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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Particle.hh"
namespace Rivet {
class ATLAS_2012_I1118269 : public Analysis {
public:
ATLAS_2012_I1118269() : Analysis("ATLAS_2012_I1118269")
{ }
void init() {
book(_h_sigma_vs_pt ,1, 1, 1);
book(_h_sigma_vs_eta ,2, 1, 1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
Particles bhadrons;
for(ConstGenParticlePtr p: HepMCUtils::particles(event.genEvent())) {
if (!( PID::isHadron( p->pdg_id() ) && PID::hasBottom( p->pdg_id() )) ) continue;
ConstGenVertexPtr dv = p->end_vertex();
/// @todo In future, convert to use built-in 'last B hadron' function
bool hasBdaughter = false;
if ( PID::isHadron( p->pdg_id() ) && PID::hasBottom( p->pdg_id() )) { // b-hadron selection
if (dv) {
/// @todo particles_out_const_iterator is deprecated in HepMC3
for(ConstGenParticlePtr pp: HepMCUtils::particles(dv, Relatives::CHILDREN)){
if ( PID::isHadron( pp->pdg_id() ) && PID::hasBottom( pp->pdg_id()) ) {
hasBdaughter = true;
}
}
}
}
if (hasBdaughter) continue;
bhadrons += Particle(*p);
}
for (const Particle& particle : bhadrons) {
double eta = particle.eta();
double pt = particle.pT();
if (!(inRange(eta, -2.5, 2.5))) continue;
if (pt < 9.*GeV) continue;
_h_sigma_vs_pt->fill(pt);
_h_sigma_vs_eta->fill(fabs(eta));
}
}
void finalize() {
scale(_h_sigma_vs_pt, crossSection()/nanobarn/sumOfWeights());
scale(_h_sigma_vs_eta, crossSection()/microbarn/sumOfWeights());
}
private:
Histo1DPtr _h_sigma_vs_pt;
Histo1DPtr _h_sigma_vs_eta;
};
// Hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1118269);
}
|