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 VENUS_1999_I500179 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(VENUS_1999_I500179);
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, 1, 1, 1);
26    }
27
28
29    /// Perform the per-event analysis
30    void analyze(const Event& event) {
31      const FinalState& fs = apply<FinalState>(event, "FS");
32
33      map<long,int> nCount;
34      int ntotal(0);
35      for (const Particle& p : fs.particles()) {
36        nCount[p.pid()] += 1;
37        ++ntotal;
38      }
39      if (nCount[-13]==1 and nCount[13]==1 && ntotal==2+nCount[22]) {
40        vetoEvent; // mu+mu- + photons
41      }
42      else {
43        _c_hadrons->fill(Ecm); // everything else
44      }
45    }
46
47
48    /// Normalise histograms etc., after the run
49    void finalize() {
50      const double fact = crossSection()/sumOfWeights()/picobarn;
51      scale(_c_hadrons, fact);
52    }
53
54    /// @}
55
56
57    /// @name Histograms
58    /// @{
59    BinnedHistoPtr<string> _c_hadrons;
60    const string Ecm = "57.77";
61    /// @}
62
63
64  };
65
66
67  RIVET_DECLARE_PLUGIN(VENUS_1999_I500179);
68
69
70}