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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Hadron Spectra in $e^+e^-$ collisions at 29 GeV
class HRS_1987_I215848 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1987_I215848);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
declare(UnstableParticles(), "UFS");
book(_h_pi ,2,1,1);
book(_h_Kp ,3,1,1);
book(_h_p ,4,1,1);
book(_h_K0 ,5,1,1);
book(_h_lam,6,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for(const Particle & p : ufs.particles()) {
double xE = 2.*p.E()/sqrtS();
const double beta = p.p3().mod() / p.E();
if(p.pid()==130 || p.pid()==310)
_h_K0 ->fill(xE,1./beta);
else if(p.abspid()==321)
_h_Kp ->fill(xE,1./beta);
else if(p.abspid()==211)
_h_pi ->fill(xE,1./beta);
else if(p.abspid()==2212)
_h_p ->fill(xE,1./beta);
else if(p.abspid()==3122)
_h_lam->fill(xE,1./beta);
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_pi , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
scale(_h_Kp , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
scale(_h_p , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
scale(_h_K0 , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
scale(_h_lam, crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_pi,_h_Kp,_h_p,_h_K0,_h_lam;
///@}
};
RIVET_DECLARE_PLUGIN(HRS_1987_I215848);
}
|