1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4
  5
  6namespace Rivet {
  7
  8
  9  /// @brief Add a short analysis description here
 10  class SND_2001_I533574 : public Analysis {
 11  public:
 12
 13    /// Constructor
 14    RIVET_DEFAULT_ANALYSIS_CTOR(SND_2001_I533574);
 15
 16
 17    /// @name Analysis methods
 18    /// @{
 19
 20    /// Book histograms and initialise projections before the run
 21    void init() {
 22
 23      // Initialise and register projections
 24      declare(FinalState(), "FS");
 25      book(_nKpKm, "TMP/KpKm");
 26      book(_nK0K0, "TMP/K0K0");
 27      book(_n3pi, "TMP/3pi");
 28    }
 29
 30
 31    /// Perform the per-event analysis
 32    void analyze(const Event& event) {
 33      const FinalState& fs = apply<FinalState>(event, "FS");
 34
 35      map<long,int> nCount;
 36      int ntotal(0);
 37      for (const Particle& p : fs.particles()) {
 38	nCount[p.pid()] += 1;
 39	++ntotal;
 40      }
 41      if(ntotal==2) {
 42	if(nCount[321]==1 && nCount[-321]==1)
 43	  _nKpKm->fill();
 44	else if(nCount[130]==1 && nCount[310]==1)
 45	  _nK0K0->fill();
 46      }
 47      else if(ntotal==3 && nCount[211] == 1 && nCount[-211] == 1 && nCount[111] == 1)
 48	_n3pi->fill();
 49
 50    }
 51
 52
 53    /// Normalise histograms etc., after the run
 54    void finalize() {
 55      for (unsigned int iy=1;iy<3;++iy) {
 56        for (unsigned int ix=1;ix<5;++ix) {
 57          double sigma = 0., error = 0.;
 58          if(ix==1) {
 59            sigma = _nKpKm->val();
 60            error = _nKpKm->err();
 61          }
 62          else if(ix==2) {
 63            sigma = _nK0K0->val();
 64            error = _nK0K0->err();
 65          }
 66          else if(ix==3) {
 67            sigma = _nK0K0->val();
 68            error = _nK0K0->err();
 69          }
 70          else if(ix==4) {
 71            sigma = _n3pi->val();
 72            error = _n3pi->err();
 73          }
 74          sigma *= crossSection()/ sumOfWeights() /nanobarn;
 75          error *= crossSection()/ sumOfWeights() /nanobarn;
 76          Estimate1DPtr mult;
 77          book(mult, iy, 1, ix);
 78          for (auto& b : mult->bins()) {
 79            if (inRange(sqrtS()/MeV, b.xMin(), b.xMax())) {
 80              b.set(sigma, error);
 81            }
 82          }
 83        }
 84      }
 85    }
 86
 87    /// @}
 88
 89
 90    /// @name Histograms
 91    /// @{
 92    CounterPtr _nKpKm,_nK0K0,_n3pi;
 93    /// @}
 94
 95
 96  };
 97
 98
 99  RIVET_DECLARE_PLUGIN(SND_2001_I533574);
100
101
102}