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source: git/modules/TimeSmearing.cc@ a07b54c

Last change on this file since a07b54c was 341014c, checked in by Pavel Demin <pavel-demin@…>, 6 years ago

apply .clang-format to all .h, .cc and .cpp files

  • Property mode set to 100644
File size: 3.4 KB
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1/*
2 * Delphes: a framework for fast simulation of a generic collider experiment
3 * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19/** \class TimeSmearing
20 *
21 * Performs transverse momentum resolution smearing.
22 *
23 * \author P. Demin - UCL, Louvain-la-Neuve
24 *
25 */
26
27#include "modules/TimeSmearing.h"
28
29#include "classes/DelphesClasses.h"
30#include "classes/DelphesFactory.h"
31#include "classes/DelphesFormula.h"
32
33#include "ExRootAnalysis/ExRootClassifier.h"
34#include "ExRootAnalysis/ExRootFilter.h"
35#include "ExRootAnalysis/ExRootResult.h"
36
37#include "TDatabasePDG.h"
38#include "TFormula.h"
39#include "TLorentzVector.h"
40#include "TMath.h"
41#include "TObjArray.h"
42#include "TRandom3.h"
43#include "TString.h"
44
45#include <algorithm>
46#include <iostream>
47#include <sstream>
48#include <stdexcept>
49
50using namespace std;
51
52//------------------------------------------------------------------------------
53
54TimeSmearing::TimeSmearing() :
55 fItInputArray(0)
56{
57}
58
59//------------------------------------------------------------------------------
60
61TimeSmearing::~TimeSmearing()
62{
63}
64
65//------------------------------------------------------------------------------
66
67void TimeSmearing::Init()
68{
69 // read resolution formula
70
71 fTimeResolution = GetDouble("TimeResolution", 1.0E-10);
72 // import input array
73
74 fInputArray = ImportArray(GetString("InputArray", "MuonMomentumSmearing/muons"));
75 fItInputArray = fInputArray->MakeIterator();
76
77 // create output array
78
79 fOutputArray = ExportArray(GetString("OutputArray", "muons"));
80}
81
82//------------------------------------------------------------------------------
83
84void TimeSmearing::Finish()
85{
86 if(fItInputArray) delete fItInputArray;
87}
88
89//------------------------------------------------------------------------------
90
91void TimeSmearing::Process()
92{
93 Candidate *candidate, *mother;
94 Double_t ti, tf_smeared, tf;
95 const Double_t c_light = 2.99792458E8;
96
97 fItInputArray->Reset();
98 while((candidate = static_cast<Candidate *>(fItInputArray->Next())))
99 {
100 const TLorentzVector &candidateInitialPosition = candidate->InitialPosition;
101 const TLorentzVector &candidateFinalPosition = candidate->Position;
102
103 ti = candidateInitialPosition.T() * 1.0E-3 / c_light;
104 tf = candidateFinalPosition.T() * 1.0E-3 / c_light;
105
106 // apply smearing formula
107 tf_smeared = gRandom->Gaus(tf, fTimeResolution);
108 ti = ti + tf_smeared - tf;
109 tf = tf_smeared;
110
111 mother = candidate;
112 candidate = static_cast<Candidate *>(candidate->Clone());
113 candidate->InitialPosition.SetT(ti * 1.0E3 * c_light);
114 candidate->Position.SetT(tf * 1.0E3 * c_light);
115
116 candidate->ErrorT = fTimeResolution * 1.0E3 * c_light;
117
118 candidate->AddCandidate(mother);
119
120 fOutputArray->Add(candidate);
121 }
122}
123
124//------------------------------------------------------------------------------
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