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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ZFinder.hh"
#include "Rivet/Projections/FastJets.hh"
namespace Rivet {
/// @brief D0 differential Z/\f$ \gamma^* \f$ + jet + \f$ X \f$ cross sections
///
/// @author Gavin Hesketh, Andy Buckley, Frank Siegert
class D0_2008_S7863608 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(D0_2008_S7863608);
/// @name Analysis methods
/// @{
/// Book histograms
void init() {
/// @todo These clustering arguments look odd: are they ok?
Cut cut = Cuts::abseta < 1.7 && Cuts::pT > 15*GeV;
ZFinder zfinder(FinalState(), cut, PID::MUON, 65*GeV, 115*GeV, 0.2, ZFinder::ClusterPhotons::NONE, ZFinder::AddPhotons::YES);
declare(zfinder, "ZFinder");
FastJets conefinder(zfinder.remainingFinalState(), FastJets::D0ILCONE, 0.5);
declare(conefinder, "ConeFinder");
book(_sum_of_weights_inclusive, "sum_of_weights_inclusive");
book(_h_jet_pT_cross_section ,1, 1, 1);
book(_h_jet_pT_normalised ,1, 1, 2);
book(_h_jet_y_cross_section ,2, 1, 1);
book(_h_jet_y_normalised ,2, 1, 2);
book(_h_Z_pT_cross_section ,3, 1, 1);
book(_h_Z_pT_normalised ,3, 1, 2);
book(_h_Z_y_cross_section ,4, 1, 1);
book(_h_Z_y_normalised ,4, 1, 2);
book(_h_total_cross_section ,5, 1, 1);
}
// Do the analysis
void analyze(const Event& e) {
const ZFinder& zfinder = apply<ZFinder>(e, "ZFinder");
if (zfinder.bosons().size()==1) {
_sum_of_weights_inclusive->fill();
const JetAlg& jetpro = apply<JetAlg>(e, "ConeFinder");
const Jets& jets = jetpro.jetsByPt(20*GeV);
Jets jets_cut;
for (const Jet& j : jets) {
if (j.abseta() < 2.8) {
jets_cut.push_back(j);
}
}
// Return if there are no jets:
if(jets_cut.size()<1) {
MSG_DEBUG("Skipping event " << numEvents() << " because no jets pass cuts ");
vetoEvent;
}
const FourMomentum Zmom = zfinder.bosons()[0].momentum();
// In jet pT
_h_jet_pT_cross_section->fill( jets_cut[0].pT());
_h_jet_pT_normalised->fill( jets_cut[0].pT());
_h_jet_y_cross_section->fill( fabs(jets_cut[0].rapidity()));
_h_jet_y_normalised->fill( fabs(jets_cut[0].rapidity()));
// In Z pT
_h_Z_pT_cross_section->fill(Zmom.pT());
_h_Z_pT_normalised->fill(Zmom.pT());
_h_Z_y_cross_section->fill(Zmom.absrap());
_h_Z_y_normalised->fill(Zmom.absrap());
_h_total_cross_section->fill(1960);
}
}
/// Finalize
void finalize() {
const double invlumi = crossSection()/sumOfWeights();
scale(_h_total_cross_section, invlumi);
scale(_h_jet_pT_cross_section, invlumi);
scale(_h_jet_y_cross_section, invlumi);
scale(_h_Z_pT_cross_section, invlumi);
scale(_h_Z_y_cross_section, invlumi);
double factor=1/dbl(*_sum_of_weights_inclusive);
if (_sum_of_weights_inclusive->val() == 0) factor = 0;
scale(_h_jet_pT_normalised, factor);
scale(_h_jet_y_normalised, factor);
scale(_h_Z_pT_normalised, factor);
scale(_h_Z_y_normalised, factor);
}
/// @}
private:
/// @name Histograms
/// @{
Histo1DPtr _h_jet_pT_cross_section;
Histo1DPtr _h_jet_y_cross_section;
Histo1DPtr _h_Z_pT_cross_section;
Histo1DPtr _h_Z_y_cross_section;
Histo1DPtr _h_total_cross_section;
Histo1DPtr _h_jet_pT_normalised;
Histo1DPtr _h_jet_y_normalised;
Histo1DPtr _h_Z_pT_normalised;
Histo1DPtr _h_Z_y_normalised;
/// @}
CounterPtr _sum_of_weights_inclusive;
};
RIVET_DECLARE_ALIASED_PLUGIN(D0_2008_S7863608, D0_2008_I792812);
}
|