1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/ChargedFinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Add a short analysis description here
 9  class MARKI_1982_I169326 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(MARKI_1982_I169326);
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(ChargedFinalState(), "FS");
24
25      // Book histograms
26      book(_nHadrons, "TMP/hadrons");
27
28    }
29
30
31    /// Perform the per-event analysis
32    void analyze(const Event& event) {
33      const ChargedFinalState& fs = apply<ChargedFinalState>(event, "FS");
34      _nHadrons->fill(fs.particles().size());
35    }
36
37
38    /// Normalise histograms etc., after the run
39    void finalize() {
40      double sigma = _nHadrons->val()/sumOfWeights();
41      double error = _nHadrons->err()/sumOfWeights();
42      Estimate1DPtr mult;
43      book(mult, 6, 1, 1);
44      for (auto& b : mult->bins()) {
45        if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
46          b.set(sigma, error);
47        }
48      }
49    }
50
51    /// @}
52
53
54    /// @name Histograms
55    /// @{
56    CounterPtr _nHadrons;
57    /// @}
58
59
60  };
61
62
63  RIVET_DECLARE_PLUGIN(MARKI_1982_I169326);
64
65
66}