1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4
  5namespace Rivet {
  6
  7
  8  /// @brief R and hadron mult in e+e-
  9  class GAMMAGAMMA_1979_I141722 : public Analysis {
 10  public:
 11
 12    /// Constructor
 13    RIVET_DEFAULT_ANALYSIS_CTOR(GAMMAGAMMA_1979_I141722);
 14
 15
 16    /// @name Analysis methods
 17    /// @{
 18
 19    /// Book histograms and initialise projections before the run
 20    void init() {
 21      // Initialise and register projections
 22      declare(FinalState(), "FS");
 23
 24      // Book histograms
 25      book(_c_hadrons, "/TMP/sigma_hadrons", refData<YODA::BinnedEstimate<string>>(1,1,1));
 26      book(_c_muons  , "/TMP/sigma_muons"  , refData<YODA::BinnedEstimate<string>>(1,1,1));
 27      book(_c_charged, 2, 1, 1);
 28      book(_c_neutral, 2, 1, 2);
 29      for (const string& en : _c_hadrons.binning().edges<0>()) {
 30        const size_t idx = en.find("-");
 31        if(idx!=std::string::npos) {
 32          const double emin = std::stod(en.substr(0,idx));
 33          const double emax = std::stod(en.substr(idx+1,string::npos));
 34          if(inRange(sqrtS()/GeV, emin, emax)) {
 35            _ecms = en;
 36            break;
 37          }
 38        }
 39        else {
 40          const double end = std::stod(en)*GeV;
 41          if (isCompatibleWithSqrtS(end)) {
 42            _ecms = en;
 43            break;
 44          }
 45        }
 46      }
 47      if(_ecms.empty()) MSG_ERROR("Beam energy incompatible with analysis.");
 48    }
 49
 50
 51    /// Perform the per-event analysis
 52    void analyze(const Event& event) {
 53      const FinalState& fs = apply<FinalState>(event, "FS");
 54
 55      map<long,int> nCount;
 56      int ntotal(0),ncharged(0),nneutral(0);
 57      for (const Particle& p : fs.particles()) {
 58	nCount[p.pid()] += 1;
 59	++ntotal;
 60	if(PID::isCharged(p.pid()))
 61	  ncharged += 1;
 62	else
 63	  nneutral += 1;
 64      }
 65      // mu+mu- + photons
 66      if(nCount[-13]==1 and nCount[13]==1 &&
 67	 ntotal==2+nCount[22])
 68	_c_muons->fill(_ecms);
 69      // everything else
 70      else {
 71	if(ntotal==2) vetoEvent;
 72	_c_hadrons->fill(_ecms);
 73	_c_charged->fill(sqrtS()/GeV,ncharged);
 74	_c_neutral->fill(sqrtS()/GeV,nneutral);
 75      }
 76    }
 77
 78
 79    /// Normalise histograms etc., after the run
 80    void finalize() {
 81      BinnedEstimatePtr<string> ratio;
 82      book(ratio,1,1,1);
 83      divide(_c_hadrons,_c_muons,ratio);
 84    }
 85
 86    /// @}
 87
 88
 89    /// @name Histograms
 90    /// @{
 91    BinnedHistoPtr<string> _c_hadrons, _c_muons;
 92    Profile1DPtr _c_neutral,_c_charged;
 93    string _ecms;
 94    /// @}
 95
 96
 97  };
 98
 99
100  RIVET_DECLARE_PLUGIN(GAMMAGAMMA_1979_I141722);
101
102
103}