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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief inclusive eta production
class DASP_1979_I132410 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(DASP_1979_I132410);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
// Book histograms
book(_c_eta, "/TMP/neta");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
_c_eta->fill(ufs.particles(Cuts::pid==221).size());
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_c_eta,1./sumOfWeights()*crossSection()/nanobarn);
Scatter2D temphisto(refData(1, 1, 1));
Scatter2DPtr mult;
book(mult, 1, 1, 1);
for (size_t b = 0; b < temphisto.numPoints(); b++) {
const double x = temphisto.point(b).x();
pair<double,double> ex = temphisto.point(b).xErrs();
pair<double,double> ex2 = ex;
if(ex2.first ==0.) ex2. first=0.0001;
if(ex2.second==0.) ex2.second=0.0001;
if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
mult->addPoint(x, _c_eta->val(), ex, make_pair(_c_eta->err(),_c_eta->err()));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
//@}
/// @name Histograms
//@{
CounterPtr _c_eta;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(DASP_1979_I132410);
}
|