1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief D* +/- production at 29 GeV
 9  class MARKII_1982_I177606 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1982_I177606);
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(UnstableParticles(), "UFS");
23      //Histograms
24      book(_h_spect[0],2,1,1);
25      book(_h_spect[1],3,1,1);
26      _axis = YODA::Axis<double>(4, 0.2, 1.0);
27    }
28
29
30    /// Perform the per-event analysis
31    void analyze(const Event& event) {
32      if (_edges.empty())  _edges = _h_spect[0]->xEdges();
33      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
34      for (const Particle& p : ufs.particles(Cuts::abspid==413)) {
35        const double xp = 2.*p.E()/sqrtS();
36        const double beta = p.p3().mod() / p.E();
37        _h_spect[0]->fill(map2string(xp), 1./beta);
38        _h_spect[1]->fill(map2string(xp), 1./beta);
39      }
40    }
41
42
43    /// Normalise histograms etc., after the run
44    void finalize() {
45      for(unsigned int ix=0;ix<2;++ix) {
46        scale(_h_spect[ix], sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
47        for(auto & b : _h_spect[ix]->bins())
48          b.scaleW(1./_axis.width(b.index()));
49      }
50    }
51
52    ///@}
53
54    string map2string(const double value) const {
55      const size_t idx = _axis.index(value);
56      if (idx && idx <= _edges.size())  return _edges[idx-1];
57      return "OTHER";
58    }
59
60
61    /// @name Histograms
62    ///@{
63    BinnedHistoPtr<string> _h_spect[2];
64    vector<string> _edges;
65    YODA::Axis<double> _axis;
66    ///@}
67
68
69  };
70
71
72  RIVET_DECLARE_PLUGIN(MARKII_1982_I177606);
73
74}