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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Spectrum for Omega_c
class BABAR_2007_I746745 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(BABAR_2007_I746745);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
declare(UnstableParticles(),"UFS");
book(_h_p,1,1,1);
book(_b ,2,1,1);
book(_r ,3,1,1);
book(_ups,"/TMP/ups");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
static const int idOmega = 4332;
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
bool ups = !ufs.particles(Cuts::pid==300553).empty();
if(ups) _ups->fill();
for (const Particle& p : ufs.particles(Cuts::abspid==idOmega)) {
_h_p->fill(p.momentum().p3().mod());
if(p.children().size()==2) {
int sign = p.pid()/p.abspid();
if((p.children()[0].pid()==sign*3334 &&
p.children()[1].pid()==sign*211) ||
(p.children()[1].pid()==sign*3334 &&
p.children()[0].pid()==sign*211) ) {
if(ups) _b->fill(0.5);
else _r->fill(0.5);
}
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
normalize(_h_p);
if(_ups->effNumEntries()!=0) {
scale(_b,0.5/ *_ups);
}
scale(_r,crossSection()/sumOfWeights()/femtobarn);
}
///@}
/// @name Histograms
///@{
Histo1DPtr _h_p,_b,_r;
CounterPtr _ups;
///@}
};
RIVET_DECLARE_PLUGIN(BABAR_2007_I746745);
}
|