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_2007_I723333 : public Analysis {
 11  public:
 12
 13    /// Constructor
 14    RIVET_DEFAULT_ANALYSIS_CTOR(BELLE_2007_I723333);
 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      declare(UnstableParticles(), "UFS");
 26      book(_nDSS, "/TMP/nDSS");
 27      book(_nDS, "/TMP/nDS");
 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()]-=1;
 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
 45      map<long,int> nCount;
 46      int ntotal(0);
 47      for (const Particle& p : fs.particles()) {
 48	nCount[p.pid()] += 1;
 49	++ntotal;
 50      }
 51      const FinalState& ufs = apply<FinalState>(event, "UFS");
 52
 53      for(unsigned int ix=0;ix<ufs.particles().size();++ix) {
 54	const Particle& p1 = ufs.particles()[ix];
 55	if(abs(p1.pid())!=413) continue;
 56	map<long,int> nRes = nCount;
 57	int ncount = ntotal;
 58	findChildren(p1,nRes,ncount);
 59	bool matched=false;
 60	int sign = -p1.pid()/abs(p1.pid());
 61	for(unsigned int iy=0;iy<ufs.particles().size();++iy) {
 62	  if(ix==iy) continue;
 63	  const Particle& p2 = ufs.particles()[iy];
 64	  if(!p2.parents().empty() && p2.parents()[0].pid()==p1.pid())
 65	    continue;
 66	  if(p2.pid()!=sign*413 && p2.pid()!=sign*411) continue;
 67	  map<long,int> nRes2 = nRes;
 68	  int ncount2 = ncount;
 69	  findChildren(p2,nRes2,ncount2);
 70	  if(ncount2!=0) continue;
 71	  matched=true;
 72	  for(auto const & val : nRes2) {
 73	    if(val.second!=0) {
 74	      matched = false;
 75	      break;
 76	    }
 77	  }
 78	  if(matched) {
 79	    sign = abs(p2.pid());
 80	    break;
 81	  }
 82	}
 83	if(matched) {
 84	  if(sign==411)
 85	    _nDS->fill();
 86	  else if(sign==413)
 87	    _nDSS->fill();
 88	}
 89      }
 90    }
 91
 92
 93    /// Normalise histograms etc., after the run
 94    void finalize() {
 95      for(unsigned int ix=1;ix<3;++ix) {
 96        double sigma,error;
 97        if(ix==1) {
 98          sigma = _nDSS->val();
 99          error = _nDSS->err();
100        }
101        else {
102          sigma = _nDS->val();
103          error = _nDS->err();
104        }
105        sigma *= crossSection()/ sumOfWeights() /nanobarn;
106        error *= crossSection()/ sumOfWeights() /nanobarn;
107        Estimate1DPtr  mult;
108        book(mult, ix, 1, 1);
109        for (auto& b : mult->bins()) {
110          if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
111            b.set(sigma, error);
112          }
113        }
114      }
115    }
116
117    /// @}
118
119
120    /// @name Histograms
121    /// @{
122    CounterPtr _nDSS,_nDS;
123    /// @}
124
125
126  };
127
128
129  RIVET_DECLARE_PLUGIN(BELLE_2007_I723333);
130
131
132}