1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4#include "Rivet/Projections/UnstableParticles.hh"
  5
  6namespace Rivet {
  7
  8
  9  /// @brief Add a short analysis description here
 10  class BELLE_2008_I764099 : public Analysis {
 11  public:
 12
 13    /// Constructor
 14    RIVET_DEFAULT_ANALYSIS_CTOR(BELLE_2008_I764099);
 15
 16
 17    /// @name Analysis methods
 18    /// @{
 19
 20    /// Book histograms and initialise projections before the run
 21    void init() {
 22      declare(FinalState(), "FS");
 23      declare(UnstableParticles(), "UFS");
 24      book(_nUps1pipi, 1, 1, 1);
 25      book(_nUps2pipi, 2, 1, 1);
 26      book(_nUps3pipi, 3, 1, 1);
 27      book(_nUps1KK,   4, 1, 1);
 28    }
 29
 30    void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
 31      for (const Particle &child : p.children()) {
 32	if(child.children().empty()) {
 33	  --nRes[child.pid()];
 34	  --ncount;
 35	}
 36	else
 37	  findChildren(child,nRes,ncount);
 38      }
 39    }
 40
 41    /// Perform the per-event analysis
 42    void analyze(const Event& event) {
 43      const FinalState& fs = apply<FinalState>(event, "FS");
 44      map<long,int> nCount;
 45      int ntotal(0);
 46      for (const Particle& p : fs.particles()) {
 47	nCount[p.pid()] += 1;
 48	++ntotal;
 49      }
 50      const FinalState& ufs = apply<FinalState>(event, "UFS");
 51      for (const Particle& p : ufs.particles()) {
 52	if(p.children().empty()) continue;
 53	if(p.pid() !=   553  &&
 54	   p.pid() != 100553 &&
 55	   p.pid() != 200553 ) continue;
 56	map<long,int> nRes = nCount;
 57	int ncount = ntotal;
 58	findChildren(p,nRes,ncount);
 59	if(ncount!=2) continue;
 60	bool matched = true;
 61	for(auto const & val : nRes) {
 62	  if(abs(val.first)==321 || abs(val.first)==211) {
 63	    continue;
 64	  }
 65	  else if(val.second!=0) {
 66	    matched = false;
 67	    break;
 68	  }
 69	}
 70	if(matched) {
 71	  if(nRes[211]==1 && nRes[-211]==1 ) {
 72	    if(p.pid()==553)
 73	      _nUps1pipi->fill("10.87"s);
 74	    if(p.pid()==100553)
 75	      _nUps2pipi->fill("10.87"s);
 76	    if(p.pid()==200553)
 77	      _nUps3pipi->fill("10.87"s);
 78	  }
 79	  else if(nRes[321]==1 && nRes[-321]==1) {
 80	    if(p.pid()==553)
 81	      _nUps1KK->fill("10.87"s);
 82	  }
 83	}
 84      }
 85    }
 86
 87
 88    /// Normalise histograms etc., after the run
 89    void finalize() {
 90      double fact = crossSection()/ sumOfWeights() /picobarn;
 91      scale(_nUps1pipi,fact);
 92      scale(_nUps2pipi,fact);
 93      scale(_nUps3pipi,fact);
 94      scale(_nUps1KK  ,fact);
 95    }
 96
 97    /// @}
 98
 99    /// @name Histograms
100    /// @{
101    BinnedHistoPtr<string> _nUps1pipi,_nUps2pipi,_nUps3pipi,_nUps1KK;
102    /// @}
103
104  };
105
106  RIVET_DECLARE_PLUGIN(BELLE_2008_I764099);
107
108}