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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief pi0 and charged particle spectra
class L3_1991_I314407 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(L3_1991_I314407);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
// projections
declare(ChargedFinalState(), "FS");
declare(UnstableParticles(), "UFS");
// book histos
book(_h_pi0_x ,3,1,1);
book(_h_pi0_xi ,4,1,1);
book(_h_charged_x ,5,1,1);
book(_h_charged_xi,6,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const FinalState& fs = apply<FinalState>(event, "FS");
for (const Particle& p : fs.particles()) {
const double x = 2.*p.momentum().p3().mod()/sqrtS();
_h_charged_x ->fill(x);
_h_charged_xi->fill(-log(x));
}
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for (const Particle & p : ufs.particles(Cuts::pid==PID::PI0)) {
const double x = 2.*p.momentum().p3().mod()/sqrtS();
_h_pi0_x ->fill(x);
_h_pi0_xi->fill(-log(x));
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_pi0_x , 1./sumOfWeights());
scale(_h_pi0_xi , 1./sumOfWeights());
scale(_h_charged_x , 1./sumOfWeights());
scale(_h_charged_xi, 1./sumOfWeights());
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_pi0_x,_h_pi0_xi,_h_charged_x,_h_charged_xi;
///@}
};
RIVET_DECLARE_PLUGIN(L3_1991_I314407);
}
|