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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/Thrust.hh"
namespace Rivet {
/// @brief N charged vs thrust
class TOPAZ_1997_I454183 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(TOPAZ_1997_I454183);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
ChargedFinalState cfs;
declare(cfs , "CFS");
declare(Thrust(cfs), "Thrust");
// Book histograms
book(_p_charged ,3,1,1);
book(_c_ncharged,1,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// First, veto on leptonic events by requiring at least 5 charged FS particles
const ChargedFinalState& cfs = apply<ChargedFinalState>(event, "CFS");
const size_t numParticles = cfs.particles().size();
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
if (numParticles < 5) {
MSG_DEBUG("Failed leptonic event cut");
vetoEvent;
}
MSG_DEBUG("Passed leptonic event cut");
// thrust
const Thrust& thrust = apply<Thrust>(event, "Thrust");
_c_ncharged->fill(cfs.particles().size());
_p_charged->fill(-log(1.-thrust.thrust()),cfs.particles().size());
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_c_ncharged,1./sumOfWeights());
}
//@}
/// @name Histograms
//@{
Profile1DPtr _p_charged;
CounterPtr _c_ncharged;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(TOPAZ_1997_I454183);
}
|