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      Scatter2D temphisto(refData(1, 1, 6));
53      Scatter2DPtr mult;
54      book(mult, 1, 1, 6);
55      for (size_t b = 0; b < temphisto.numPoints(); b++) {
56	const double x  = temphisto.point(b).x();
57	pair<double,double> ex = temphisto.point(b).xErrs();
58	pair<double,double> ex2 = ex;
59	if(ex2.first ==0.) ex2. first=0.0001;
60	if(ex2.second==0.) ex2.second=0.0001;
61	if (inRange(sqrtS()/MeV, x-ex2.first, x+ex2.second)) {
62	  mult->addPoint(x, sigma, ex, make_pair(error,error));
63	}
64	else {
65	  mult->addPoint(x, 0., ex, make_pair(0.,.0));
66	}
67      }
68    }
69
70    //@}
71
72
73    /// @name Histograms
74    //@{
75    CounterPtr _nK0K0;
76    //@}
77
78
79  };
80
81
82  // The hook for the plugin system
83  RIVET_DECLARE_PLUGIN(CMD3_2016_I1444990);
84
85
86}