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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/Thrust.hh"
#define I_KNOW_THE_INITIAL_QUARKS_PROJECTION_IS_DODGY_BUT_NEED_TO_USE_IT
#include "Rivet/Projections/InitialQuarks.hh"
namespace Rivet {
/// @brief SLD flavour-dependent fragmentation paper
///
/// @author Peter Richardson
class SLD_2004_S5693039 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(SLD_2004_S5693039);
/// @name Analysis methods
//@{
void analyze(const Event& e) {
// First, veto on leptonic events by requiring at least 2 charged FS particles
const FinalState& fs = apply<FinalState>(e, "FS");
const size_t numParticles = fs.particles().size();
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
if (numParticles < 2) {
MSG_DEBUG("Failed ncharged cut");
vetoEvent;
}
MSG_DEBUG("Passed ncharged cut");
// Get beams and average beam momentum
const ParticlePair& beams = apply<Beam>(e, "Beams").beams();
const double meanBeamMom = ( beams.first.p3().mod() +
beams.second.p3().mod() ) / 2.0;
MSG_DEBUG("Avg beam momentum = " << meanBeamMom);
int flavour = 0;
const InitialQuarks& iqf = apply<InitialQuarks>(e, "IQF");
// If we only have two quarks (qqbar), just take the flavour.
// If we have more than two quarks, look for the highest energetic q-qbar pair.
Particles quarks;
if (iqf.particles().size() == 2) {
flavour = iqf.particles().front().abspid();
quarks = iqf.particles();
}
else {
map<int, Particle > quarkmap;
for (const Particle& p : iqf.particles()) {
if (quarkmap.find(p.pid())==quarkmap.end())
quarkmap[p.pid()] = p;
else if (quarkmap[p.pid()].E() < p.E())
quarkmap[p.pid()] = p;
}
double maxenergy = 0.;
for (int i = 1; i <= 5; ++i) {
double energy(0.);
if(quarkmap.find( i)!=quarkmap.end())
energy += quarkmap[ i].E();
if(quarkmap.find(-i)!=quarkmap.end())
energy += quarkmap[-i].E();
if (energy > maxenergy) flavour = i;
}
if(quarkmap.find( flavour)!=quarkmap.end())
quarks.push_back(quarkmap[ flavour]);
if(quarkmap.find(-flavour)!=quarkmap.end())
quarks.push_back(quarkmap[-flavour]);
}
// total multiplicities
switch (flavour) {
case PID::DQUARK:
case PID::UQUARK:
case PID::SQUARK:
_weightLight ->fill();
_weightedTotalChargedPartNumLight ->fill(numParticles);
break;
case PID::CQUARK:
_weightCharm ->fill();
_weightedTotalChargedPartNumCharm ->fill(numParticles);
break;
case PID::BQUARK:
_weightBottom ->fill();
_weightedTotalChargedPartNumBottom ->fill(numParticles);
break;
}
// thrust axis for projections
Vector3 axis = apply<Thrust>(e, "Thrust").thrustAxis();
double dot(0.);
if(!quarks.empty()) {
dot = quarks[0].p3().dot(axis);
if(quarks[0].pid()<0) dot *= -1.;
}
// spectra and individual multiplicities
for (const Particle& p : fs.particles()) {
double pcm = p.p3().mod();
const double xp = pcm/meanBeamMom;
// if in quark or antiquark hemisphere
bool quark = p.p3().dot(axis)*dot>0.;
_h_PCharged ->fill(pcm );
// all charged
switch (flavour) {
case PID::DQUARK:
case PID::UQUARK:
case PID::SQUARK:
_h_XpChargedL->fill(xp);
break;
case PID::CQUARK:
_h_XpChargedC->fill(xp);
break;
case PID::BQUARK:
_h_XpChargedB->fill(xp);
break;
}
int id = p.abspid();
// charged pions
if (id == PID::PIPLUS) {
_h_XpPiPlus->fill(xp);
_h_XpPiPlusTotal->fill(xp);
switch (flavour) {
case PID::DQUARK:
case PID::UQUARK:
case PID::SQUARK:
_h_XpPiPlusL->fill(xp);
_h_NPiPlusL->fill(sqrtS());
if( ( quark && p.pid()>0 ) || ( !quark && p.pid()<0 ))
_h_RPiPlus->fill(xp);
else
_h_RPiMinus->fill(xp);
break;
case PID::CQUARK:
_h_XpPiPlusC->fill(xp);
_h_NPiPlusC->fill(sqrtS());
break;
case PID::BQUARK:
_h_XpPiPlusB->fill(xp);
_h_NPiPlusB->fill(sqrtS());
break;
}
}
else if (id == PID::KPLUS) {
_h_XpKPlus->fill(xp);
_h_XpKPlusTotal->fill(xp);
switch (flavour) {
case PID::DQUARK:
case PID::UQUARK:
case PID::SQUARK:
_h_XpKPlusL->fill(xp);
_h_NKPlusL->fill(sqrtS());
if( ( quark && p.pid()>0 ) || ( !quark && p.pid()<0 ))
_h_RKPlus->fill(xp);
else
_h_RKMinus->fill(xp);
break;
case PID::CQUARK:
_h_XpKPlusC->fill(xp);
_h_NKPlusC->fill(sqrtS());
break;
case PID::BQUARK:
_h_XpKPlusB->fill(xp);
_h_NKPlusB->fill(sqrtS());
break;
}
}
else if (id == PID::PROTON) {
_h_XpProton->fill(xp);
_h_XpProtonTotal->fill(xp);
switch (flavour) {
case PID::DQUARK:
case PID::UQUARK:
case PID::SQUARK:
_h_XpProtonL->fill(xp);
_h_NProtonL->fill(sqrtS());
if( ( quark && p.pid()>0 ) || ( !quark && p.pid()<0 ))
_h_RProton->fill(xp);
else
_h_RPBar ->fill(xp);
break;
case PID::CQUARK:
_h_XpProtonC->fill(xp);
_h_NProtonC->fill(sqrtS());
break;
case PID::BQUARK:
_h_XpProtonB->fill(xp);
_h_NProtonB->fill(sqrtS());
break;
}
}
}
}
void init() {
// Projections
declare(Beam(), "Beams");
declare(ChargedFinalState(), "FS");
declare(InitialQuarks(), "IQF");
declare(Thrust(FinalState()), "Thrust");
// Book histograms
book(_h_PCharged , 1, 1, 1);
book(_h_XpPiPlus , 2, 1, 2);
book(_h_XpKPlus , 3, 1, 2);
book(_h_XpProton , 4, 1, 2);
book(_h_XpPiPlusTotal , 2, 2, 2);
book(_h_XpKPlusTotal , 3, 2, 2);
book(_h_XpProtonTotal , 4, 2, 2);
book(_h_XpPiPlusL , 5, 1, 1);
book(_h_XpPiPlusC , 5, 1, 2);
book(_h_XpPiPlusB , 5, 1, 3);
book(_h_XpKPlusL , 6, 1, 1);
book(_h_XpKPlusC , 6, 1, 2);
book(_h_XpKPlusB , 6, 1, 3);
book(_h_XpProtonL , 7, 1, 1);
book(_h_XpProtonC , 7, 1, 2);
book(_h_XpProtonB , 7, 1, 3);
book(_h_XpChargedL , 8, 1, 1);
book(_h_XpChargedC , 8, 1, 2);
book(_h_XpChargedB , 8, 1, 3);
book(_h_NPiPlusL , 5, 2, 1);
book(_h_NPiPlusC , 5, 2, 2);
book(_h_NPiPlusB , 5, 2, 3);
book(_h_NKPlusL , 6, 2, 1);
book(_h_NKPlusC , 6, 2, 2);
book(_h_NKPlusB , 6, 2, 3);
book(_h_NProtonL , 7, 2, 1);
book(_h_NProtonC , 7, 2, 2);
book(_h_NProtonB , 7, 2, 3);
book(_h_RPiPlus , 9, 1, 1);
book(_h_RPiMinus , 9, 1, 2);
book(_h_RKPlus ,10, 1, 1);
book(_h_RKMinus ,10, 1, 2);
book(_h_RProton ,11, 1, 1);
book(_h_RPBar ,11, 1, 2);
// Ratios: used as target of divide() later
book(_s_PiM_PiP, 9, 1, 3);
book(_s_KM_KP , 10, 1, 3);
book(_s_Pr_PBar, 11, 1, 3);
book(_weightedTotalChargedPartNumLight, "_weightedTotalChargedPartNumLight");
book(_weightedTotalChargedPartNumCharm, "_weightedTotalChargedPartNumCharm");
book(_weightedTotalChargedPartNumBottom, "_weightedTotalChargedPartNumBottom");
book(_weightLight, "_weightLight");
book(_weightCharm, "_weightCharm");
book(_weightBottom, "_weightBottom");
book(tmp1, 8, 2, 1, true);
book(tmp2, 8, 2, 2, true);
book(tmp3, 8, 2, 3, true);
book(tmp4, 8, 3, 2, true);
book(tmp5, 8, 3, 3, true);
}
/// Finalize
void finalize() {
// Multiplicities
/// @todo Include errors
const double avgNumPartsLight = _weightedTotalChargedPartNumLight->val() / _weightLight->val();
const double avgNumPartsCharm = _weightedTotalChargedPartNumCharm->val() / _weightCharm->val();
const double avgNumPartsBottom = _weightedTotalChargedPartNumBottom->val() / _weightBottom->val();
tmp1->point(0).setY(avgNumPartsLight);
tmp2->point(0).setY(avgNumPartsCharm);
tmp3->point(0).setY(avgNumPartsBottom);
tmp4->point(0).setY(avgNumPartsCharm - avgNumPartsLight);
tmp5->point(0).setY(avgNumPartsBottom - avgNumPartsLight);
// Do divisions
divide(*_h_RPiMinus - *_h_RPiPlus, *_h_RPiMinus + *_h_RPiPlus, _s_PiM_PiP);
divide(*_h_RKMinus - *_h_RKPlus, *_h_RKMinus + *_h_RKPlus, _s_KM_KP);
divide(*_h_RProton - *_h_RPBar, *_h_RProton + *_h_RPBar, _s_Pr_PBar);
// Scale histograms
scale(_h_PCharged, 1./sumOfWeights());
scale(_h_XpPiPlus, 1./sumOfWeights());
scale(_h_XpKPlus, 1./sumOfWeights());
scale(_h_XpProton, 1./sumOfWeights());
scale(_h_XpPiPlusTotal, 1./sumOfWeights());
scale(_h_XpKPlusTotal, 1./sumOfWeights());
scale(_h_XpProtonTotal, 1./sumOfWeights());
scale(_h_XpPiPlusL, 1. / *_weightLight);
scale(_h_XpPiPlusC, 1. / *_weightCharm);
scale(_h_XpPiPlusB, 1. / *_weightBottom);
scale(_h_XpKPlusL, 1. / *_weightLight);
scale(_h_XpKPlusC, 1. / *_weightCharm);
scale(_h_XpKPlusB, 1. / *_weightBottom);
scale(_h_XpProtonL, 1. / *_weightLight);
scale(_h_XpProtonC, 1. / *_weightCharm);
scale(_h_XpProtonB, 1. / *_weightBottom);
scale(_h_XpChargedL, 1. / *_weightLight);
scale(_h_XpChargedC, 1. / *_weightCharm);
scale(_h_XpChargedB, 1. / *_weightBottom);
scale(_h_NPiPlusL, 1. / *_weightLight);
scale(_h_NPiPlusC, 1. / *_weightCharm);
scale(_h_NPiPlusB, 1. / *_weightBottom);
scale(_h_NKPlusL, 1. / *_weightLight);
scale(_h_NKPlusC, 1. / *_weightCharm);
scale(_h_NKPlusB, 1. / *_weightBottom);
scale(_h_NProtonL, 1. / *_weightLight);
scale(_h_NProtonC, 1. / *_weightCharm);
scale(_h_NProtonB, 1. / *_weightBottom);
// Paper suggests this should be 0.5/weight but it has to be 1.0 to get normalisations right...
scale(_h_RPiPlus, 1. / *_weightLight);
scale(_h_RPiMinus, 1. / *_weightLight);
scale(_h_RKPlus, 1. / *_weightLight);
scale(_h_RKMinus, 1. / *_weightLight);
scale(_h_RProton, 1. / *_weightLight);
scale(_h_RPBar, 1. / *_weightLight);
// convert ratio to %
_s_PiM_PiP->scaleY(100.);
_s_KM_KP ->scaleY(100.);
_s_Pr_PBar->scaleY(100.);
}
//@}
private:
Scatter2DPtr tmp1, tmp2, tmp3, tmp4, tmp5;
/// Multiplicities
CounterPtr _weightedTotalChargedPartNumLight, _weightedTotalChargedPartNumCharm, _weightedTotalChargedPartNumBottom;
/// Weights
CounterPtr _weightLight, _weightCharm, _weightBottom;
// Histograms
/// @{
Histo1DPtr _h_PCharged;
Histo1DPtr _h_XpPiPlus, _h_XpKPlus, _h_XpProton;
Histo1DPtr _h_XpPiPlusTotal, _h_XpKPlusTotal, _h_XpProtonTotal;
Histo1DPtr _h_XpPiPlusL, _h_XpPiPlusC, _h_XpPiPlusB;
Histo1DPtr _h_XpKPlusL, _h_XpKPlusC, _h_XpKPlusB;
Histo1DPtr _h_XpProtonL, _h_XpProtonC, _h_XpProtonB;
Histo1DPtr _h_XpChargedL, _h_XpChargedC, _h_XpChargedB;
Histo1DPtr _h_NPiPlusL, _h_NPiPlusC, _h_NPiPlusB;
Histo1DPtr _h_NKPlusL, _h_NKPlusC, _h_NKPlusB;
Histo1DPtr _h_NProtonL, _h_NProtonC, _h_NProtonB;
Histo1DPtr _h_RPiPlus, _h_RPiMinus, _h_RKPlus;
Histo1DPtr _h_RKMinus, _h_RProton, _h_RPBar;
Scatter2DPtr _s_PiM_PiP, _s_KM_KP, _s_Pr_PBar;
/// @}
};
RIVET_DECLARE_ALIASED_PLUGIN(SLD_2004_S5693039, SLD_2004_I630327);
}
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