1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Omega production at 29 GeV
 9  class MARKII_1987_I247900 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1987_I247900);
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,1,1,1);
25      book(_h_sigma,2,1,1);
26      book(_h_rate ,2,1,2);
27    }
28
29
30    /// Perform the per-event analysis
31    void analyze(const Event& event) {
32      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
33      for (const Particle& p : ufs.particles(Cuts::abspid==3334)) {
34	const double xp = 2.*p.E()/sqrtS();
35	const double beta = p.p3().mod() / p.E();
36	_h_spect->fill(xp,1./beta);
37	_h_sigma->fill(sqrtS());
38	_h_rate->fill(sqrtS());
39      }
40    }
41
42
43    /// Normalise histograms etc., after the run
44    void finalize() {
45
46      scale(_h_spect, sqr(sqrtS())*crossSection()/nanobarn/sumOfWeights());
47      scale(_h_sigma, crossSection()/picobarn/sumOfWeights());
48      scale(_h_rate , 1./sumOfWeights());
49    }
50
51    ///@}
52
53
54    /// @name Histograms
55    ///@{
56    Histo1DPtr _h_spect,_h_sigma,_h_rate;
57    ///@}
58
59
60  };
61
62
63  RIVET_DECLARE_PLUGIN(MARKII_1987_I247900);
64
65}