1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Hadronic cross section at 3.773
 9  class CLEO_2006_I1650066 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_2006_I1650066);
14
15
16    /// @name Analysis methods
17    /// @{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21      declare(FinalState(), "FS");
22      book(_c_hadrons, 1,1,1);
23      for (const string& en : _c_hadrons.binning().edges<0>()) {
24        double end = std::stod(en)*GeV;
25        if(isCompatibleWithSqrtS(end)) {
26          _ecms = en;
27          break;
28        }
29      }
30      if(_ecms.empty())
31        MSG_ERROR("Beam energy incompatible with analysis.");
32    }
33
34
35    /// Perform the per-event analysis
36    void analyze(const Event& event) {
37      const FinalState& fs = apply<FinalState>(event, "FS");
38
39      map<long,int> nCount;
40      int ntotal(0);
41      for (const Particle& p : fs.particles()) {
42        nCount[p.pid()] += 1;
43        ++ntotal;
44      }
45      // mu+mu- + photons
46      if(nCount[-13]==1 and nCount[13]==1 &&
47         ntotal==2+nCount[22])
48        vetoEvent;
49      // everything else
50      else {
51        _c_hadrons->fill(_ecms);
52      }
53    }
54
55
56    /// Normalise histograms etc., after the run
57    void finalize() {
58      scale(_c_hadrons,crossSection()/ sumOfWeights() /nanobarn);
59    }
60
61    /// @}
62
63
64    /// @name Histograms
65    /// @{
66    BinnedHistoPtr<string> _c_hadrons;
67    string _ecms;
68    /// @}
69
70
71  };
72
73
74  RIVET_DECLARE_PLUGIN(CLEO_2006_I1650066);
75
76
77}