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Rivet analyses reference
MARKI_1976_I109792
Charged particle momentum distributions for energies between 3.0 and 7.4 GeV
Experiment: MARK-I (SPEAR)
Inspire ID: 109792
Status: VALIDATED
Authors:
No references listed
Beams: e- e+
Beam energies: (1.5, 1.5); (2.4, 2.4); (2.9, 2.9); (3.1, 3.1); (3.3, 3.3); (3.5, 3.5); (3.7, 3.7) GeV
Run details:
- e+e- > hadrons. Beam energy must be specified as analysis option "ENERGY" when rivet-merge'ing samples.
Charged particle momentum distributions for energies between 3.0 and 7.4 GeV. Beam energy must be specified as analysis option "ENERGY" when rivet-merging samples.
Source code:
MARKI_1976_I109792.cc
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81 | // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
namespace Rivet {
/// @brief Charged particle spectra between 3.0 and 7.4 GeV
class MARKI_1976_I109792 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(MARKI_1976_I109792);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
const ChargedFinalState fs;
declare(fs, "FS");
unsigned int iloc(0);
if(isCompatibleWithSqrtS(3.0))
iloc = 8;
else if(isCompatibleWithSqrtS(4.8))
iloc = 7;
else if(isCompatibleWithSqrtS(5.8))
iloc = 6;
else if(isCompatibleWithSqrtS(6.2))
iloc = 5;
else if(isCompatibleWithSqrtS(6.6))
iloc = 4;
else if(isCompatibleWithSqrtS(7.0))
iloc = 3;
else if(isCompatibleWithSqrtS(7.4))
iloc = 2;
else
MSG_ERROR("Beam energy incompatible with analysis.");
assert(iloc!=0);
book(_h_x, iloc ,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const ChargedFinalState& fs = apply<ChargedFinalState>(event, "FS");
if(fs.particles().size()==2 &&
abs(fs.particles()[0].pid())==13 &&
abs(fs.particles()[1].pid())==13) vetoEvent;
for (const Particle& p : fs.particles()) {
const Vector3 mom3 = p.p3();
double pp = mom3.mod();
double x = 2.*pp/sqrtS();
_h_x->fill(x);
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_x,crossSection()*sqr(sqrtS())/sumOfWeights()/microbarn);
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_x;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(MARKI_1976_I109792);
}
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