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 e+ e- > Upsilon(2,3S) gamma at 10.52 and 10.58
 10  class CLEO_1999_I474676 : public Analysis {
 11  public:
 12
 13    /// Constructor
 14    RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_1999_I474676);
 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(Cuts::pid==100553 ||
 24                                Cuts::pid==200553), "UFS");
 25      book(_nUps2pipi, 1,1,2);
 26      book(_nUps3pipi, 1,1,1);
 27      for (const string& en : _nUps2pipi.binning().edges<0>()) {
 28        const double end = std::stod(en)*GeV;
 29        if (isCompatibleWithSqrtS(end)) {
 30          _ecms = en;
 31          break;
 32        }
 33      }
 34      if(_ecms.empty()) MSG_ERROR("Beam energy incompatible with analysis.");
 35    }
 36
 37    void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
 38      for (const Particle &child : p.children()) {
 39	if(child.children().empty()) {
 40	  --nRes[child.pid()];
 41	  --ncount;
 42	}
 43	else
 44	  findChildren(child,nRes,ncount);
 45      }
 46    }
 47
 48    /// Perform the per-event analysis
 49    void analyze(const Event& event) {
 50      const FinalState& fs = apply<FinalState>(event, "FS");
 51      map<long,int> nCount;
 52      int ntotal(0);
 53      for (const Particle& p : fs.particles()) {
 54	nCount[p.pid()] += 1;
 55	++ntotal;
 56      }
 57      const FinalState& ufs = apply<FinalState>(event, "UFS");
 58      for (const Particle& p : ufs.particles()) {
 59	if(p.children().empty()) continue;
 60	map<long,int> nRes = nCount;
 61	int ncount = ntotal;
 62	findChildren(p,nRes,ncount);
 63	if(ncount!=1) continue;
 64	bool matched = true;
 65	for(auto const & val : nRes) {
 66	  if(val.first==22) {
 67	    if(val.second!=1) {
 68	      matched = false;
 69	      break;
 70	    }
 71	  }
 72	  else if(val.second!=0) {
 73	    matched = false;
 74	    break;
 75	  }
 76	}
 77	if(matched) {
 78	  if(p.pid()==100553)
 79	    _nUps2pipi->fill(_ecms);
 80	  else if(p.pid()==200553)
 81	    _nUps3pipi->fill(_ecms);
 82	}
 83      }
 84    }
 85
 86
 87    /// Normalise histograms etc., after the run
 88    void finalize() {
 89      double fact = crossSection()/ sumOfWeights() /picobarn;
 90      scale(_nUps3pipi,fact);
 91      scale(_nUps2pipi,fact);
 92    }
 93    /// @}
 94
 95    /// @name Histograms
 96    /// @{
 97    BinnedHistoPtr<string> _nUps2pipi,_nUps3pipi;
 98    string _ecms;
 99    /// @}
100
101  };
102
103
104  RIVET_DECLARE_PLUGIN(CLEO_1999_I474676);
105
106
107}