1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/Beam.hh"
 4#include "Rivet/Projections/UnstableParticles.hh"
 5
 6namespace Rivet {
 7
 8
 9  /// @brief Xi_c' spectrum
10  class CLEOII_1999_I478217 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(CLEOII_1999_I478217);
15
16
17    /// @name Analysis methods
18    /// @{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22      // projections
23      declare(Beam(), "Beams");
24      declare(UnstableParticles(), "UFS");
25      // book histos
26      book(_h_Xi_c,1,1,1);
27      _axis = YODA::Axis<double>(5, 0.5, 1.0);
28    }
29
30
31    /// Perform the per-event analysis
32    void analyze(const Event& event) {
33      if (_edges.empty())  _edges = _h_Xi_c->xEdges();
34      // Get beams and average beam momentum
35      const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
36      const double Emax = ( beams.first.p3().mod() + beams.second.p3().mod() ) / 2.0;
37      const double Pmax = sqrt(sqr(Emax)-sqr(2.578));
38      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
39      for (const Particle& p : ufs.particles(Cuts::abspid==4312 or Cuts::abspid==4322)) {
40        double xp = p.momentum().p3().mod()/Pmax;
41        _h_Xi_c->fill(map2string(xp));
42      }
43    }
44
45    string map2string(const double value) const {
46      const size_t idx = _axis.index(value);
47      if (idx && idx <= _edges.size())  return _edges[idx-1];
48      return "OTHER";
49    }
50
51
52    /// Normalise histograms etc., after the run
53    void finalize() {
54      normalize(_h_Xi_c);
55      // bin width (0.1)
56      scale(_h_Xi_c,10.);
57    }
58
59    /// @}
60
61
62    /// @name Histograms
63    /// @{
64    BinnedHistoPtr<string> _h_Xi_c;
65    YODA::Axis<double> _axis;
66    vector<string> _edges;
67    /// @}
68
69
70  };
71
72
73  RIVET_DECLARE_PLUGIN(CLEOII_1999_I478217);
74
75}