1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4#include "Rivet/Projections/ZFinder.hh"
 5
 6namespace Rivet {
 7
 8
 9  /// @brief CDF Z boson rapidity measurement
10  class CDF_2009_I856131 : public Analysis {
11  public:
12
13    /// @name Constructors etc.
14    //@{
15
16    /// Constructor
17    RIVET_DEFAULT_ANALYSIS_CTOR(CDF_2009_I856131);
18
19    //@}
20
21
22  public:
23
24    /// @name Analysis methods
25    //@{
26
27    /// Book histograms and initialise projections before the run
28    void init() {
29
30      /// Initialise and register projections here
31      // this seems to have been corrected completely for all selection cuts,
32      // i.e. eta cuts and pT cuts on leptons.
33      ZFinder zfinder(FinalState(), Cuts::open(), PID::ELECTRON,
34                      66*GeV, 116*GeV, 0.2, ZFinder::ClusterPhotons::NODECAY, ZFinder::AddPhotons::YES);
35      declare(zfinder, "ZFinder");
36
37
38      /// Book histograms here
39      book(_h_xs ,1, 1, 1);
40      book(_h_yZ ,2, 1, 1);
41
42    }
43
44
45    /// Perform the per-event analysis
46    void analyze(const Event& event) {
47      const ZFinder& zfinder = apply<ZFinder>(event, "ZFinder");
48      if (zfinder.bosons().size() == 1) {
49        _h_yZ->fill(fabs(zfinder.bosons()[0].rapidity()));
50        _h_xs->fill(1960);
51      } else {
52        MSG_DEBUG("no unique lepton pair found.");
53      }
54
55    }
56
57
58    /// Normalise histograms etc., after the run
59    void finalize() {
60      scale(_h_xs, crossSection()/sumOfWeights());
61      // Data seems to have been normalized for the avg of the two sides
62      // (+ve & -ve rapidity) rather than the sum, hence the 0.5:
63      scale(_h_yZ, 0.5*crossSection()/sumOfWeights());
64    }
65
66    //@}
67
68
69  private:
70
71    /// @name Histograms
72    //@{
73    Histo1DPtr _h_yZ;
74    Histo1DPtr _h_xs;
75    //@}
76
77  };
78
79
80
81  // The hook for the plugin system
82  RIVET_DECLARE_PLUGIN(CDF_2009_I856131);
83
84}