1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5
 6namespace Rivet {
 7
 8
 9  /// @brief Add a short analysis description here
10  class CMD3_2016_I1444990 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(CMD3_2016_I1444990);
15
16
17    /// @name Analysis methods
18    /// @{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22
23      declare(FinalState(), "FS");
24      book(_nK0K0, "TMP/K0K0");
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	_nK0K0->fill();
43    }
44
45
46    /// Normalise histograms etc., after the run
47    void finalize() {
48      double sigma = _nK0K0->val();
49      double error = _nK0K0->err();
50      sigma *= crossSection()/ sumOfWeights() /nanobarn;
51      error *= crossSection()/ sumOfWeights() /nanobarn;
52      Estimate1DPtr mult;
53      book(mult, 1, 1, 6);
54      for (auto& b : mult->bins()) {
55        if (inRange(sqrtS()/MeV, b.xMin(), b.xMax())) {
56          b.set(sigma, error);
57        }
58      }
59    }
60
61    /// @}
62
63
64    /// @name Histograms
65    /// @{
66    CounterPtr _nK0K0;
67    /// @}
68
69
70  };
71
72
73  RIVET_DECLARE_PLUGIN(CMD3_2016_I1444990);
74
75
76}