D0_2009_S8320160.cc

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// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Tools/Logging.hh"
#include "Rivet/Tools/BinnedHistogram.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/RivetAIDA.hh"

namespace Rivet {


  class D0_2009_S8320160 : public Analysis {

  public:

    /// @name Construction
    //@{

    /// Constructor
    D0_2009_S8320160() : Analysis("D0_2009_S8320160")
    {
      setBeams(PROTON, ANTIPROTON);
    }
 
    //@}


    /// @name Analysis methods
    //@{
 
    // Book histograms
    void init() {
      FinalState fs;
      FastJets conefinder(fs, FastJets::D0ILCONE, 0.7);
      addProjection(conefinder, "ConeFinder");

      _h_chi_dijet.addHistogram(250., 300., bookHistogram1D(1, 1, 1));
      _h_chi_dijet.addHistogram(300., 400., bookHistogram1D(2, 1, 1));
      _h_chi_dijet.addHistogram(400., 500., bookHistogram1D(3, 1, 1));
      _h_chi_dijet.addHistogram(500., 600., bookHistogram1D(4, 1, 1));
      _h_chi_dijet.addHistogram(600., 700., bookHistogram1D(5, 1, 1));
      _h_chi_dijet.addHistogram(700., 800., bookHistogram1D(6, 1, 1));
      _h_chi_dijet.addHistogram(800., 900., bookHistogram1D(7, 1, 1));
      _h_chi_dijet.addHistogram(900., 1000., bookHistogram1D(8, 1, 1));
      _h_chi_dijet.addHistogram(1000., 1100., bookHistogram1D(9, 1, 1));
      _h_chi_dijet.addHistogram(1100., 1960, bookHistogram1D(10, 1, 1));
    }
 
 
 
    /// Do the analysis
    void analyze(const Event & e) {
      const double weight = e.weight();
   
      const Jets& jets = applyProjection<JetAlg>(e, "ConeFinder").jetsByPt();
      if (jets.size() < 2) vetoEvent;
 
      FourMomentum j0(jets[0].momentum());
      FourMomentum j1(jets[1].momentum());
      double y0 = j0.rapidity();
      double y1 = j1.rapidity();
   
      if (fabs(y0+y1)>2) vetoEvent;
   
      double mjj = FourMomentum(j0+j1).mass();
      double chi = exp(fabs(y0-y1));
      _h_chi_dijet.fill(mjj, chi, weight);
    }
 
 
 
    /// Finalize
    void finalize() {
      foreach (AIDA::IHistogram1D* hist, _h_chi_dijet.getHistograms()) {
        normalize(hist);
      }
    }

    //@}
 
 
  private:
 
    /// @name Histograms
    //@{
    BinnedHistogram<double> _h_chi_dijet;
    //@}
 
  };



  // This global object acts as a hook for the plugin system
  AnalysisBuilder<D0_2009_S8320160> plugin_D0_2009_S8320160;

}