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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Particle.hh"
namespace Rivet {
class NA49_2006_I694016 : public Analysis {
public:
/// @name Constructors etc.
//@{
/// Constructor
NA49_2006_I694016() : Analysis("NA49_2006_I694016"){}
void init() {
declare(FinalState(), "FS");
book(_h_dndxf, 1,1,1);
book(_p_mptxf, 2,1,1);
book(_h_dndy, 3,1,1);
book(_c_ninel, "nInelastic");
}
void analyze(const Event& event) {
const FinalState& fs = apply<FinalState>(event, "FS");
const size_t numParticles = fs.particles().size();
const float SRT = event.sqrtS();
// Inelastic events selection
if (numParticles <= 2) {
MSG_DEBUG("Elastic event");
vetoEvent;
}
_c_ninel -> fill();
// Plot distributions
for(const Particle& p : fs.particles()) {
if(p.pid() == PID::PIPLUS){
double xF = p.pz() / (SRT/2.);
_h_dndxf -> fill(xF);
_h_dndy -> fill(p.rapidity());
_p_mptxf -> fill(xF, p.pt());
}
}
}
void finalize() {
scale(_h_dndxf, 1./ *_c_ninel); // Scale by the number of inelastic events
vector<YODA::HistoBin1D>& bins = _h_dndxf -> bins(); // Get histogram bins
for (auto b : bins) b.scaleW(1./b.xWidth()); // Scale by the bin width (dxF)
scale(_h_dndy, 1./ *_c_ninel);
vector<YODA::HistoBin1D>& binsy = _h_dndy -> bins();
for (auto by : binsy) by.scaleW(1./by.xWidth());
}
private:
CounterPtr _c_ninel; // Counter of inelastic events
Histo1DPtr _h_dndxf; // dn/dxf histogram
Histo1DPtr _h_dndy; // dn/dy histogram
Profile1DPtr _p_mptxf; // mean pT vs xF profile
};
RIVET_DECLARE_PLUGIN(NA49_2006_I694016);
}
|