1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5
 6namespace Rivet {
 7
 8
 9  /// @brief e+ e- > KS0 KL0
10  class CMD2_1999_I502164 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(CMD2_1999_I502164);
15
16
17    /// @name Analysis methods
18    /// @{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22      declare(FinalState(), "FS");
23      for(unsigned int ix=0;ix<4;++ix)
24        book(_sigma[ix], "TMP/sigma_"+toString(ix), refData(1+ix, 1, 1));
25
26    }
27
28
29    /// Perform the per-event analysis
30    void analyze(const Event& event) {
31
32      const FinalState& fs = apply<FinalState>(event, "FS");
33
34      map<long,int> nCount;
35      int ntotal(0);
36      for (const Particle& p : fs.particles()) {
37	nCount[p.pid()] += 1;
38	++ntotal;
39      }
40      if(ntotal==2 &&
41	 nCount[130]==1 && nCount[310]==1) {
42	for(unsigned int ix=0;ix<4;++ix) _sigma[ix]->fill(sqrtS()/MeV);
43      }
44    }
45
46
47    /// Normalise histograms etc., after the run
48    void finalize() {
49      double fact = crossSection()/ sumOfWeights() /nanobarn;
50      for(unsigned int ix=0;ix<4;++ix) {
51        scale(_sigma[ix],fact);
52        Estimate1DPtr tmp;
53        book(tmp, 1+ix, 1, 1);
54        barchart(_sigma[ix],tmp);
55      }
56    }
57
58    /// @}
59
60
61    /// @name Histograms
62    /// @{
63    Histo1DPtr _sigma[4];
64    /// @}
65
66
67  };
68
69
70  RIVET_DECLARE_PLUGIN(CMD2_1999_I502164);
71
72
73}