1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4
  5namespace Rivet {
  6
  7
  8  /// @brief R measurement 
  9  class MARKI_1975_I100733 : public Analysis {
 10  public:
 11
 12    /// Constructor
 13    RIVET_DEFAULT_ANALYSIS_CTOR(MARKI_1975_I100733);
 14
 15
 16    /// @name Analysis methods
 17    /// @{
 18
 19    /// Book histograms and initialise projections before the run
 20    void init() {
 21
 22      declare(FinalState(), "FS");
 23      // Book histograms
 24      for(unsigned int ix=0;ix<2;++ix) {
 25        if(ix==0) {
 26          book(_c_hadrons[ix], 1+ix,1,1);
 27        }
 28        else {
 29          book(_c_hadrons[ix], "/TMP/sigma_hadrons_"+toString(ix), refData<YODA::BinnedEstimate<string>>(1+ix,1,1));
 30          book(_c_muons,   "/TMP/sigma_muons_"  +toString(ix), refData<YODA::BinnedEstimate<string>>(1+ix,1,1));
 31        }
 32        for (const string& en : _c_hadrons[ix].binning().edges<0>()) {
 33          const size_t idx = en.find("-");
 34          if(idx!=std::string::npos) {
 35            const double emin = std::stod(en.substr(0,idx));
 36            const double emax = std::stod(en.substr(idx+1,string::npos));
 37            if(inRange(sqrtS()/GeV, emin, emax)) {
 38              _ecms[ix] = en;
 39              break;
 40            }
 41          }
 42          else {
 43            const double end = std::stod(en)*GeV;
 44            if (isCompatibleWithSqrtS(end)) {
 45              _ecms[ix] = en;
 46              break;
 47            }
 48          }
 49        }
 50      }
 51      if (isCompatibleWithSqrtS(3*GeV)) {
 52      	book(_h_charged, 3, 1, 1);
 53      }
 54      else if (isCompatibleWithSqrtS(4.8*GeV)) {
 55        book(_h_charged, 3, 1, 2);
 56      }
 57      else if (isCompatibleWithSqrtS(7.4*GeV)) {
 58        book(_h_charged, 3, 1, 3);
 59      }
 60      if(_ecms[0].empty() &&_ecms[1].empty())
 61        MSG_ERROR("Beam energy incompatible with analysis.");
 62    }
 63
 64
 65    /// Perform the per-event analysis
 66    void analyze(const Event& event) {
 67      const FinalState& fs = apply<FinalState>(event, "FS");
 68
 69      map<long,int> nCount;
 70      int ntotal(0);
 71      for (const Particle& p : fs.particles()) {
 72      	nCount[p.pid()] += 1;
 73      	++ntotal;
 74      }
 75      if (nCount[-13]==1 and nCount[13]==1 && ntotal==2+nCount[22]) {
 76      	_c_muons->fill(_ecms[1]); // mu+mu- + photons
 77      }
 78      // everything else
 79      else {
 80	for(unsigned int ix=0;ix<2;++ix) _c_hadrons[ix]->fill(_ecms[ix]);
 81        if(_h_charged) {
 82          if(_edges.empty()) _edges = _h_charged->xEdges();
 83          for (const Particle& p : fs.particles()) {
 84            if(PID::isCharged(p.pid())) {
 85              double x = 2.*p.p3().mod()/sqrtS();
 86              const size_t idx = _axis.index(x);
 87              if(idx && idx <=_edges.size())
 88                _h_charged->fill(_edges[idx-1]);
 89            }
 90          }
 91        }
 92      }
 93    }
 94
 95
 96    /// Normalise histograms etc., after the run
 97    void finalize() {
 98      if (_h_charged) {
 99      	scale(_h_charged, crossSection()/ sumOfWeights() /microbarn*sqr(sqrtS()));
100        for(auto & b : _h_charged->bins()) {
101          const size_t idx = b.index();
102          b.scaleW(1./_axis.width(idx));
103        }
104      }
105      const double fact = crossSection()/ sumOfWeights() /nanobarn;
106      scale(_c_hadrons[0], fact);
107      BinnedEstimatePtr<string> mult;
108      book(mult,2,1,1);
109      divide(_c_hadrons[1],_c_muons,mult);
110    }
111
112    /// @}
113
114
115    /// @name Histograms
116    /// @{
117    BinnedHistoPtr<string> _c_hadrons[2], _c_muons;
118    string _ecms[2];
119    BinnedHistoPtr<string> _h_charged;
120    vector<string> _edges;
121    YODA::Axis<double> _axis{0.,0.10,0.12,0.14,0.16,0.18,0.20,0.22,0.24,0.26,0.28,0.30,
122        0.32,0.34,0.36,0.38,0.40,0.44,0.48,0.52,0.56,0.64,0.72,0.80,0.88};
123    /// @}
124
125
126  };
127
128
129  RIVET_DECLARE_PLUGIN(MARKI_1975_I100733);
130
131
132}