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RestFrames  v1.0.1
RestFrames HEP Event Analysis Software Library
MinMassDiffInvJigsaw.hh
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1 // RestFrames: particle physics event analysis library
3 // --------------------------------------------------------------------
4 // Copyright (c) 2014-2016, Christopher Rogan
14 // This file is part of RestFrames.
15 //
16 // RestFrames is free software; you can redistribute it and/or modify
17 // it under the terms of the GNU General Public License as published by
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29 
30 #ifndef MinMassDiffInvJigsaw_HH
31 #define MinMassDiffInvJigsaw_HH
32 
33 #include "Math/Minimizer.h"
34 #include "Math/Functor.h"
35 
37 
38 namespace RestFrames {
39 
41  public:
42  MinMassDiffInvJigsaw(const std::string& sname,
43  const std::string& stitle,
44  int N_vis_inv_pair);
46 
47  virtual std::string GetLabel() const { return "Min #Sigma M(vis , inv)_{i}^{2}"; }
48 
49  virtual double GetMinimumMass() const;
50 
51  virtual bool AnalyzeEvent();
52 
53  private:
54  const int m_Npair;
55  mutable std::vector<TLorentzVector> m_Pvis;
56  mutable std::vector<TLorentzVector> m_Pinv;
57  std::vector<double> m_Minv;
58 
59  bool m_2D;
60  TVector3 m_X;
61  TVector3 m_Y;
62  TVector3 m_Z;
63 
64  double GetPScale(double Minv);
65  void ApplyOptimalRotation();
66 
67  ROOT::Math::Minimizer* m_minimizer;
68  ROOT::Math::Functor* m_functor;
69 
70  double EvaluateMetric(const double* param);
71 
72  };
73 
74 }
75 
76 #endif