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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Tools/AtlasCommon.hh"
namespace Rivet {
/// @brief Add a short analysis description here
class ATLAS_2015_I1386475 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2015_I1386475);
/// Book histograms and initialise projections before the run
void init() {
// The centrality projection.
declareCentrality(ATLAS::SumET_PB_Centrality(),
"ATLAS_pPb_Calib", "SumETPb", "CENT");
// The trigger projection.
declare(ATLAS::MinBiasTrigger(), "Trigger");
// The particles to be analysed.
declare(ChargedFinalState(Cuts::eta > -2.7 && Cuts::eta < 2.7 &&
Cuts::pT > 0.1*GeV), "CFS");
// The centrality bins' upper edges.
centralityBins = {90., 60., 40., 30., 20., 10., 5., 1.};
for (int i = 0; i < 8; ++i) {
book(histEta[centralityBins[i]], 2, 1, i + 1);
book(sow[centralityBins[i]], "_sow"+to_string(i) + "Counter");
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Apply event triggers.
if ( !apply<ATLAS::MinBiasTrigger>(event, "Trigger")() ) vetoEvent;
// We must have direct acces to the centrality projection.
const CentralityProjection& cent =
apply<CentralityProjection>(event,"CENT");
double c = cent();
// Find the correct centrality histogram
auto hItr = histEta.upper_bound(c);
if (hItr == histEta.end()) return;
// Find the correct sow.
auto sItr = sow.upper_bound(c);
if (sItr == sow.end()) return;
sItr->second->fill();
for ( const auto &p : apply<ChargedFinalState>(event,"CFS").particles() )
hItr->second->fill(p.eta());
}
/// Finalize
void finalize() {
// Scale by the inverse sum of event weights in each centrality
// bin.
for (int i = 0; i < 8; ++i)
histEta[centralityBins[i]]->scaleW(1./sow[centralityBins[i]]->sumW());
}
private:
/// The histograms binned in centrality.
vector<double> centralityBins;
map<double,Histo1DPtr> histEta;
map<double, CounterPtr> sow;
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2015_I1386475);
}
|