1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief inclusive eta production
 9  class DASP_1979_I132410 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(DASP_1979_I132410);
14
15
16    /// @name Analysis methods
17    /// @{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21
22      // Initialise and register projections
23      declare(UnstableParticles(), "UFS");
24
25      // Book histograms
26      book(_c_eta, "/TMP/neta");
27
28    }
29
30
31    /// Perform the per-event analysis
32    void analyze(const Event& event) {
33      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
34      _c_eta->fill(ufs.particles(Cuts::pid==221).size());
35    }
36
37
38    /// Normalise histograms etc., after the run
39    void finalize() {
40      scale(_c_eta,1./sumOfWeights()*crossSection()/nanobarn);
41      Estimate1DPtr mult;
42      book(mult, 1, 1, 1);
43      for (auto& b : mult->bins()) {
44        if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
45          b.set(_c_eta->val(), _c_eta->err());
46        }
47      }
48    }
49
50    /// @}
51
52
53    /// @name Histograms
54    /// @{
55    CounterPtr _c_eta;
56    /// @}
57
58
59  };
60
61
62  RIVET_DECLARE_PLUGIN(DASP_1979_I132410);
63
64
65}