CDF_2008_S8093652.cc

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

namespace Rivet {

  class CDF_2008_S8093652 : public Analysis {

  public:

    /// Constructor
    CDF_2008_S8093652()
      : Analysis("CDF_2008_S8093652")
    {
      setBeams(PROTON, ANTIPROTON);
      setNeedsCrossSection(true);
    }


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

      _h_m_dijet = bookHistogram1D(1, 1, 1);
    }
 

    /// Do the analysis
    void analyze(const Event & e) {
      const double weight = e.weight();
   
      const JetAlg& jetpro = applyProjection<JetAlg>(e, "ConeFinder");
      const Jets& jets = jetpro.jetsByPt();
   
      if (jets.size() < 2) vetoEvent;
   
      const FourMomentum j0(jets[0].momentum());
      const FourMomentum j1(jets[1].momentum());
      if (fabs(j1.rapidity()) > 1.0 || fabs(j0.rapidity()) > 1.0) {
        vetoEvent;
      }
 
      double mjj = FourMomentum(j0+j1).mass();
      _h_m_dijet->fill(mjj, weight);
    }
 
 
    /// Finalize
    void finalize() {
      scale(_h_m_dijet, crossSection()/sumOfWeights());
    }
    //@}


  private:

    /// @name Histograms
    //@{
    AIDA::IHistogram1D* _h_m_dijet;
    //@}
 
  };


  // This global object acts as a hook for the plugin system
  AnalysisBuilder<CDF_2008_S8093652> plugin_CDF_2008_S8093652;

}