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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief pi0 and eta spectra at 91 GeV
class L3_1994_I374698 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(L3_1994_I374698);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
// projections
declare(UnstableParticles(), "UFS");
// book histos
book(_h_pi0_x_P , 5,1,1);
book(_h_pi0_x_H , 6,1,1);
book(_h_pi0_xi , 7,1,1);
book(_h_eta_x_P , 8,1,1);
book(_h_eta_x_H , 9,1,1);
book(_h_eta_xi ,10,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for (const Particle & p : ufs.particles(Cuts::pid==PID::PI0 ||
Cuts::pid==PID::ETA)) {
const double x = 2.*p.momentum().p3().mod()/sqrtS();
if(p.pid()==PID::PI0) {
_h_pi0_x_P->fill(x);
_h_pi0_x_H->fill(x);
_h_pi0_xi->fill(-log(x));
}
else {
_h_eta_x_P->fill(x);
_h_eta_x_H->fill(x);
_h_eta_xi->fill(-log(x));
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_pi0_x_P , 1./sumOfWeights());
scale(_h_pi0_x_H , 1./sumOfWeights());
scale(_h_pi0_xi , 1./sumOfWeights());
scale(_h_eta_x_P , 1./sumOfWeights());
scale(_h_eta_x_H , 1./sumOfWeights());
scale(_h_eta_xi , 1./sumOfWeights());
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_pi0_x_P,_h_pi0_x_H,_h_pi0_xi;
Histo1DPtr _h_eta_x_P,_h_eta_x_H,_h_eta_xi;
///@}
};
RIVET_DECLARE_PLUGIN(L3_1994_I374698);
}
|