1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4#include "Rivet/Projections/UnstableParticles.hh"
  5#include "Rivet/Projections/ChargedFinalState.hh"
  6
  7namespace Rivet {
  8
  9
 10  /// @brief e+ e- > hadrons
 11  class BESII_2006_I717720 : public Analysis {
 12  public:
 13
 14    /// Constructor
 15    RIVET_DEFAULT_ANALYSIS_CTOR(BESII_2006_I717720);
 16
 17
 18    /// @name Analysis methods
 19    /// @{
 20
 21    /// Book histograms and initialise projections before the run
 22    void init() {
 23      // Initialise and register projections
 24      declare(UnstableParticles(Cuts::abspid==411 ||
 25				Cuts::abspid==421 ), "UFS");
 26      declare(FinalState(), "FS");
 27
 28      // Book histograms
 29      book(_sigma[0], 1,1,1);
 30      for(unsigned int ix=1;ix<4;++ix)
 31	book(_sigma[ix], 2,1,ix);
 32      string eCent = getOption<string>("ECENT", std::to_string(sqrtS()/GeV));
 33      double ee = std::stod(eCent);
 34      for(unsigned int ix=0;ix<3;++ix) {
 35        for(const auto & en : _sigma[ix].binning().edges<0>()) {
 36          if(fuzzyEquals(std::stod(en),ee,1e-5)) {
 37            _ecms[ix]=en;
 38            break;
 39          }
 40        }
 41      }
 42      if(_ecms[0].empty() && _ecms[1].empty() && _ecms[2].empty())
 43        MSG_ERROR("Beam energy incompatible with analysis.");
 44      _ecms[3]=_ecms[2];
 45    }
 46
 47
 48    /// Perform the per-event analysis
 49    void analyze(const Event& event) {
 50      const FinalState& fs = apply<FinalState>(event, "FS");
 51      const FinalState& ufs = apply<FinalState>(event, "UFS");
 52      map<long,int> nCount;
 53      int ntotal(0);
 54      for (const Particle& p : fs.particles()) {
 55      	nCount[p.pid()] += 1;
 56      	++ntotal;
 57      }
 58      // mu+mu- + photons
 59      if(nCount[-13]==1 and nCount[13]==1 && ntotal==2+nCount[22]) {
 60      	vetoEvent;
 61      }
 62      else if(nCount[-11]==1 and nCount[11]==1 && ntotal==2+nCount[22]) {
 63      	vetoEvent;
 64      }
 65      // everything else
 66      else {
 67      	if(!_ecms[0].empty()) _sigma[0]->fill(_ecms[0]);
 68	if(!ufs.particles().empty()) {
 69	  if(!_ecms[1].empty()) _sigma[1]->fill(_ecms[1]);
 70	  if(ufs.particles()[0].abspid()==421) {
 71	    if(!_ecms[2].empty()) _sigma[2]->fill(_ecms[2]);
 72          }
 73	  else {
 74	    if(!_ecms[3].empty()) _sigma[3]->fill(_ecms[3]);
 75          }
 76	}
 77      }
 78    }
 79
 80
 81    /// Normalise histograms etc., after the run
 82    void finalize() {
 83      double fact = crossSection()/sumOfWeights()/nanobarn;
 84      for(unsigned int ix=0;ix<4;++ix)
 85        scale(_sigma[ix],fact);
 86    }
 87
 88    /// @}
 89
 90    /// @name Histograms
 91    /// @{
 92    BinnedHistoPtr<string> _sigma[4];
 93    string _ecms[4];
 94    /// @}
 95
 96  };
 97
 98
 99  RIVET_DECLARE_PLUGIN(BESII_2006_I717720);
100
101}