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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/Sphericity.hh"
#include "Rivet/Projections/Thrust.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/ParisiTensor.hh"
#include "Rivet/Projections/Hemispheres.hh"
namespace Rivet {
/// @brief event shapes at 172, 183, 189
class OPAL_2000_I513476 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(OPAL_2000_I513476);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
// Projections
declare(Beam(), "Beams");
const FinalState fs;
declare(fs, "FS");
const ChargedFinalState cfs;
declare(cfs, "CFS");
declare(FastJets(fs, FastJets::DURHAM, 0.7), "DurhamJets");
declare(Sphericity(fs), "Sphericity");
declare(ParisiTensor(fs), "Parisi");
const Thrust thrust(fs);
declare(thrust, "Thrust");
declare(Hemispheres(thrust), "Hemispheres");
// Book histograms
int ih=-1;
if (isCompatibleWithSqrtS(172.)) {
ih = 1;
} else if (isCompatibleWithSqrtS(183.)) {
ih = 2;
} else if (isCompatibleWithSqrtS(189.)) {
ih = 3;
}
else {
throw Error("Invalid CMS energy for OPAL_2000_I513476");
}
book(_h_thrust , 1,1,ih);
book(_h_major , 2,1,ih);
book(_h_minor , 3,1,ih);
book(_h_aplanarity, 4,1,ih);
book(_h_oblateness, 5,1,ih);
book(_h_C , 6,1,ih);
book(_h_rhoH , 7,1,ih);
book(_h_sphericity, 8,1,ih);
book(_h_totalB , 9,1,ih);
book(_h_wideB , 10,1,ih);
book(_h_y23 , 11,1,ih);
book(_h_mult , 13,1,ih);
book(_h_pTin , 15,1,ih);
book(_h_pTout , 16,1,ih);
book(_h_y , 17,1,ih);
book(_h_x , 18,1,ih);
book(_h_xi , 19,1,ih);
book(_sumW,"/TMP/sumW");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
const FinalState& cfs = apply<FinalState>(event, "CFS");
if (cfs.size() < 2) vetoEvent;
_sumW->fill();
// Get beams and average beam momentum
const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
const double meanBeamMom = ( beams.first.p3().mod() +
beams.second.p3().mod() ) / 2.0;
// Thrust related
const Thrust& thrust = apply<Thrust>(event, "Thrust");
_h_thrust ->fill(thrust.thrust() );
_h_major ->fill(thrust.thrustMajor());
_h_minor ->fill(thrust.thrustMinor());
_h_oblateness->fill(thrust.oblateness() );
// Sphericity related
const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
_h_sphericity->fill(sphericity.sphericity());
_h_aplanarity->fill(sphericity.aplanarity());
// C parameter
const ParisiTensor& parisi = apply<ParisiTensor>(event, "Parisi");
_h_C->fill(parisi.C());
// Hemispheres
const Hemispheres& hemi = apply<Hemispheres>(event, "Hemispheres");
_h_rhoH ->fill(hemi.scaledMhigh());
_h_wideB ->fill(hemi.Bmax());
_h_totalB->fill(hemi.Bsum());
// Jets
const FastJets& durjet = apply<FastJets>(event, "DurhamJets");
const double y23 = durjet.clusterSeq()->exclusive_ymerge_max(2);
_h_y23->fill(y23);
// charged particles
_h_mult->fill(cfs.particles().size());
for (const Particle& p : cfs.particles()) {
const Vector3 mom3 = p.p3();
const double energy = p.E();
const double pTinT = dot(mom3, thrust.thrustMajorAxis());
const double pToutT = dot(mom3, thrust.thrustMinorAxis());
_h_pTin ->fill(fabs(pTinT/GeV) );
_h_pTout->fill(fabs(pToutT/GeV));
const double momT = dot(thrust.thrustAxis(), mom3);
const double rapidityT = 0.5 * std::log((energy + momT) / (energy - momT));
_h_y->fill(fabs(rapidityT));
const double mom = mom3.mod();
const double scaledMom = mom/meanBeamMom;
const double logInvScaledMom = -std::log(scaledMom);
_h_xi->fill(logInvScaledMom);
_h_x ->fill(scaledMom );
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_thrust ,1./ *_sumW);
scale(_h_major ,1./ *_sumW);
scale(_h_minor ,1./ *_sumW);
scale(_h_aplanarity,1./ *_sumW);
scale(_h_oblateness,1./ *_sumW);
scale(_h_C ,1./ *_sumW);
scale(_h_rhoH ,1./ *_sumW);
scale(_h_sphericity,1./ *_sumW);
scale(_h_totalB ,1./ *_sumW);
scale(_h_wideB ,1./ *_sumW);
scale(_h_y23 ,1./ *_sumW);
scale(_h_mult ,200./ *_sumW);
scale(_h_pTin ,1./ *_sumW);
scale(_h_pTout ,1./ *_sumW);
scale(_h_y ,1./ *_sumW);
scale(_h_x ,1./ *_sumW);
scale(_h_xi ,1./ *_sumW);
// mean multiplicity
double nch = _h_mult->xMean();
double nch_err = _h_mult->xStdErr();
Scatter2DPtr m_ch;
book(m_ch,14,1,1);
m_ch->addPoint(sqrtS()/GeV,nch,0.,nch_err);
// mean ptIn
double pTin = _h_pTin->xMean();
double pTin_err = _h_pTin->xStdErr();
Scatter2DPtr m_pTin;
book(m_pTin,20,1,1);
m_pTin->addPoint(sqrtS()/GeV,pTin,0.,pTin_err);
// mean ptOut
double pTout = _h_pTout->xMean();
double pTout_err = _h_pTout->xStdErr();
Scatter2DPtr m_pTout;
book(m_pTout,20,1,2);
m_pTout->addPoint(sqrtS()/GeV,pTout,0.,pTout_err);
// mean y
double y = _h_y->xMean();
double y_err = _h_y->xStdErr();
Scatter2DPtr m_y;
book(m_y,20,1,3);
m_y->addPoint(sqrtS()/GeV,y,0.,y_err);
// mean x
double x = _h_x->xMean();
double x_err = _h_x->xStdErr();
Scatter2DPtr m_x;
book(m_x,20,1,4);
m_x->addPoint(sqrtS()/GeV,x,0.,x_err);
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_thrust,_h_major,_h_minor,_h_aplanarity,_h_oblateness,_h_C,_h_rhoH,_h_sphericity;
Histo1DPtr _h_totalB,_h_wideB,_h_y23,_h_mult,_h_pTin,_h_pTout,_h_y,_h_x,_h_xi;
CounterPtr _sumW;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(OPAL_2000_I513476);
}
|