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      Scatter2D temphisto(refData(6, 1, 1));
43      Scatter2DPtr mult;
44      book(mult, 6, 1, 1);
45      for (size_t b = 0; b < temphisto.numPoints(); b++) {
46	const double x  = temphisto.point(b).x();
47	pair<double,double> ex = temphisto.point(b).xErrs();
48	pair<double,double> ex2 = ex;
49	if(ex2.first ==0.) ex2. first=0.0001;
50	if(ex2.second==0.) ex2.second=0.0001;
51	if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
52	  mult->addPoint(x, sigma, ex, make_pair(error,error));
53	}
54	else {
55	  mult->addPoint(x, 0., ex, make_pair(0.,.0));
56	}
57      }
58    }
59
60    //@}
61
62
63    /// @name Histograms
64    //@{
65    CounterPtr _nHadrons;
66    //@}
67
68
69  };
70
71
72  // The hook for the plugin system
73  RIVET_DECLARE_PLUGIN(MARKI_1982_I169326);
74
75
76}