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RestFrames  v1.0.1
RestFrames HEP Event Analysis Software Library
MinMassDiffCombJigsaw.cc
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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
18 // the Free Software Foundation; either version 2 of the License, or
19 // (at your option) any later version.
20 //
21 // RestFrames is distributed in the hope that it will be useful,
22 // but WITHOUT ANY WARRANTY; without even the implied warranty of
23 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 // GNU General Public License for more details.
25 //
26 // You should have received a copy of the GNU General Public License
27 // along with RestFrames. If not, see <http://www.gnu.org/licenses/>.
29 
30 #include "RestFrames/RestFrame.hh"
32 
33 namespace RestFrames {
34 
35  MinMassDiffCombJigsaw::MinMassDiffCombJigsaw(const std::string& sname,
36  const std::string& stitle,
37  int N_comb, int N_mass)
38  : CombinatoricJigsaw(sname, stitle, N_comb, N_mass),
39  m_Ncomb(N_comb), m_Nmass(N_mass) {}
40 
41  MinMassDiffCombJigsaw::~MinMassDiffCombJigsaw() {}
42 
43  bool MinMassDiffCombJigsaw::EvaluateMetric(double& metric) const {
44  double diff = 0.;
45  double m1, m2;
46 
47  for(int i = 0; i < m_Nmass-1; i++){
48  m1 = GetDependancyStates(i).GetFourVector().M();
49  for(int j = i+1; i < m_Nmass; j++){
50  m2 = GetDependancyStates(j).GetFourVector().M();
51  diff += (m1-m2)*(m1-m2);
52  }
53  }
54 
55  metric = diff;
56  return true;
57  }
58 
59 }
60