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_1975_I100592 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(MARKI_1975_I100592);
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      book(_nEvent, "TMP/event");
28
29    }
30
31
32    /// Perform the per-event analysis
33    void analyze(const Event& event) {
34      const ChargedFinalState& fs = apply<ChargedFinalState>(event, "FS");
35      _nEvent->fill();
36      _nHadrons->fill(fs.particles().size());
37    }
38
39    /// Normalise histograms etc., after the run
40    void finalize() {
41      for(unsigned int ix=1;ix<3;++ix) {
42	double sigma,error;
43	if(ix==1) {
44	  sigma = _nEvent->val()*crossSection()/ sumOfWeights() /nanobarn;
45	  error = _nEvent->err()*crossSection()/ sumOfWeights() /nanobarn;
46	}
47	else {
48	  sigma = _nHadrons->val()/sumOfWeights();
49	  error = _nHadrons->err()/sumOfWeights();
50	}
51	Scatter2D temphisto(refData(ix, 1, 1));
52	Scatter2DPtr mult;
53	book(mult, ix, 1, 1);
54	for (size_t b = 0; b < temphisto.numPoints(); b++) {
55	  const double x  = temphisto.point(b).x();
56	  pair<double,double> ex = temphisto.point(b).xErrs();
57	  pair<double,double> ex2 = ex;
58	  if(ex2.first ==0.) ex2. first=0.0001;
59	  if(ex2.second==0.) ex2.second=0.0001;
60	  if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
61	    mult->addPoint(x, sigma, ex, make_pair(error,error));
62	  }
63	  else {
64	    mult->addPoint(x, 0., ex, make_pair(0.,.0));
65	  }
66	}
67      }
68    }
69
70    //@}
71
72
73    /// @name Histograms
74    //@{
75    CounterPtr _nHadrons,_nEvent;
76    //@}
77
78
79  };
80
81
82  // The hook for the plugin system
83  RIVET_DECLARE_PLUGIN(MARKI_1975_I100592);
84
85
86}