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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Analyses/MC_Cent_pPb.hh"
#include "Rivet/Projections/ImpactParameterProjection.hh"
namespace Rivet {
/// Generic analysis looking at various distributions of final state particles
class MC_Cent_pPb_Calib : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(MC_Cent_pPb_Calib);
/// Book histograms and initialise projections before the run
void init() {
// One projection for the actual observable, and one for the
// generated impact parameter.
declare(MC_SumETFwdPbCentrality(), "Centrality");
declare(ImpactParameterProjection(), "IMP");
declare(MC_pPbMinBiasTrigger(), "Trigger");
// The calibrationhistogram:
book(_calib, "SumETPb", 100, 0.0, 200.0);
// If histogram was pre-loaded, the calibration is done.
_done = ( _calib->numEntries() > 0 );
// The alternative histogram based on impact parameter. Note that
// it MUST be named the same as the histogram for the experimental
// observable with an added _IMP suffix for the Pecentile<>
// binning to work properly.
book(_impcalib, "SumETPb_IMP", 400, 0.0, 20.0);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
if ( _done ) return;
// The alternative centrality based on generated impact
// parameter, assumes that the generator does not describe the
// full final state, and should therefore be filled even if the
// event is not triggered.
_impcalib->fill(apply<SingleValueProjection>(event, "IMP")());
if ( !apply<TriggerProjection>(event, "Trigger")() ) vetoEvent;
_calib->fill(apply<SingleValueProjection>(event, "Centrality")());
}
/// Finalize
void finalize() {
_calib->normalize();
_impcalib->normalize();
}
private:
/// The calibration histograms.
Histo1DPtr _calib;
Histo1DPtr _impcalib;
/// Safeguard from adding to a pre-loaded histogram.
bool _done;
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(MC_Cent_pPb_Calib);
}
|