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 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(), "UFS");
 24      book(_nUps2pipi, "TMP/nUps2pipi");
 25      book(_nUps3pipi, "TMP/nUps3pipi");
 26    }
 27
 28    void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
 29      for (const Particle &child : p.children()) {
 30	if(child.children().empty()) {
 31	  --nRes[child.pid()];
 32	  --ncount;
 33	}
 34	else
 35	  findChildren(child,nRes,ncount);
 36      }
 37    }
 38
 39    /// Perform the per-event analysis
 40    void analyze(const Event& event) {
 41      const FinalState& fs = apply<FinalState>(event, "FS");
 42      map<long,int> nCount;
 43      int ntotal(0);
 44      for (const Particle& p : fs.particles()) {
 45	nCount[p.pid()] += 1;
 46	++ntotal;
 47      }
 48      const FinalState& ufs = apply<FinalState>(event, "UFS");
 49      for (const Particle& p : ufs.particles()) {
 50	if(p.children().empty()) continue;
 51	if(p.pid() != 100553 &&
 52	   p.pid() != 200553 ) continue;
 53	map<long,int> nRes = nCount;
 54	int ncount = ntotal;
 55	findChildren(p,nRes,ncount);
 56	if(ncount!=2) continue;
 57	bool matched = true;
 58	for(auto const & val : nRes) {
 59	  if(abs(val.first)==211) {
 60	    if(val.second!=1) {
 61	      matched = false;
 62	      break;
 63	    }
 64	  }
 65	  else if(val.second!=0) {
 66	    matched = false;
 67	    break;
 68	  }
 69	}
 70	if(matched) {
 71	  if(p.pid()==100553)
 72	    _nUps2pipi->fill();
 73	  if(p.pid()==200553)
 74	    _nUps3pipi->fill();
 75	}
 76      }
 77    }
 78
 79
 80    /// Normalise histograms etc., after the run
 81    void finalize() {
 82      double fact = crossSection()/ sumOfWeights() /picobarn;
 83      for(unsigned int ix=1;ix<3;++ix) {
 84        double sigma = 0.0,error = 0.0;
 85        if(ix==1) {
 86          sigma = _nUps3pipi->val()*fact;
 87          error = _nUps3pipi->err()*fact;
 88        }
 89        else if(ix==2) {
 90          sigma = _nUps2pipi->val()*fact;
 91          error = _nUps2pipi->err()*fact;
 92        }
 93        Estimate1DPtr mult;
 94        book(mult, 1, 1, ix);
 95        for (auto& b : mult->bins()) {
 96          if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
 97            b.set(sigma, error);
 98          }
 99        }
100      }
101    }
102    /// @}
103
104    /// @name Histograms
105    /// @{
106    CounterPtr _nUps2pipi,_nUps3pipi;
107    /// @}
108
109  };
110
111
112  RIVET_DECLARE_PLUGIN(CLEO_1999_I474676);
113
114
115}