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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief K+/K0 specta at 29 GeV
class MARKII_1985_I207785 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1985_I207785);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
//Histograms
book(_h_K0,2,1,1);
book(_h_Kp,4,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for (const Particle& p : ufs.particles(Cuts::abspid==321 or Cuts::abspid==310 or Cuts::abspid==130)) {
const double xp = 2.*p.p3().mod()/sqrtS();
const double beta = p.p3().mod() / p.E();
if(p.abspid()==321)
_h_Kp->fill(xp,1./beta);
else
_h_K0->fill(xp,1./beta);
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_K0, 1./sumOfWeights());
scale(_h_Kp, 1./sumOfWeights());
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_K0,_h_Kp;
///@}
};
RIVET_DECLARE_PLUGIN(MARKII_1985_I207785);
}
|