1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/ChargedFinalState.hh"
 4#include "Rivet/Projections/UnstableParticles.hh"
 5
 6namespace Rivet {
 7
 8
 9  /// @brief pi0 and charged particle spectra
10  class L3_1991_I314407 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(L3_1991_I314407);
15
16
17    /// @name Analysis methods
18    /// @{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22      // projections
23      declare(ChargedFinalState(), "FS");
24      declare(UnstableParticles(), "UFS");
25      // book histos
26      book(_h_pi0_x     ,3,1,1);
27      book(_h_pi0_xi    ,4,1,1);
28      book(_h_charged_x ,5,1,1);
29      book(_h_charged_xi,6,1,1);
30    }
31
32
33    /// Perform the per-event analysis
34    void analyze(const Event& event) {
35      const FinalState& fs = apply<FinalState>(event, "FS");
36      for (const Particle& p : fs.particles()) {
37        const double x = 2.*p.momentum().p3().mod()/sqrtS();
38	_h_charged_x ->fill(x);
39	_h_charged_xi->fill(-log(x));
40
41
42      }
43      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
44      for (const Particle & p : ufs.particles(Cuts::pid==PID::PI0)) {
45        const double x = 2.*p.momentum().p3().mod()/sqrtS();
46	_h_pi0_x ->fill(x);
47	_h_pi0_xi->fill(-log(x));
48      }
49    }
50
51
52    /// Normalise histograms etc., after the run
53    void finalize() {
54      scale(_h_pi0_x     , 1./sumOfWeights());
55      scale(_h_pi0_xi    , 1./sumOfWeights());
56      scale(_h_charged_x , 1./sumOfWeights());
57      scale(_h_charged_xi, 1./sumOfWeights());
58    }
59
60    /// @}
61
62
63    /// @name Histograms
64    /// @{
65    Histo1DPtr _h_pi0_x,_h_pi0_xi,_h_charged_x,_h_charged_xi;
66    /// @}
67
68
69  };
70
71
72  RIVET_DECLARE_PLUGIN(L3_1991_I314407);
73
74}