1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Add a short analysis description here
 9  class CLEO_2005_I1649168 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_2005_I1649168);
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(UnstableParticles(), "UFS");
24
25      // Book histograms
26      book(_h_4S, 1, 1, 7);
27      book(_h_5S, 1, 1, 8);
28      book(_c_4S, "/TMP/N4S");
29      book(_c_5S, "/TMP/N5S");
30    }
31
32
33    void findDecayProducts(const Particle & p, Particles & ds) {
34      for(const Particle & child : p.children()) {
35	if(child.abspid()==431)
36	  ds.push_back(child);
37	else if(!child.children().empty())
38	  findDecayProducts(child,ds);
39      }
40    }
41
42    /// Perform the per-event analysis
43    void analyze(const Event& event) {
44      // Find the Upsilons among the unstables
45      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
46      Particles upsilons = ufs.particles(Cuts::pid==300553 || Cuts::pid==400553 || Cuts::pid==9000553);
47      for (const Particle& ups : upsilons) {
48        LorentzTransform cms_boost;
49        if (ups.p3().mod() > 1*MeV)
50          cms_boost = LorentzTransform::mkFrameTransformFromBeta(ups.momentum().betaVec());
51	Particles ds;
52        findDecayProducts(ups, ds);
53
54	if(ups.pid()==300553)
55	  _c_4S->fill();
56	else
57	  _c_5S->fill();
58
59	for(const Particle & p : ds) {
60          FourMomentum p2 = cms_boost.transform(p.momentum());
61	  double x = 2.*p2.p3().mod()/ups.mass();
62	if(ups.pid()==300553)
63	  _h_4S->fill(x);
64	else
65	  _h_5S->fill(x);
66	}
67      }
68    }
69
70
71    /// Normalise histograms etc., after the run
72    void finalize() {
73      if(_h_4S->effNumEntries()!=0)
74	scale(_h_4S   ,100./ *_c_4S);
75      if(_h_5S->effNumEntries()!=0)
76	scale(_h_5S   ,100./ *_c_5S);
77    }
78
79    /// @}
80
81
82    /// @name Histograms
83    /// @{
84    Histo1DPtr _h_4S,_h_5S;
85    CounterPtr _c_4S,_c_5S;
86    /// @}
87
88
89  };
90
91
92  RIVET_DECLARE_PLUGIN(CLEO_2005_I1649168);
93
94
95}