1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief e+e- -> KS0 K+- pi-+
 9  class DM1_1982_I176801 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(DM1_1982_I176801);
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(_nKKpi, "/TMP/nKKpi", refData(1,1,1));
24
25    }
26
27
28    /// Perform the per-event analysis
29    void analyze(const Event& event) {
30      const FinalState& fs = apply<FinalState>(event, "FS");
31
32      map<long,int> nCount;
33      int ntotal(0);
34      for (const Particle& p : fs.particles()) {
35	nCount[p.pid()] += 1;
36	++ntotal;
37      }
38      if(ntotal!=3) vetoEvent;
39      if(nCount[310]==1 &&
40	 ((nCount[ 211]==1&&nCount[-321]==1)||
41	  (nCount[-211]==1&&nCount[ 321]==1)))
42	_nKKpi->fill(sqrtS()/MeV);
43    }
44
45
46    /// Normalise histograms etc., after the run
47    void finalize() {
48      scale(_nKKpi, crossSection()/ sumOfWeights() /nanobarn);
49      Estimate1DPtr mult;
50      book(mult, 1, 1, 1);
51      barchart(_nKKpi,mult);
52    }
53
54    /// @}
55
56
57    /// @name Histograms
58    /// @{
59    Histo1DPtr _nKKpi;
60    /// @}
61
62
63  };
64
65
66  RIVET_DECLARE_PLUGIN(DM1_1982_I176801);
67
68
69}