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source: svn/trunk/src/LHEFConverter.cc@ 446

Last change on this file since 446 was 443, checked in by Xavier Rouby, 15 years ago

new header in all files
File size: 6.9 KB
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1/***********************************************************************
2** **
3** /----------------------------------------------\ **
4** | Delphes, a framework for the fast simulation | **
5** | of a generic collider experiment | **
6** \------------- arXiv:0903.2225v1 ------------/ **
7** **
8** **
9** This package uses: **
10** ------------------ **
11** ROOT: Nucl. Inst. & Meth. in Phys. Res. A389 (1997) 81-86 **
12** FastJet algorithm: Phys. Lett. B641 (2006) [hep-ph/0512210] **
13** Hector: JINST 2:P09005 (2007) [physics.acc-ph:0707.1198v2] **
14** FROG: [hep-ex/0901.2718v1] **
15** HepMC: Comput. Phys. Commun.134 (2001) 41 **
16** **
17** ------------------------------------------------------------------ **
18** **
19** Main authors: **
20** ------------- **
21** **
22** Severine Ovyn Xavier Rouby **
23** severine.ovyn@uclouvain.be xavier.rouby@cern **
24** **
25** Center for Particle Physics and Phenomenology (CP3) **
26** Universite catholique de Louvain (UCL) **
27** Louvain-la-Neuve, Belgium **
28** **
29** Copyright (C) 2008-2009, **
30** All rights reserved. **
31** **
32***********************************************************************/
33
34#include <iostream>
35#include <fstream>
36
37#include "TLorentzVector.h"
38
39#include "ExRootTreeWriter.h"
40#include "BlockClasses.h"
41#include "LHEFConverter.h"
42#include "SmearUtil.h"
43#include "PdgParticle.h"
44
45using namespace std;
46
47
48//------------------------------------------------------------------------------
49
50void LHEFConverter::AnalyseEvent(LHEF::Reader *reader, ExRootTreeBranch *branch, const Long64_t eventNumber)
51{
52 const LHEF::HEPEUP &hepeup = reader->hepeup;
53
54 TRootLHEFEvent *element;
55
56 element = (TRootLHEFEvent*) branch->NewEntry();
57
58 element->Number = eventNumber;
59 element->Nparticles = hepeup.NUP;
60 element->ProcessID = hepeup.IDPRUP;
61 element->Weight = hepeup.XWGTUP;
62 element->ScalePDF = hepeup.SCALUP;
63 element->CouplingQED = hepeup.AQEDUP;
64 element->CouplingQCD = hepeup.AQCDUP;
65}
66
67//---------------------------------------------------------------------------
68
69void LHEFConverter::AnalyseParticles(LHEF::Reader *reader, ExRootTreeBranch *branch)
70{
71 const LHEF::HEPEUP &hepeup = reader->hepeup;
72 Double_t signPz;
73 TLorentzVector momentum;
74 TRootLHEFParticle *element;
75
76 for(Int_t particle = 0; particle < hepeup.NUP; ++particle)
77 {
78 element = (TRootLHEFParticle*) branch->NewEntry();
79
80 element->PID = hepeup.IDUP[particle];
81 element->Status = hepeup.ISTUP[particle];
82 element->Mother1 = hepeup.MOTHUP[particle].first;
83 element->Mother2 = hepeup.MOTHUP[particle].second;
84 element->ColorLine1 = hepeup.ICOLUP[particle].first;
85 element->ColorLine2 = hepeup.ICOLUP[particle].second;
86 element->Px = hepeup.PUP[particle][0];
87 element->Py = hepeup.PUP[particle][1];
88 element->Pz = hepeup.PUP[particle][2];
89 element->E = hepeup.PUP[particle][3];
90 //element->M = hepeup.PUP[particle][4];
91 //element->Charge = ChargeVal(element->PID);
92
93 PdgParticle pdg_part = pdg_table[element->PID];
94 element->Charge = pdg_part.charge();
95 element->M = pdg_part.mass();
96
97 momentum.SetPxPyPzE(element->Px, element->Py, element->Pz, element->E);
98 element->PT = momentum.Perp();
99 signPz = (element->Pz >= 0.0) ? 1.0 : -1.0;
100 //element->Eta = element->PT == 0.0 ? signPz*999.9 : momentum.Eta(); to avoid a warning from ROOT, replace the "==0" by "< 1e-6"
101 element->Eta = element->PT < 1E-6 ? signPz*999.9 : momentum.Eta();
102 element->Phi = momentum.Phi();
103 element->Rapidity = element->PT < 1E-6 ? signPz*999.9 : momentum.Rapidity();
104 element->LifeTime = hepeup.VTIMUP[particle];
105 element->Spin = hepeup.SPINUP[particle];
106 }
107}
108
109LHEFConverter::~LHEFConverter()
110{
111}
112
113//------------------------------------------------------------------------------
114LHEFConverter::LHEFConverter(const string& inputFileList, const string& outputFileName, const PdgTable& pdg, const int& Nevents) :
115 DataConverter(pdg,Nevents) {
116
117 ExRootTreeWriter *treeWriter = new ExRootTreeWriter(outputFileName, "GEN");
118
119 // generated event from LHEF
120 ExRootTreeBranch *branchEvent = treeWriter->NewBranch("Event", TRootLHEFEvent::Class());
121
122 // generated partons from LHEF
123 ExRootTreeBranch *branchParticle = treeWriter->NewBranch("Particle", TRootLHEFParticle::Class());
124
125 // Open a stream connected to an event file:
126 ifstream infile(inputFileList.c_str());
127 string filename;
128 if(!infile.is_open()) {
129 cerr << left << setw(30) <<"** ERROR: Can't open "<<""
130 << left << setw(20) << inputFileList <<""
131 << right << setw(19) <<"for input **"<<""<<endl;
132 exit(1);
133 }
134
135 while(1) { // parsing the list of files
136
137 infile >> filename;
138 if(!infile.good()) break;
139 ifstream checking_the_file(filename.c_str());
140 if(!checking_the_file.good())
141 {
142 cerr << left << setw(30) <<"** ERROR: Can't find file "<<""
143 << left << setw(20) << filename <<""
144 << right << setw(19) <<"for input **"<<""<<endl;
145 continue;
146 }
147 else checking_the_file.close();
148
149 // Create the Reader object:
150 LHEF::Reader *inputReader = new LHEF::Reader(filename);
151
152 Long64_t allEntries = inputReader->getNumberOfEvents();
153 allEntries = (Nevt<0)?allEntries:min((int)allEntries,Nevt); // do not miss the "+1"
154
155 if(allEntries > 0) {
156 // Loop over all events
157 Long64_t entry = 0;
158 while(inputReader->readEvent()) {
159 treeWriter->Clear();
160 AnalyseEvent(inputReader, branchEvent, entry + 1);
161 AnalyseParticles(inputReader, branchParticle);
162 treeWriter->Fill();
163 ++entry;
164 if(allEntries<entry+1) break;
165 }
166 }
167 }
168 treeWriter->Write();
169
170
171 delete treeWriter;
172 //delete inputReader;
173}
174
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