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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Projections/Thrust.hh"
#include "Rivet/Projections/Hemispheres.hh"
namespace Rivet {
/// @brief Event shapes at 29 GeV
class MARKII_1988_I246184 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1988_I246184);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
const FinalState fs;
declare(fs, "FS");
const ChargedFinalState cfs;
declare(cfs, "CFS");
Sphericity sphere(fs);
declare(sphere, "Sphericity");
declare(Thrust (fs), "Thrust" );
declare(Hemispheres(sphere), "Hemispheres");
// histograms
unsigned int ioff=18;
for(unsigned int ix=0;ix<3;++ix) {
book(_histAplanarity [ix] , 1+ioff*ix, 1, 1);
book(_histQx [ix] , 2+ioff*ix, 1, 1);
book(_histQ2Q1 [ix] , 3+ioff*ix, 1, 1);
book(_histSphericity [ix] , 4+ioff*ix, 1, 1);
book(_histThrust [ix] , 5+ioff*ix, 1, 1);
book(_histMinor [ix] , 6+ioff*ix, 1, 1);
book(_histOblateness [ix] , 7+ioff*ix, 1, 1);
book(_histMJetBroad [ix] , 8+ioff*ix, 1, 1);
book(_histMJetSlim [ix] , 9+ioff*ix, 1, 1);
book(_histMJetDiff [ix] ,10+ioff*ix, 1, 1);
book(_histScaledMom [ix] ,15+ioff*ix, 1, 1);
book(_histPt2S [ix] ,11+ioff*ix, 1, 1);
book(_histPtS [ix] ,12+ioff*ix, 1, 1);
book(_histPtSIn [ix] ,14+ioff*ix, 1, 1);
book(_histPtSOut [ix] ,13+ioff*ix, 1, 1);
book(_histRapidityS [ix] ,16+ioff*ix, 1, 1);
book(_histTheta [ix] ,17+ioff*ix, 1, 1);
book(_histETheta [ix] ,18+ioff*ix, 1, 1);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Sphericity related
const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
for(unsigned int ix=0;ix<3;++ix) {
_histSphericity[ix]->fill(sphericity.sphericity());
_histAplanarity[ix]->fill(sphericity.aplanarity());
_histQx [ix]->fill((sphericity.lambda1()-sphericity.lambda2())/sqrt(3.));
_histQ2Q1 [ix]->fill(sphericity.lambda2()-sphericity.lambda3());
}
// thrust related
const Thrust& thrust = apply<Thrust>(event, "Thrust");
for(unsigned int ix=0;ix<3;++ix) {
_histThrust [ix]->fill(thrust.thrust());
_histMinor [ix]->fill(thrust.thrustMinor());
_histOblateness[ix]->fill(thrust.oblateness());
}
// hemisphere related
const Hemispheres& hemi = apply<Hemispheres>(event, "Hemispheres");
double mWide = hemi.scaledM2high(), mNarrow = hemi.scaledM2low();
if(!hemi.massMatchesBroadening()) swap(mWide,mNarrow);
for(unsigned int ix=0;ix<3;++ix) {
_histMJetBroad[ix]->fill(mWide);
_histMJetSlim [ix]->fill(mNarrow);
_histMJetDiff [ix]->fill(hemi.scaledM2diff());
}
// dists w.r.t sphericity axis
const FinalState& cfs = apply<FinalState>(event, "CFS");
for (const Particle& p : cfs.particles()) {
// Get momentum and energy of each particle.
const Vector3 mom3 = p.p3();
const double energy = p.E();
// Scaled momenta.
const double mom = mom3.mod();
const double scaledMom = 2.*mom/sqrtS();
// Get momenta components w.r.t. thrust and sphericity.
const double pTinS = dot(mom3, sphericity.sphericityMajorAxis());
const double pToutS = dot(mom3, sphericity.sphericityMinorAxis());
double pT2 = sqr(pTinS)+sqr(pToutS);
double pT = sqrt(pT2);
const double momS = dot(sphericity.sphericityAxis(), mom3);
const double rapidityS = 0.5 * std::log((energy + momS) / (energy - momS));
// angle
double theta = sphericity.sphericityAxis().angle(mom3)/M_PI*180.;
if(theta>90.) theta=180.-theta;
// fill histos
for(unsigned int ix=0;ix<3;++ix) {
_histScaledMom[ix]->fill(scaledMom);
_histPt2S [ix]->fill(fabs(pT2/GeV));
_histPtS [ix]->fill(fabs(pT/GeV));
_histPtSIn [ix]->fill(fabs(pTinS/GeV));
_histPtSOut [ix]->fill(fabs(pToutS/GeV));
_histRapidityS[ix]->fill(fabs(rapidityS));
_histTheta [ix]->fill(theta);
}
}
// energy flow includes neutral w.r.t sphericity axis
const FinalState& fs = apply<FinalState>(event, "FS");
for (const Particle& p : fs.particles()) {
// Get momentum and energy of each particle.
const Vector3 mom3 = p.p3();
const double energy = p.E();
// angle
double theta = sphericity.sphericityAxis().angle(mom3)/M_PI*180.;
if(theta>90.) theta=180.-theta;
// fill histos
for(unsigned int ix=0;ix<3;++ix) {
_histETheta [ix]->fill(theta,energy);
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
for(unsigned int ix=0;ix<3;++ix) {
scale(_histAplanarity [ix] ,1./sumOfWeights());
scale(_histQx [ix] ,1./sumOfWeights());
scale(_histQ2Q1 [ix] ,1./sumOfWeights());
scale(_histSphericity [ix] ,1./sumOfWeights());
scale(_histThrust [ix] ,1./sumOfWeights());
scale(_histMinor [ix] ,1./sumOfWeights());
scale(_histOblateness [ix] ,1./sumOfWeights());
scale(_histMJetBroad [ix] ,1./sumOfWeights());
scale(_histMJetSlim [ix] ,1./sumOfWeights());
scale(_histMJetDiff [ix] ,1./sumOfWeights());
scale(_histScaledMom [ix] ,1./sumOfWeights());
scale(_histPt2S [ix] ,1./sumOfWeights());
scale(_histPtS [ix] ,1./sumOfWeights());
scale(_histPtSIn [ix] ,1./sumOfWeights());
scale(_histPtSOut [ix] ,1./sumOfWeights());
scale(_histRapidityS [ix] ,1./sumOfWeights());
scale(_histTheta [ix] ,1./sumOfWeights());
scale(_histETheta [ix] ,1./sumOfWeights());
}
}
///@}
/// @name Histograms
///@{
Histo1DPtr _histAplanarity[3],_histQx[3],_histQ2Q1[3],_histSphericity[3];
Histo1DPtr _histThrust[3],_histMinor[3],_histOblateness[3];
Histo1DPtr _histMJetBroad[3],_histMJetSlim[3],_histMJetDiff[3];
Histo1DPtr _histScaledMom[3],_histPt2S[3],_histPtS[3],_histPtSIn[3],_histPtSOut[3],_histRapidityS[3];
Histo1DPtr _histTheta[3],_histETheta[3];
///@}
};
RIVET_DECLARE_PLUGIN(MARKII_1988_I246184);
}
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