_*= mass*width*( M_PI+2.*atan(mass/width) )
/ ( 1. + cos( M_PI*r1 + 2.*(r1-1.)*atan(mass/width) ) );
}
auto p = gen_last_momentum(outgoing_, s_boson, y);
return Particle{bosonid, std::move(p), {}};
}
Particle const & PhaseSpacePoint::most_backward_FKL(
std::vector<Particle> const & partons
) const{
if(!HEJ::is_parton(partons[0])) return partons[1];
return partons[0];
}
Particle const & PhaseSpacePoint::most_forward_FKL(
std::vector<Particle> const & partons
) const{
const size_t last_idx = partons.size() - 1;
if(!HEJ::is_parton(partons[last_idx])) return partons[last_idx-1];
return partons[last_idx];
}
Particle & PhaseSpacePoint::most_backward_FKL(
std::vector<Particle> & partons
) const{
if(!HEJ::is_parton(partons[0])) return partons[1];
return partons[0];
}
Particle & PhaseSpacePoint::most_forward_FKL(
std::vector<Particle> & partons
) const{
const size_t last_idx = partons.size() - 1;
if(!HEJ::is_parton(partons[last_idx])) return partons[last_idx-1];
return partons[last_idx];
}
namespace {
/// partons are ordered: even = anti, 0 = gluon
ParticleID index_to_pid(size_t i){
if(!i) return pid::gluon;
return static_cast<ParticleID>(i%2?(i+1)/2:-i/2);
}
/// partons are ordered: even = anti, 0 = gluon
size_t pid_to_index(ParticleID id){
if(id==pid::gluon) return 0;
return id>0?id*2-1:abs(id)*2;
}
std::bitset<11> init_allowed(ParticleID const id){
if(abs(id) == pid::proton)
return ~0;
std::bitset<11> out = 0;
if(is_parton(id))
out[pid_to_index(id)] = 1;
return out;
}
/// decides which "index" (see index_to_pid) are allowed for process
std::bitset<11> allowed_quarks(ParticleID const boson){
std::bitset<11> allowed = ~0;
if(abs(boson) == pid::Wp){
// special case W:
// Wp: anti-down or up-type quark, no b/t -> 0001100110(1) = 205
// Wm: down or anti-up-type quark, no b/t -> 0010011001(1) = 307
allowed = boson>0?205:307;
}
return allowed;
}
}
/**
* checks which partons are allowed as initial state:
* 1. only allow what is given in the Runcard (p -> all)
* 2. A/W/Z require something to couple to
* a) no qqx => no incoming gluon
* b) 2j => no incoming gluon
* c) 3j => can couple OR is gluon => 2 gluons become qqx later
*/
std::array<std::bitset<11>,2> PhaseSpacePoint::filter_partons(
Process const & proc, unsigned int const subl_channels, HEJ::RNG & ran
){
std::array<std::bitset<11>,2> allowed_partons{
init_allowed(proc.incoming[0]),
init_allowed(proc.incoming[1])
};
bool const allow_qqx = subl_channels&Subleading::qqx;
// special case A/W/Z
if(is_AWZ_proccess(proc) && ((proc.njets < 4) || !allow_qqx)){
// all possible incoming states
auto allowed(allowed_quarks(*proc.boson));
if(proc.njets == 2 || !allow_qqx) allowed[0]=0;
// possible states per leg
std::array<std::bitset<11>,2> const maybe_partons{
allowed_partons[0]&allowed, allowed_partons[1]&allowed};
if(maybe_partons[0].any() && maybe_partons[1].any()){
// two options to get allowed initial state => choose one at random
const size_t idx = ran.flat() < 0.5;
allowed_partons[idx] = maybe_partons[idx];
// else choose the possible
} else if(maybe_partons[0].any()) {
allowed_partons[0] = maybe_partons[0];
} else if(maybe_partons[1].any()) {
allowed_partons[1] = maybe_partons[1];
} else{
throw std::invalid_argument{"Incoming state not allowed."};
}
}
return allowed_partons;
}
void PhaseSpacePoint::reconstruct_incoming(
Process const & proc, unsigned int const subl_channels,
HEJ::PDF & pdf, double E_beam,
double uf,
HEJ::RNG & ran
){
std::tie(incoming_[0].p, incoming_[1].p) = incoming_momenta(outgoing_);
// calculate xa, xb
const double sqrts=2*E_beam;
const double xa=(incoming_[0].p.e()-incoming_[0].p.pz())/sqrts;
const double xb=(incoming_[1].p.e()+incoming_[1].p.pz())/sqrts;
// abort if phase space point is outside of collider energy reach
if (xa>1. || xb>1.){
weight_=0;
status_ = too_much_energy;
return;
}
auto const & ids = proc.incoming;
std::array<std::bitset<11>,2> allowed_partons(
filter_partons(proc, subl_channels, ran));
for(size_t i = 0; i < 2; ++i){
if(ids[i] == pid::proton || ids[i] == pid::p_bar){
// pick ids according to pdfs
incoming_[i].type =
generate_incoming_id(i, i?xb:xa, uf, pdf, allowed_partons[i], ran);
} else {
assert(allowed_partons[i][pid_to_index(ids[i])]);
incoming_[i].type = ids[i];
}
}
assert(momentum_conserved(1e-7));
}
HEJ::ParticleID PhaseSpacePoint::generate_incoming_id(
size_t const beam_idx, double const x, double const uf,
HEJ::PDF & pdf, std::bitset<11> allowed_partons, HEJ::RNG & ran
){
std::array<double,11> pdf_wt;
pdf_wt[0] = allowed_partons[0]?fabs(pdf.pdfpt(beam_idx,x,uf,pid::gluon)):0.;
double pdftot = pdf_wt[0];
for(size_t i = 1; i < pdf_wt.size(); ++i){
pdf_wt[i] = allowed_partons[i]?4./9.*fabs(pdf.pdfpt(beam_idx,x,uf,index_to_pid(i))):0;
pdftot += pdf_wt[i];
}
const double r1 = pdftot * ran.flat();
double sum = 0;
for(size_t i=0; i < pdf_wt.size(); ++i){
if (r1 < (sum+=pdf_wt[i])){
weight_*= pdftot/pdf_wt[i];
return index_to_pid(i);
}
}
std::cerr << "Error in choosing incoming parton: "<<x<<" "<<uf<<" "
<<sum<<" "<<pdftot<<" "<<r1<<std::endl;
throw std::logic_error{"Failed to choose parton flavour"};
}
void PhaseSpacePoint::couple_boson(
HEJ::ParticleID const boson, HEJ::RNG & ran
){
if(abs(boson) != pid::Wp) return; // only matters for W
/// @TODO this could be use to sanity check gamma and Z
// find all possible quarks
std::vector<Particle*> allowed_parts;
for(auto & part: outgoing_){
// Wp -> up OR anti-down, Wm -> anti-up OR down, no bottom
if ( can_couple_to_W(part, boson) )
allowed_parts.push_back(&part);
}
if(allowed_parts.size() == 0){
throw std::logic_error{"Found no parton for coupling with boson"};
}
// select one and flip it
size_t idx = 0;
if(allowed_parts.size() > 1){
/// @TODO more efficient sampling
/// old code: probability[i] = exp(parton[i].y - W.y)
idx = floor(ran.flat()*allowed_parts.size());
weight_ *= allowed_parts.size();
}
const int W_charge = boson>0?1:-1;
allowed_parts[idx]->type =
static_cast<ParticleID>( allowed_parts[idx]->type - W_charge );
}
double PhaseSpacePoint::random_normal(
double stddev,
HEJ::RNG & ran
){
const double r1 = ran.flat();
const double r2 = ran.flat();
const double lninvr1 = -log(r1);
const double result = stddev*sqrt(2.*lninvr1)*cos(2.*M_PI*r2);
weight_ *= exp(result*result/(2*stddev*stddev))*sqrt(2.*M_PI)*stddev;
return result;
}
bool PhaseSpacePoint::momentum_conserved(double ep) const{
fastjet::PseudoJet diff;
for(auto const & in: incoming()) diff += in.p;
for(auto const & out: outgoing()) diff -= out.p;
return nearby_ep(diff, fastjet::PseudoJet{}, ep);
}
Decay PhaseSpacePoint::select_decay_channel(
std::vector<Decay> const & decays,
HEJ::RNG & ran
){
double br_total = 0.;
for(auto const & decay: decays) br_total += decay.branching_ratio;
// adjust weight
// this is given by (channel branching ratio)/(chance to pick channel)
// where (chance to pick channel) =
// (channel branching ratio)/(total branching ratio)
weight_ *= br_total;
if(decays.size()==1) return decays.front();
const double r1 = br_total*ran.flat();
double br_sum = 0.;
for(auto const & decay: decays){
br_sum += decay.branching_ratio;
if(r1 < br_sum) return decay;
}
throw std::logic_error{"unreachable"};
}
std::vector<Particle> PhaseSpacePoint::decay_boson(
HEJ::Particle const & parent,
std::vector<Decay> const & decays,
HEJ::RNG & ran
){
const auto channel = select_decay_channel(decays, ran);
return decay_boson(parent, channel.products, ran);
}
std::vector<Particle> PhaseSpacePoint::decay_boson(
HEJ::Particle const & parent,
std::vector<HEJ::ParticleID> const & decays,
HEJ::RNG & ran
){
if(decays.size() != 2){
throw HEJ::not_implemented{
"only decays into two particles are implemented"
};
}
std::vector<Particle> decay_products(decays.size());
for(size_t i = 0; i < decays.size(); ++i){
decay_products[i].type = decays[i];
}
// choose polar and azimuth angle in parent rest frame
const double E = parent.m()/2;
const double theta = 2.*M_PI*ran.flat();
const double cos_phi = 2.*ran.flat()-1.;
const double sin_phi = sqrt(1. - cos_phi*cos_phi); // Know 0 < phi < pi
const double px = E*cos(theta)*sin_phi;
const double py = E*sin(theta)*sin_phi;
const double pz = E*cos_phi;
decay_products[0].p.reset(px, py, pz, E);
decay_products[1].p.reset(-px, -py, -pz, E);
for(auto & particle: decay_products) particle.p.boost(parent.p);
return decay_products;
}
}
diff --git a/FixedOrderGen/src/config.cc b/FixedOrderGen/src/config.cc
index aa91355..447f6ab 100644
--- a/FixedOrderGen/src/config.cc
+++ b/FixedOrderGen/src/config.cc
@@ -1,413 +1,413 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#include "config.hh"
#include <cctype>
#include "Subleading.hh"
#include "HEJ/config.hh"
#include "HEJ/YAMLreader.hh"
namespace HEJFOG{
using HEJ::set_from_yaml;
using HEJ::set_from_yaml_if_defined;
using HEJ::pid::ParticleID;
namespace{
//! Get YAML tree of supported options
/**
* The configuration file is checked against this tree of options
* in assert_all_options_known.
*/
YAML::Node const & get_supported_options(){
const static YAML::Node supported = [](){
YAML::Node supported;
static const auto opts = {
"process", "events", "subleading fraction","subleading channels",
"scales", "scale factors", "max scale ratio", "pdf", "vev",
"event output", "analysis", "import scales"
};
// add subnodes to "supported" - the assigned value is irrelevant
for(auto && opt: opts) supported[opt] = "";
for(auto && jet_opt: {"min pt", "peak pt", "algorithm", "R", "max rapidity"}){
supported["jets"][jet_opt] = "";
}
for(auto && particle_type: {"Higgs", "W", "Z"}){
for(auto && particle_opt: {"mass", "width"}){
supported["particle properties"][particle_type][particle_opt] = "";
}
}
for(auto && particle_type: {"Higgs", "Wp", "W+", "Wm", "W-", "Z"}){
for(auto && particle_opt: {"into", "branching ratio"}){
supported["decays"][particle_type][particle_opt] = "";
}
}
for(auto && opt: {"mt", "use impact factors", "include bottom", "mb"}){
supported["Higgs coupling"][opt] = "";
}
for(auto && beam_opt: {"energy", "particles"}){
supported["beam"][beam_opt] = "";
}
for(auto && unweight_opt: {"sample size", "max deviation"}){
supported["unweight"][unweight_opt] = "";
}
for(auto && opt: {"name", "seed"}){
supported["random generator"][opt] = "";
}
return supported;
}();
return supported;
}
JetParameters get_jet_parameters(
YAML::Node const & node, std::string const & entry
){
const auto p = HEJ::get_jet_parameters(node, entry);
JetParameters result;
result.def = p.def;
result.min_pt = p.min_pt;
set_from_yaml(result.max_y, node, entry, "max rapidity");
set_from_yaml_if_defined(result.peak_pt, node, entry, "peak pt");
if(result.peak_pt && *result.peak_pt <= result.min_pt)
throw std::invalid_argument{
"Value of option 'peak pt' has to be larger than 'min pt'."
};
return result;
}
Beam get_Beam(
YAML::Node const & node, std::string const & entry
){
Beam beam;
std::vector<HEJ::ParticleID> particles;
set_from_yaml(beam.energy, node, entry, "energy");
set_from_yaml_if_defined(particles, node, entry, "particles");
if(! particles.empty()){
for(HEJ::ParticleID particle: particles){
if(particle != HEJ::pid::p && particle != HEJ::pid::p_bar){
throw std::invalid_argument{
"Unsupported value in option " + entry + ": particles:"
" only proton ('p') and antiproton ('p_bar') beams are supported"
};
}
}
if(particles.size() != 2){
throw std::invalid_argument{"Not exactly two beam particles"};
}
beam.particles.front() = particles.front();
beam.particles.back() = particles.back();
}
return beam;
}
std::vector<std::string> split(
std::string const & str, std::string const & delims
){
std::vector<std::string> result;
for(size_t begin, end = 0; end != str.npos;){
begin = str.find_first_not_of(delims, end);
if(begin == str.npos) break;
end = str.find_first_of(delims, begin + 1);
result.emplace_back(str.substr(begin, end - begin));
}
return result;
}
std::invalid_argument invalid_incoming(std::string const & what){
return std::invalid_argument{
"Incoming particle type " + what + " not supported,"
" incoming particles have to be 'p', 'p_bar' or partons"
};
}
std::invalid_argument invalid_outgoing(std::string const & what){
return std::invalid_argument{
"Outgoing particle type " + what + " not supported,"
" outgoing particles have to be 'j', 'photon', 'H', 'Wm', 'Wp', 'e-', 'e+', 'nu_e', 'nu_e_bar'"
};
}
HEJ::ParticleID reconstruct_boson_id(
std::vector<HEJ::ParticleID> const & ids
){
assert(ids.size()==2);
const int pidsum = ids[0] + ids[1];
if(pidsum == +1) {
assert(HEJ::is_antilepton(ids[0]));
if(HEJ::is_antineutrino(ids[0])) {
throw HEJ::not_implemented{"lepton-flavour violating final state"};
}
assert(HEJ::is_neutrino(ids[1]));
// charged antilepton + neutrino means we had a W+
return HEJ::pid::Wp;
}
if(pidsum == -1) {
assert(HEJ::is_antilepton(ids[0]));
if(HEJ::is_neutrino(ids[1])) {
throw HEJ::not_implemented{"lepton-flavour violating final state"};
}
assert(HEJ::is_antineutrino(ids[0]));
// charged lepton + antineutrino means we had a W-
return HEJ::pid::Wm;
}
throw HEJ::not_implemented{
"final state with leptons "+HEJ::name(ids[0])+" and "+HEJ::name(ids[1])
+" not supported"
};
}
Process get_process(
YAML::Node const & node, std::string const & entry
){
Process result;
std::string process_string;
set_from_yaml(process_string, node, entry);
assert(! process_string.empty());
const auto particles = split(process_string, " \n\t\v=>");
if(particles.size() < 3){
throw std::invalid_argument{
"Bad format in option process: '" + process_string
+ "', expected format is 'in1 in2 => out1 ...'"
};
}
result.incoming.front() = HEJ::to_ParticleID(particles[0]);
result.incoming.back() = HEJ::to_ParticleID(particles[1]);
for(size_t i = 0; i < result.incoming.size(); ++i){
const HEJ::ParticleID in = result.incoming[i];
if(
in != HEJ::pid::proton && in != HEJ::pid::p_bar
&& !HEJ::is_parton(in)
){
throw invalid_incoming(particles[i]);
}
}
result.njets = 0;
for(size_t i = result.incoming.size(); i < particles.size(); ++i){
assert(! particles[i].empty());
if(particles[i] == "j") ++result.njets;
else if(std::isdigit(particles[i].front())
&& particles[i].back() == 'j')
result.njets += std::stoi(particles[i]);
else{
const auto pid = HEJ::to_ParticleID(particles[i]);
if(pid==HEJ::pid::Higgs || pid==HEJ::pid::Wp || pid==HEJ::pid::Wm){
if(result.boson)
throw std::invalid_argument{
"More than one outgoing boson is not supported"
};
if(!result.boson_decay.empty())
throw std::invalid_argument{
"Production of a boson together with a lepton is not supported"
};
result.boson = pid;
} else if (HEJ::is_anylepton(pid)){
// Do not accept more leptons, if two leptons are already mentioned
if( result.boson_decay.size()>=2 )
throw std::invalid_argument{"Too many leptons provided"};
if(result.boson)
throw std::invalid_argument{
"Production of a lepton together with a boson is not supported"
};
result.boson_decay.emplace_back(pid);
} else {
throw invalid_outgoing(particles[i]);
}
}
}
if(result.njets < 2){
throw std::invalid_argument{
"Process has to include at least two jets ('j')"
};
}
if(!result.boson_decay.empty()){
std::sort(begin(result.boson_decay),end(result.boson_decay));
assert(!result.boson);
result.boson = reconstruct_boson_id(result.boson_decay);
}
return result;
}
HEJFOG::Subleading to_subleading_channel(YAML::Node const & yaml){
std::string name;
using namespace HEJFOG::channels;
set_from_yaml(name, yaml);
if(name == "none")
return none;
if(name == "all")
return all;
if(name == "unordered" || name == "uno")
return uno;
if(name == "qqx")
return qqx;
throw HEJ::unknown_option("Unknown subleading channel '"+name+"'");
}
unsigned int get_subleading_channels(YAML::Node const & node){
using YAML::NodeType;
using namespace HEJFOG::channels;
// all channels allowed by default
if(!node) return all;
switch(node.Type()){
case NodeType::Undefined:
return all;
case NodeType::Null:
return none;
case NodeType::Scalar:
return to_subleading_channel(node);
case NodeType::Map:
throw HEJ::invalid_type{"map is not a valid option for subleading channels"};
case NodeType::Sequence:
unsigned int channels = HEJFOG::Subleading::none;
for(auto && channel_node: node){
channels |= get_subleading_channels(channel_node);
}
return channels;
}
throw std::logic_error{"unreachable"};
}
Decay get_decay(YAML::Node const & node){
Decay decay;
set_from_yaml(decay.products, node, "into");
decay.branching_ratio=1;
set_from_yaml_if_defined(decay.branching_ratio, node, "branching ratio");
return decay;
}
std::vector<Decay> get_decays(YAML::Node const & node){
using YAML::NodeType;
if(!node) return {};
switch(node.Type()){
case NodeType::Null:
case NodeType::Undefined:
return {};
case NodeType::Scalar:
throw HEJ::invalid_type{"value is not a list of decays"};
case NodeType::Map:
return {get_decay(node)};
case NodeType::Sequence:
std::vector<Decay> result;
for(auto && decay_str: node){
result.emplace_back(get_decay(decay_str));
}
return result;
}
throw std::logic_error{"unreachable"};
}
ParticlesDecayMap get_all_decays(YAML::Node const & node,
std::string const & entry
){
if(!node[entry]) return {};
if(!node[entry].IsMap())
throw HEJ::invalid_type{entry + " have to be a map"};
ParticlesDecayMap result;
for(auto const & sub_node: node[entry]) {
const auto name = sub_node.first.as<std::string>();
const auto id = HEJ::to_ParticleID(name);
result.emplace(id, get_decays(sub_node.second));
}
return result;
}
HEJ::ParticleProperties get_particle_properties(
YAML::Node const & node, std::string const & entry,
std::string const & boson
){
HEJ::ParticleProperties result;
set_from_yaml(result.mass, node, entry, boson, "mass");
set_from_yaml(result.width, node, entry, boson, "width");
return result;
}
HEJ::EWConstants get_ew_parameters(YAML::Node const & node){
HEJ::EWConstants result;
double vev;
set_from_yaml(vev, node, "vev");
result.set_vevWZH(vev,
get_particle_properties(node, "particle properties", "W"),
get_particle_properties(node, "particle properties", "Z"),
get_particle_properties(node, "particle properties", "Higgs")
);
return result;
}
UnweightSettings get_unweight(
YAML::Node const & node, std::string const & entry
){
UnweightSettings result;
set_from_yaml(result.sample_size, node, entry, "sample size");
if(result.sample_size <= 0){
throw std::invalid_argument{
"negative sample size " + std::to_string(result.sample_size)
};
}
set_from_yaml(result.max_dev, node, entry, "max deviation");
return result;
}
Config to_Config(YAML::Node const & yaml){
try{
HEJ::assert_all_options_known(yaml, get_supported_options());
}
catch(HEJ::unknown_option const & ex){
throw HEJ::unknown_option{std::string{"Unknown option '"} + ex.what() + "'"};
}
Config config;
config.process = get_process(yaml, "process");
set_from_yaml(config.events, yaml, "events");
config.jets = get_jet_parameters(yaml, "jets");
config.beam = get_Beam(yaml, "beam");
for(size_t i = 0; i < config.process.incoming.size(); ++i){
const auto & in = config.process.incoming[i];
using namespace HEJ::pid;
if( (in == p || in == p_bar) && in != config.beam.particles[i]){
throw std::invalid_argument{
"Particle type of beam " + std::to_string(i+1) + " incompatible"
+ " with type of incoming particle " + std::to_string(i+1)
};
}
}
set_from_yaml(config.pdf_id, yaml, "pdf");
set_from_yaml(config.subleading_fraction, yaml, "subleading fraction");
if(config.subleading_fraction < 0 || config.subleading_fraction > 1){
throw std::invalid_argument{
"subleading fraction has to be between 0 and 1"
};
}
if(config.subleading_fraction == 0)
config.subleading_channels = Subleading::none;
else
config.subleading_channels = get_subleading_channels(yaml["subleading channels"]);
config.ew_parameters = get_ew_parameters(yaml);
- config.particles_decays = get_all_decays(yaml, "decays");
+ config.particle_decays = get_all_decays(yaml, "decays");
set_from_yaml_if_defined(config.analysis_parameters, yaml, "analysis");
config.scales = HEJ::to_ScaleConfig(yaml);
set_from_yaml_if_defined(config.output, yaml, "event output");
config.rng = HEJ::to_RNGConfig(yaml, "random generator");
config.Higgs_coupling = HEJ::get_Higgs_coupling(yaml, "Higgs coupling");
if(yaml["unweight"]) config.unweight = get_unweight(yaml, "unweight");
return config;
}
} // namespace anonymous
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;
}
}
}
diff --git a/FixedOrderGen/src/main.cc b/FixedOrderGen/src/main.cc
index f1fdbe9..d0b83a3 100644
--- a/FixedOrderGen/src/main.cc
+++ b/FixedOrderGen/src/main.cc
@@ -1,234 +1,234 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#include <algorithm>
#include <chrono>
#include <fstream>
#include <iostream>
#include <map>
#include <memory>
#include "yaml-cpp/yaml.h"
#include "LHEF/LHEF.h"
#include "HEJ/CombinedEventWriter.hh"
#include "HEJ/CrossSectionAccumulator.hh"
#include "HEJ/get_analysis.hh"
#include "HEJ/LesHouchesWriter.hh"
#include "HEJ/make_RNG.hh"
#include "HEJ/ProgressBar.hh"
#include "HEJ/stream.hh"
#include "config.hh"
#include "EventGenerator.hh"
#include "PhaseSpacePoint.hh"
#include "Unweighter.hh"
#include "Version.hh"
namespace{
constexpr auto banner =
" __ ___ __ ______ __ "
" __ \n / / / (_)___ _/ /_ / ____/___ "
" ___ _________ ___ __ / /__ / /______ \n "
" / /_/ / / __ `/ __ \\ / __/ / __ \\/ _ \\/ ___/ __ `/ / / / __ / / _"
" \\/ __/ ___/ \n / __ / / /_/ / / / / / /___/ /"
" / / __/ / / /_/ / /_/ / / /_/ / __/ /_(__ ) "
" \n /_/ /_/_/\\__, /_/ /_/ /_____/_/ /_/\\___/_/ \\__, /\\__, / \\___"
"_/\\___/\\__/____/ \n ____///__/ "
"__ ____ ///__//____/ ______ __ "
" \n / ____(_) _____ ____/ / / __ \\_________/ /__ _____ / "
"____/__ ____ ___ _________ _/ /_____ _____\n / /_ / / |/_/ _ \\/ __"
" / / / / / ___/ __ / _ \\/ ___/ / / __/ _ \\/ __ \\/ _ \\/ ___/ __ `/ "
"__/ __ \\/ ___/\n / __/ / /> </ __/ /_/ / / /_/ / / / /_/ / __/ / "
" / /_/ / __/ / / / __/ / / /_/ / /_/ /_/ / / \n /_/ /_/_/|_|\\___"
"/\\__,_/ \\____/_/ \\__,_/\\___/_/ \\____/\\___/_/ /_/\\___/_/ "
"\\__,_/\\__/\\____/_/ \n";
constexpr double invGeV2_to_pb = 389379292.;
constexpr long long max_warmup_events = 10000;
}
HEJFOG::Config load_config(char const * filename){
try{
return HEJFOG::load_config(filename);
}
catch(std::exception const & exc){
std::cerr << "Error: " << exc.what() << '\n';
std::exit(EXIT_FAILURE);
}
}
std::unique_ptr<HEJ::Analysis> get_analysis(
YAML::Node const & parameters
){
try{
return HEJ::get_analysis(parameters);
}
catch(std::exception const & exc){
std::cerr << "Failed to load analysis: " << exc.what() << '\n';
std::exit(EXIT_FAILURE);
}
}
int main(int argn, char** argv) {
using namespace std::string_literals;
if (argn < 2) {
std::cerr << "\n# Usage:\n." << argv[0] << " config_file\n";
return EXIT_FAILURE;
}
std::cout << banner;
std::cout << "Version " << HEJFOG::Version::String()
<< ", revision " << HEJFOG::Version::revision() << std::endl;
fastjet::ClusterSequence::print_banner();
using clock = std::chrono::system_clock;
const auto start_time = clock::now();
// read configuration
auto config = load_config(argv[1]);
std::unique_ptr<HEJ::Analysis> analysis = get_analysis(
config.analysis_parameters
);
assert(analysis != nullptr);
auto ran = HEJ::make_RNG(config.rng.name, config.rng.seed);
assert(ran != nullptr);
HEJ::ScaleGenerator scale_gen{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
std::move(scale_gen),
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
*ran
};
LHEF::HEPRUP heprup;
heprup.IDBMUP=std::pair<long,long>(config.beam.particles[0], config.beam.particles[1]);
heprup.EBMUP=std::make_pair(config.beam.energy, config.beam.energy);
heprup.PDFGUP=std::make_pair(0,0);
heprup.PDFSUP=std::make_pair(config.pdf_id,config.pdf_id);
heprup.NPRUP=1;
heprup.XSECUP=std::vector<double>(1.);
heprup.XERRUP=std::vector<double>(1.);
heprup.LPRUP=std::vector<int>{1};
heprup.generators.emplace_back(LHEF::XMLTag{});
heprup.generators.back().name = HEJFOG::Version::package_name();
heprup.generators.back().version = HEJFOG::Version::String();
HEJ::CombinedEventWriter writer{config.output, heprup};
HEJ::optional<HEJFOG::Unweighter> unweighter{};
std::map<HEJFOG::Status, int> status_counter;
std::vector<HEJ::Event> events;
int trials = 0;
// warm-up phase to train unweighter
if(config.unweight) {
std::cout << "Calibrating unweighting ...\n";
const auto warmup_start = clock::now();
const size_t warmup_events = config.unweight->sample_size;
HEJ::ProgressBar<size_t> warmup_progress{std::cout, warmup_events};
for(; events.size() < warmup_events; ++trials){
auto ev = generator.gen_event();
++status_counter[generator.status()];
assert( (generator.status() == HEJFOG::good) == bool(ev) );
if(generator.status() == HEJFOG::good && analysis->pass_cuts(*ev, *ev)) {
events.emplace_back(std::move(*ev));
++warmup_progress;
}
}
std::cout << std::endl;
unweighter = HEJFOG::Unweighter{
begin(events), end(events), config.unweight->max_dev, *ran,
config.jets.peak_pt?(*config.jets.peak_pt):0.
};
std::vector<HEJ::Event> unweighted_events;
for(auto && ev: events) {
auto unweighted = unweighter->unweight(std::move(ev));
if(unweighted) {
unweighted_events.emplace_back(std::move(*unweighted));
}
}
events = std::move(unweighted_events);
if(events.empty()) {
std::cerr <<
"Failed to generate events. Please increase \"unweight: sample size\""
" or reduce \"unweight: max deviation\"\n";
return EXIT_FAILURE;
}
const auto warmup_end = clock::now();
const double completion = static_cast<double>(events.size())/config.events;
const std::chrono::duration<double> remaining_time =
(warmup_end- warmup_start)*(1./completion - 1);
const auto finish = clock::to_time_t(
std::chrono::time_point_cast<std::chrono::seconds>(warmup_end + remaining_time)
);
std::cout
<< "Generated " << events.size() << "/" << config.events << " events ("
<< static_cast<int>(std::round(100*completion)) << "%)\n"
<< "Estimated remaining generation time: "
<< remaining_time.count() << " seconds ("
<< std::put_time(std::localtime(&finish), "%c") << ")\n\n";
}
HEJ::ProgressBar<long long> progress{std::cout, config.events};
progress.increment(events.size());
events.reserve(config.events);
for(; events.size() < static_cast<size_t>(config.events); ++trials){
auto ev = generator.gen_event();
++status_counter[generator.status()];
assert( (generator.status() == HEJFOG::good) == bool(ev) );
if(generator.status() == HEJFOG::good && analysis->pass_cuts(*ev, *ev)) {
if(unweighter) {
auto unweighted = unweighter->unweight(std::move(*ev));
if(! unweighted) continue;
ev = std::move(unweighted);
}
events.emplace_back(std::move(*ev));
++progress;
}
}
std::cout << std::endl;
HEJ::CrossSectionAccumulator xs;
for(auto & ev: events){
ev.parameters() *= invGeV2_to_pb/trials;
analysis->fill(ev, ev);
writer.write(ev);
xs.fill(ev);
}
analysis->finalise();
const std::chrono::duration<double> run_time = (clock::now() - start_time);
std::cout << "\nTask Runtime: " << run_time.count() << " seconds.\n\n";
std::cout << xs << '\n';
for(auto && entry: status_counter){
const double fraction = static_cast<double>(entry.second)/trials;
const int percent = std::round(100*fraction);
std::cout << "status "
<< std::left << std::setw(16) << (to_string(entry.first) + ":")
<< " [";
for(int i = 0; i < percent/2; ++i) std::cout << '#';
for(int i = percent/2; i < 50; ++i) std::cout << ' ';
std::cout << "] " << percent << "%\n";
}
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/2j.cc b/FixedOrderGen/t/2j.cc
index 99419ba..7d0ebd6 100644
--- a/FixedOrderGen/t/2j.cc
+++ b/FixedOrderGen/t/2j.cc
@@ -1,67 +1,67 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cmath>
#include <cassert>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Mixmax.hh"
#include "HEJ/Event.hh"
#include "HEJ/PDF.hh"
#include "HEJ/MatrixElement.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 86.42031848*1e6; //calculated with "combined" HEJ svn r3480
auto config = load_config("config_2j.yml");
HEJ::Mixmax ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.01*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/4j.cc b/FixedOrderGen/t/4j.cc
index 8d9aa41..b9fdef1 100644
--- a/FixedOrderGen/t/4j.cc
+++ b/FixedOrderGen/t/4j.cc
@@ -1,68 +1,68 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cmath>
#include <cassert>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Mixmax.hh"
#include "HEJ/Event.hh"
#include "HEJ/PDF.hh"
#include "HEJ/MatrixElement.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 0.81063619*1e6; //calculated with "combined" HEJ svn r3480
auto config = load_config("config_2j.yml");
config.process.njets = 4;
HEJ::Mixmax ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.03*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/W_reconstruct_enu.cc b/FixedOrderGen/t/W_reconstruct_enu.cc
index 8af3615..badb36a 100644
--- a/FixedOrderGen/t/W_reconstruct_enu.cc
+++ b/FixedOrderGen/t/W_reconstruct_enu.cc
@@ -1,72 +1,72 @@
/**
* \brief that the reconstruction of the W works
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Event.hh"
#include "HEJ/Mixmax.hh"
using namespace HEJFOG;
using namespace HEJ;
namespace {
constexpr size_t num_events = 1000;
constexpr double invGeV2_to_pb = 389379292.;
}
double get_xs(std::string config_name){
auto config { load_config(config_name) };
config.events = num_events;
HEJ::Mixmax ran{1};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
}
return xs;
}
int main(){
double xs_W{ get_xs("config_Wp_2j.yml")};
double xs_enu{ get_xs("config_Wp_2j_decay.yml")};
if(std::abs(xs_W/xs_enu-1.)>1e-6){
std::cerr << "Reconstructing the W in the runcard gave a different results ("
<< xs_W << " vs. "<< xs_enu << " -> " << std::abs(xs_W/xs_enu-1.)*100 << "%)\n";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_2j.cc b/FixedOrderGen/t/h_2j.cc
index 18c11d0..e993a8d 100644
--- a/FixedOrderGen/t/h_2j.cc
+++ b/FixedOrderGen/t/h_2j.cc
@@ -1,75 +1,75 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cmath>
#include <cassert>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Mixmax.hh"
#include "HEJ/Event.hh"
#include "HEJ/PDF.hh"
#include "HEJ/MatrixElement.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 2.04928; // +- 0.00377252
//calculated with HEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20
auto config = load_config("config_h_2j.yml");
HEJ::Mixmax ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
const auto the_Higgs = std::find_if(
begin(ev->outgoing()), end(ev->outgoing()),
[](HEJ::Particle const & p){ return p.type == HEJ::ParticleID::h; }
);
assert(the_Higgs != end(ev->outgoing()));
if(std::abs(the_Higgs->rapidity()) > 5.) continue;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << std::endl;
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.01*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_2j_decay.cc b/FixedOrderGen/t/h_2j_decay.cc
index 8774f18..0d25f19 100644
--- a/FixedOrderGen/t/h_2j_decay.cc
+++ b/FixedOrderGen/t/h_2j_decay.cc
@@ -1,94 +1,94 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cmath>
#include <cassert>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Event.hh"
#include "HEJ/MatrixElement.hh"
#include "HEJ/Particle.hh"
#include "HEJ/PDF.hh"
#include "HEJ/Ranlux64.hh"
#include "HEJ/utility.hh"
using namespace HEJFOG;
bool pass_dR_cut(
std::vector<fastjet::PseudoJet> const & jets,
std::vector<HEJ::Particle> const & photons
){
constexpr double delta_R_min = 0.7;
for(auto const & jet: jets){
for(auto const & photon: photons){
if(jet.delta_R(photon.p) < delta_R_min) return false;
}
}
return true;
}
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 0.00429198; // +- 1.0488e-05
//calculated with HEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20
auto config = load_config("config_h_2j_decay.yml");
HEJ::Ranlux64 ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
assert(ev->decays().size() == 1);
const auto decay = begin(ev->decays());
assert(ev->outgoing().size() > decay->first);
const auto & the_Higgs = ev->outgoing()[decay->first];
assert(the_Higgs.type == HEJ::pid::Higgs);
assert(decay->second.size() == 2);
auto const & gamma = decay->second;
assert(gamma[0].type == HEJ::pid::photon);
assert(gamma[1].type == HEJ::pid::photon);
assert(HEJ::nearby_ep(gamma[0].p + gamma[1].p, the_Higgs.p, 1e-6));
if(!pass_dR_cut(ev->jets(), gamma)) continue;
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << std::endl;
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.012*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_3j.cc b/FixedOrderGen/t/h_3j.cc
index c4a9e8a..8d134ca 100644
--- a/FixedOrderGen/t/h_3j.cc
+++ b/FixedOrderGen/t/h_3j.cc
@@ -1,76 +1,76 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cmath>
#include <cassert>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Ranlux64.hh"
#include "HEJ/Event.hh"
#include "HEJ/MatrixElement.hh"
#include "HEJ/PDF.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 1.07807; // +- 0.0071
//calculated with HEJ revision 93efdc851b02a907a6fcc63956387f9f4c1111c2 +1
auto config = load_config("config_h_2j.yml");
config.process.njets = 3;
HEJ::Ranlux64 ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
const auto the_Higgs = std::find_if(
begin(ev->outgoing()), end(ev->outgoing()),
[](HEJ::Particle const & p){ return p.type == HEJ::ParticleID::h; }
);
assert(the_Higgs != end(ev->outgoing()));
if(std::abs(the_Higgs->rapidity()) > 5.) continue;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << std::endl;
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.02*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_3j_uno1.cc b/FixedOrderGen/t/h_3j_uno1.cc
index 0befb62..94bc80e 100644
--- a/FixedOrderGen/t/h_3j_uno1.cc
+++ b/FixedOrderGen/t/h_3j_uno1.cc
@@ -1,80 +1,80 @@
/**
* check that adding uno emissions doesn't change the FKL cross section
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cassert>
#include <cmath>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Ranlux64.hh"
#include "Subleading.hh"
#include "HEJ/Event.hh"
#include "HEJ/MatrixElement.hh"
#include "HEJ/PDF.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 0.0243548; // +- 0.000119862
//calculated with HEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20
auto config = load_config("config_h_2j.yml");
config.process.njets = 3;
config.process.incoming = {HEJ::pid::u, HEJ::pid::u};
config.subleading_channels = HEJFOG::Subleading::uno;
HEJ::Ranlux64 ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
int uno_found = 0;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
if(ev->type() != HEJ::event_type::FKL){
++uno_found;
continue;
}
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';
std::cout << uno_found << " events with unordered emission" << std::endl;
assert(uno_found > 0);
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.05*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_3j_uno2.cc b/FixedOrderGen/t/h_3j_uno2.cc
index 3cb4ae7..ab069d9 100644
--- a/FixedOrderGen/t/h_3j_uno2.cc
+++ b/FixedOrderGen/t/h_3j_uno2.cc
@@ -1,75 +1,75 @@
/**
* check uno cross section
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cassert>
#include <cmath>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Ranlux64.hh"
#include "Subleading.hh"
#include "HEJ/Event.hh"
#include "HEJ/MatrixElement.hh"
#include "HEJ/PDF.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 0.00347538; // +- 3.85875e-05
//calculated with HEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20
auto config = load_config("config_h_2j.yml");
config.process.njets = 3;
config.process.incoming = {HEJ::pid::u, HEJ::pid::u};
config.subleading_fraction = 1.;
config.subleading_channels = HEJFOG::Subleading::uno;
HEJ::Ranlux64 ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
if(ev->type() == HEJ::event_type::FKL) continue;
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << std::endl;
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.05*xs);
return EXIT_SUCCESS;
}
diff --git a/FixedOrderGen/t/h_5j.cc b/FixedOrderGen/t/h_5j.cc
index d6d3ffa..cbcd7a2 100644
--- a/FixedOrderGen/t/h_5j.cc
+++ b/FixedOrderGen/t/h_5j.cc
@@ -1,72 +1,72 @@
/**
* This is a regression test
* the reference cross section has not been checked against any other program
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <cassert>
#include <cmath>
#include <iostream>
#include "config.hh"
#include "EventGenerator.hh"
#include "HEJ/Ranlux64.hh"
#include "HEJ/Event.hh"
#include "HEJ/MatrixElement.hh"
#include "HEJ/PDF.hh"
using namespace HEJFOG;
int main(){
constexpr double invGeV2_to_pb = 389379292.;
constexpr double xs_ref = 0.252273; // +- 0.00657742
//calculated with HEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20
auto config = load_config("config_h_2j.yml");
config.process.njets = 5;
HEJ::Ranlux64 ran{};
HEJFOG::EventGenerator generator{
config.process,
config.beam,
HEJ::ScaleGenerator{
config.scales.base,
config.scales.factors,
config.scales.max_ratio
},
config.jets,
config.pdf_id,
config.subleading_fraction,
config.subleading_channels,
- config.particles_decays,
+ config.particle_decays,
config.Higgs_coupling,
config.ew_parameters,
ran
};
double xs = 0., xs_err = 0.;
for (int trials = 0; trials < config.events; ++trials){
auto ev = generator.gen_event();
if(generator.status() != good) continue;
assert(ev);
ev->central().weight *= invGeV2_to_pb;
ev->central().weight /= config.events;
xs += ev->central().weight;
xs_err += ev->central().weight*ev->central().weight;
}
xs_err = std::sqrt(xs_err);
std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << std::endl;
assert(std::abs(xs - xs_ref) < 3*xs_err);
assert(xs_err < 0.06*xs);
return EXIT_SUCCESS;
}