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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Xi_c+ spectrum
class CLEOII_1995_I404590 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(CLEOII_1995_I404590);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
// projections
declare(Beam(), "Beams");
declare(UnstableParticles(), "UFS");
// book histos
book(_h_x,2,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
static const int idXi = 4232;
const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
const double Emax = ( beams.first.p3().mod() + beams.second.p3().mod() ) / 2.0;
const double Pmax = sqrt(sqr(Emax)-sqr(2.468));
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for (const Particle& p : ufs.particles(Cuts::abspid==idXi)) {
double xp = p.momentum().p3().mod()/Pmax;
_h_x->fill(xp);
}
}
/// Normalise histograms etc., after the run
void finalize() {
normalize(_h_x,1,false);
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_x;
///@}
};
RIVET_DECLARE_PLUGIN(CLEOII_1995_I404590);
}
|