1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Add a short analysis description here
 9  class CLEO_1998_I445351 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_1998_I445351);
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, "sigma_hadrons", refData<YODA::BinnedEstimate<string>>(1,1,1));
26      book(_c_muons, "sigma_muons", refData<YODA::BinnedEstimate<string>>(1,1,1));
27      book(_mult, 1,1,1);
28    }
29
30
31    /// Perform the per-event analysis
32    void analyze(const Event& event) {
33      const FinalState& fs = apply<FinalState>(event, "FS");
34
35      map<long,int> nCount;
36      int ntotal(0);
37      for (const Particle& p : fs.particles()) {
38        nCount[p.pid()] += 1;
39        ++ntotal;
40      }
41      // mu+mu- + photons
42      if(nCount[-13]==1 and nCount[13]==1 &&  ntotal==2+nCount[22]) {
43        _c_muons->fill(Ecm);
44      }
45      else  _c_hadrons->fill(Ecm); // everything else
46    }
47
48
49    /// Normalise histograms etc., after the run
50    void finalize() {
51      const double fact = crossSection()/ sumOfWeights() /picobarn;
52      scale({_c_hadrons, _c_muons}, fact);
53      divide(_c_hadrons, _c_muons, _mult);
54    }
55
56    /// @}
57
58
59    /// @name Histograms
60    /// @{
61    BinnedHistoPtr<string> _c_hadrons, _c_muons;
62    BinnedEstimatePtr<string> _mult;
63    const string Ecm = "10.52";
64    /// @}
65
66
67  };
68
69
70  RIVET_DECLARE_PLUGIN(CLEO_1998_I445351);
71
72
73}