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Rivet analyses reference
HRS_1989_I276948
$\rho^0$, $K^{*0}$ and $K^{*\pm}$ spectra at 29 GeV
Experiment: HRS (PEP)
Inspire ID: 276948
Status: VALIDATED
Authors:
References:
- Phys.Rev.D 40 (1989) 706, 1989
Beams: e+ e-
Beam energies: (14.5, 14.5) GeV
Measurement of the $\rho^0$, $K^{*0}$ and $K^{*\pm}$ spectra at 29 GeV by the HRS experiment.
Source code:
HRS_1989_I276948.cc
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87 | // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief rho0, K*=, K*0 spectra at 29 GeV
class HRS_1989_I276948 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1989_I276948);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
declare(UnstableParticles(), "UFS");
book(_h_x_rho ,1,1,1);
book(_h_x_Kstar0,2,1,1);
book(_h_x_Kstarp,2,1,2);
book(_h_sig_rho ,3,1,1);
book(_h_sig_Kstar0 ,4,1,1);
book(_h_mult_rho ,3,1,3);
book(_h_mult_Kstar0,4,1,3);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
UnstableParticles ufs = apply<UnstableParticles>(event,"UFS");
for(const Particle & p : ufs.particles(Cuts::abspid==113 ||
Cuts::abspid==323 ||
Cuts::abspid==313)) {
Vector3 mom3 = p.p3();
const double energy = p.E();
double modp = mom3.mod();
double beta = modp/energy;
double xE = 2.*modp/sqrtS();
if(p.pid()==113) {
_h_x_rho->fill(xE,1./beta);
_h_sig_rho->fill(sqrtS());
_h_mult_rho->fill(sqrtS());
}
else if(p.pid()==313) {
_h_x_Kstar0->fill(xE,1./beta);
_h_sig_Kstar0->fill(sqrtS());
_h_mult_Kstar0->fill(sqrtS());
}
else {
_h_x_Kstarp->fill(xE,1./beta);
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale( _h_x_rho , sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
scale( _h_x_Kstar0, sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
scale( _h_x_Kstarp, sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
scale( _h_sig_rho , crossSection()/picobarn/sumOfWeights());
scale( _h_sig_Kstar0, crossSection()/picobarn/sumOfWeights());
scale( _h_mult_rho , 1./sumOfWeights());
scale( _h_mult_Kstar0, 1./sumOfWeights());
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_x_rho,_h_x_Kstar0,_h_x_Kstarp;
Histo1DPtr _h_sig_rho,_h_sig_Kstar0;
Histo1DPtr _h_mult_rho,_h_mult_Kstar0;
///@}
};
RIVET_DECLARE_PLUGIN(HRS_1989_I276948);
}
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