1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/GammaGammaFinalState.hh"
 4#include "Rivet/Projections/FastJets.hh"
 5
 6namespace Rivet {
 7
 8
 9  /// @brief Jet production in photon-photon collisions at 198 GeV
10  class L3_2004_I661114 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(L3_2004_I661114);
15
16
17    /// @name Analysis methods
18    //@{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22      // get the hadronic final state
23      const GammaGammaKinematics& diskin = declare(GammaGammaKinematics(), "Kinematics");
24      const FinalState & fs = declare(GammaGammaFinalState(diskin), "FS");
25      declare(FastJets(fs, FastJets::KT,1.),"Jets");
26
27      // Book histograms
28      book(_h_y, 1, 1, 1);
29
30    }
31
32
33    /// Perform the per-event analysis
34    void analyze(const Event& event) {
35      Jets jets = apply<FastJets>(event, "Jets").jetsByPt(Cuts::pT > 3*GeV and Cuts::abseta < 1.0);
36      if(jets.empty()) vetoEvent;
37      for(const Jet & jet : jets) {
38      	_h_y->fill(jet.pT());
39      }
40    }
41
42
43    /// Normalise histograms etc., after the run
44    void finalize() {
45
46      scale(_h_y, crossSection()/picobarn/sumOfWeights());
47
48    }
49
50    //@}
51
52
53    /// @name Histograms
54    //@{
55    Histo1DPtr _h_y;
56    //@}
57
58
59  };
60
61
62  // The hook for the plugin system
63  RIVET_DECLARE_PLUGIN(L3_2004_I661114);
64
65
66}