1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief e+e- > K+K-pi+pi-
 9  class DM1_1982_I169382 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(DM1_1982_I169382);
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      book(_cKpKmpippim, "TMP/KpKmpippim",refData(1,1,1));
24    }
25
26
27    /// Perform the per-event analysis
28    void analyze(const Event& event) {
29      const FinalState& fs = apply<FinalState>(event, "FS");
30
31      map<long,int> nCount;
32      int ntotal(0);
33      for (const Particle& p : fs.particles()) {
34	nCount[p.pid()] += 1;
35	++ntotal;
36      }
37
38      if(ntotal!=4) vetoEvent;
39      if(nCount[321]==1 && nCount[-321]==1 && nCount[211]==1 && nCount[-211]==1)
40	_cKpKmpippim->fill(sqrtS()/GeV);
41    }
42
43
44    /// Normalise histograms etc., after the run
45    void finalize() {
46      scale(_cKpKmpippim, crossSection()/ sumOfWeights() /nanobarn);
47      Estimate1DPtr mult;
48      book(mult, 1, 1, 1);
49      barchart(_cKpKmpippim,mult);
50    }
51
52    /// @}
53
54
55    /// @name Histograms
56    /// @{
57    Histo1DPtr _cKpKmpippim;
58    /// @}
59
60
61  };
62
63
64  RIVET_DECLARE_PLUGIN(DM1_1982_I169382);
65
66
67}