1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Hadron Spectra in $e^+e^-$ collisions at 29 GeV
 9  class HRS_1987_I215848 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1987_I215848);
14
15
16    /// @name Analysis methods
17    ///@{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21      declare(UnstableParticles(), "UFS");
22      book(_h["pi"],  2, 1, 1);
23      book(_h["Kp"],  3, 1, 1);
24      book(_h["p"],   4, 1, 1);
25      book(_h["K0"],  5, 1, 1);
26      book(_h["lam"], 6, 1, 1);
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()) {
34        const double xE = 2.*p.E()/sqrtS();
35        const double beta = p.p3().mod() / p.E();
36        if (p.pid()==130 || p.pid()==310) {
37          _h["K0"]->fill(xE,1./beta);
38        }
39        else if (p.abspid()==321) {
40          _h["Kp"]->fill(xE, 1./beta);
41        }
42        else if (p.abspid()==211) {
43          _h["pi"]->fill(xE, 1./beta);
44        }
45        else if (p.abspid()==2212) {
46          _h["p"]->fill(xE, 1./beta);
47        }
48        else if (p.abspid()==3122) {
49          _h["lam"]->fill(xE, 1./beta);
50        }
51      }
52    }
53
54    /// Normalise histograms etc., after the run
55    void finalize() {
56      const double sf = crossSection()*sqr(sqrtS())/microbarn/sumOfWeights();
57      scale(_h, sf);
58    }
59
60    ///@}
61
62
63    /// @name Histograms
64    ///@{
65    map<string, Histo1DPtr> _h;
66    ///@}
67
68
69  };
70
71
72  RIVET_DECLARE_PLUGIN(HRS_1987_I215848);
73
74}