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CDF_1990_S2089246.cc
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CDF_1990_S2089246.cc
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// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Tools/Logging.hh"
#include "Rivet/RivetAIDA.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/TriggerCDFRun0Run1.hh"
namespace Rivet {
/// @brief CDF pseudorapidity analysis at 630 and 1800 GeV
/// @author Andy Buckley
class CDF_1990_S2089246 : public Analysis {
public:
/// Constructor
CDF_1990_S2089246()
: Analysis("CDF_1990_S2089246")
{
setBeams(PROTON, ANTIPROTON);
_sumWTrig = 0;
}
/// @name Analysis methods
//@{
void init() {
// Setup projections
addProjection(TriggerCDFRun0Run1(), "Trigger");
addProjection(ChargedFinalState(-3.5, 3.5), "CFS");
// Book histo
if (fuzzyEquals(sqrtS()/GeV, 1800, 1E-3)) {
_hist_eta = bookHistogram1D(3, 1, 1);
} else if (fuzzyEquals(sqrtS()/GeV, 630, 1E-3)) {
_hist_eta = bookHistogram1D(4, 1, 1);
}
}
/// Do the analysis
void analyze(const Event& event) {
// Trigger
const bool trigger = applyProjection<TriggerCDFRun0Run1>(event, "Trigger").minBiasDecision();
if (!trigger) vetoEvent;
const double weight = event.weight();
_sumWTrig += weight;
// Loop over final state charged particles to fill eta histos
const FinalState& fs = applyProjection<FinalState>(event, "CFS");
foreach (const Particle& p, fs.particles()) {
const double eta = p.momentum().pseudorapidity();
_hist_eta->fill(fabs(eta), weight);
}
}
/// Finalize
void finalize() {
// Divide through by num events to get d<N>/d(eta) in bins
// Factor of 1/2 for |eta| -> eta
scale(_hist_eta, 0.5/_sumWTrig);
}
//@}
private:
/// @name Weight counter
//@{
double _sumWTrig;
//@}
/// @name Histogram collections
//@{
AIDA::IHistogram1D* _hist_eta;
//@}
};
// This global object acts as a hook for the plugin system
AnalysisBuilder<CDF_1990_S2089246> plugin_CDF_1990_S2089246;
}

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