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source: git/modules/EnergySmearing.cc@ b1e03e5

ImprovedOutputFile Timing dual_readout llp
Last change on this file since b1e03e5 was c4b2aae, checked in by Michele Selvaggi <michele.selvaggi@…>, 9 years ago

fixed TrackResolution in EnergySmearing module

  • Property mode set to 100644
File size: 3.6 KB
Line 
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
20/** \class EnergySmearing
21 *
22 * Performs energy resolution smearing.
23 *
24 * \author P. Demin - UCL, Louvain-la-Neuve
25 *
26 */
27
28#include "modules/EnergySmearing.h"
29
30#include "classes/DelphesClasses.h"
31#include "classes/DelphesFactory.h"
32#include "classes/DelphesFormula.h"
33
34#include "ExRootAnalysis/ExRootResult.h"
35#include "ExRootAnalysis/ExRootFilter.h"
36#include "ExRootAnalysis/ExRootClassifier.h"
37
38#include "TMath.h"
39#include "TString.h"
40#include "TFormula.h"
41#include "TRandom3.h"
42#include "TObjArray.h"
43#include "TDatabasePDG.h"
44#include "TLorentzVector.h"
45
46#include <algorithm>
47#include <stdexcept>
48#include <iostream>
49#include <sstream>
50
51using namespace std;
52
53//------------------------------------------------------------------------------
54
55EnergySmearing::EnergySmearing() :
56 fFormula(0), fItInputArray(0)
57{
58 fFormula = new DelphesFormula;
59}
60
61//------------------------------------------------------------------------------
62
63EnergySmearing::~EnergySmearing()
64{
65 if(fFormula) delete fFormula;
66}
67
68//------------------------------------------------------------------------------
69
70void EnergySmearing::Init()
71{
72 // read resolution formula
73
74 fFormula->Compile(GetString("ResolutionFormula", "0.0"));
75
76 // import input array
77
78 fInputArray = ImportArray(GetString("InputArray", "ParticlePropagator/stableParticles"));
79 fItInputArray = fInputArray->MakeIterator();
80
81 // create output array
82
83 fOutputArray = ExportArray(GetString("OutputArray", "stableParticles"));
84}
85
86//------------------------------------------------------------------------------
87
88void EnergySmearing::Finish()
89{
90 if(fItInputArray) delete fItInputArray;
91}
92
93//------------------------------------------------------------------------------
94
95void EnergySmearing::Process()
96{
97 Candidate *candidate, *mother;
98 Double_t pt, energy, eta, phi;
99
100 fItInputArray->Reset();
101 while((candidate = static_cast<Candidate*>(fItInputArray->Next())))
102 {
103 const TLorentzVector &candidatePosition = candidate->Position;
104 const TLorentzVector &candidateMomentum = candidate->Momentum;
105
106 pt = candidatePosition.Pt();
107 eta = candidatePosition.Eta();
108 phi = candidatePosition.Phi();
109 energy = candidateMomentum.E();
110
111 // apply smearing formula
112 energy = gRandom->Gaus(energy, fFormula->Eval(pt, eta, phi, energy));
113
114 if(energy <= 0.0) continue;
115
116 mother = candidate;
117 candidate = static_cast<Candidate*>(candidate->Clone());
118 eta = candidateMomentum.Eta();
119 phi = candidateMomentum.Phi();
120 candidate->Momentum.SetPtEtaPhiE(energy/TMath::CosH(eta), eta, phi, energy);
121 candidate->TrackResolution = fFormula->Eval(pt, eta, phi, energy)/candidateMomentum.E();
122 candidate->AddCandidate(mother);
123
124 fOutputArray->Add(candidate);
125 }
126}
127
128//------------------------------------------------------------------------------
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