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Last change on this file since 456 was 456, checked in by Xavier Rouby, 15 years ago

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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/// \file Resolution_ATLAS.cpp
35/// \brief Prepares the resolution calculation
36
37#include "TChain.h"
38#include "TApplication.h"
39#include "TFile.h"
40
41#include "ExRootTreeReader.h"
42#include "ExRootTreeWriter.h"
43#include "ExRootTreeBranch.h"
44#include "TreeClasses.h"
45
46#include "DataConverter.h"
47#include "HEPEVTConverter.h"
48#include "LHEFConverter.h"
49#include "STDHEPConverter.h"
50
51#include "SmearUtil.h"
52#include "JetsUtil.h"
53#include "BFieldProp.h"
54
55//#include "PseudoJet.hh"
56//#include "ClusterSequence.hh"
57
58#include<vector>
59#include<iostream>
60
61using namespace std;
62
63//------------------------------------------------------------------------------
64
65// //********************************** PYTHIA INFORMATION*********************************
66
67TSimpleArray<TRootGenParticle> TauHadr(const TClonesArray *GEN)
68 {
69 TIter it((TCollection*)GEN);
70 it.Reset();
71 TRootGenParticle *gen1;
72 TSimpleArray<TRootGenParticle> array,array2;
73
74 while((gen1 = (TRootGenParticle*) it.Next()))
75 {
76 array.Add(gen1);
77 }
78 it.Reset();
79 bool tauhad;
80 while((gen1 = (TRootGenParticle*) it.Next()))
81 {
82 tauhad=false;
83 if(abs(gen1->PID)==15)
84 {
85 int d1=gen1->D1;
86 int d2=gen1->D2;
87 if((d1 < array.GetEntries()) && (d1 > 0) && (d2 < array.GetEntries()) && (d2 > 0))
88 {
89 tauhad=true;
90 for(int d=d1; d < d2+1; d++)
91 {
92 if(abs(array[d]->PID)== pE || abs(array[d]->PID)== pMU)tauhad=false;
93 }
94 }
95 }
96 if(tauhad)array2.Add(gen1);
97 }
98 return array2;
99 }
100
101double EnergySmallCone(const vector<TLorentzVector> &towers, const float eta, const float phi,float energy_scone,float JET_seed) {
102 double Energie=0;
103 for(unsigned int i=0; i < towers.size(); i++) {
104 if(towers[i].Pt() < JET_seed) continue;
105 if((DeltaR(phi,eta,towers[i].Phi(),towers[i].Eta()) < energy_scone)) {
106 Energie += towers[i].E();
107 }
108 }
109 return Energie;
110}
111
112
113void PairingJet(TLorentzVector &JETSm, const TLorentzVector &JET, const TClonesArray *branchJet, const float dR=0.25)
114{
115 JETSm.SetPxPyPzE(0,0,0,0);
116 float deltaRtest=5000;
117 TIter itJet((TCollection*)branchJet);
118 TRootJet *jet;
119 itJet.Reset();
120 while( (jet = (TRootJet*) itJet.Next()) )
121 {
122 TLorentzVector Att;
123 Att.SetPtEtaPhiE(jet->PT,jet->Eta,jet->Phi,jet->E);
124 if(DeltaR(JET.Phi(),JET.Eta(),Att.Phi(),Att.Eta()) < deltaRtest)
125 {
126 deltaRtest = DeltaR(JET.Phi(),JET.Eta(),Att.Phi(),Att.Eta());
127 if(deltaRtest < dR)
128 {
129 JETSm = Att;
130 }
131 }
132 }
133}
134
135void PairingElec(TLorentzVector &ELECSm, const TLorentzVector &ELEC, const TClonesArray *branchElec)
136{
137 ELECSm.SetPxPyPzE(0,0,0,0);
138 float deltaRtest=5000;
139 TIter itElec((TCollection*)branchElec);
140 TRootElectron *elec;
141 itElec.Reset();
142 while( (elec = (TRootElectron*) itElec.Next()) )
143 {
144 TLorentzVector Att;
145 Att.SetPtEtaPhiE(elec->PT,elec->Eta,elec->Phi,elec->E);
146 if(DeltaR(ELEC.Phi(),ELEC.Eta(),Att.Phi(),Att.Eta()) < deltaRtest)
147 {
148 deltaRtest = DeltaR(ELEC.Phi(),ELEC.Eta(),Att.Phi(),Att.Eta());
149 if(deltaRtest < 0.025)
150 {
151 ELECSm = Att;
152 }
153 }
154 }
155}
156
157void PairingMuon(TLorentzVector &MUONSm, const TLorentzVector &MUON, const TClonesArray *branchMuon)
158{
159 MUONSm.SetPxPyPzE(0,0,0,0);
160 float deltaRtest=5000;
161 TIter itMuon((TCollection*)branchMuon);
162 TRootMuon *muon;
163 itMuon.Reset();
164 while( (muon = (TRootMuon*) itMuon.Next()) )
165 {
166 TLorentzVector Att;
167 Att.SetPxPyPzE(muon->Px,muon->Py,muon->Pz,muon->E);
168 if(DeltaR(MUON.Phi(),MUON.Eta(),Att.Phi(),Att.Eta()) < deltaRtest)
169 {
170 deltaRtest = DeltaR(MUON.Phi(),MUON.Eta(),Att.Phi(),Att.Eta());
171 if(deltaRtest < 0.025)
172 {
173 MUONSm = Att;
174 }
175 }
176 }
177}
178
179unsigned int NumTracks(const TClonesArray *branchTracks, const float pt_track, const float eta, const float phi,float track_scone) {
180 unsigned int numtrack=0;
181 TIter itTrack((TCollection*)branchTracks);
182 TRootTracks *track;
183 itTrack.Reset();
184 while( (track = (TRootTracks*) itTrack.Next()) )
185 {
186 if((track->PT < pt_track )||
187 (DeltaR(phi,eta,track->Phi,track->Eta) > track_scone)
188 )continue;
189 numtrack++;
190 }
191 return numtrack;
192}
193
194
195
196int main(int argc, char *argv[])
197{
198 int appargc = 2;
199 char *appName = "Resolution";
200 char *appargv[] = {appName, "-b"};
201 TApplication app(appName, &appargc, appargv);
202
203 if(argc != 3) {
204 cout << " Usage: " << argv[0] << " input_file" << " output_file" << endl;
205 cout << " input_file - input file in Delphes-root format," << endl;
206 cout << " output_file - output file." << endl;
207 exit(1);
208 }
209
210 srand (time (NULL)); /* Initialisation du générateur */
211
212 //read the input TROOT file
213 string inputfilename(argv[1]), outputfilename(argv[2]);
214
215 if(outputfilename.find(".root") > outputfilename.length() ) {
216 cout << "output_file should be a .root file!\n";
217 return -1;
218 }
219
220
221
222 TFile *outputFile = TFile::Open(outputfilename.c_str(), "RECREATE");// Creates the file, but should be closed just after
223 outputFile->Close();
224
225 TChain chainGEN("GEN");
226 chainGEN.Add(inputfilename.c_str());
227 ExRootTreeReader *treeReaderGEN = new ExRootTreeReader(&chainGEN);
228 TChain chain("Analysis");
229 chain.Add(inputfilename.c_str());
230 ExRootTreeReader *treeReader = new ExRootTreeReader(&chain);
231 const TClonesArray *branchJet = treeReader->UseBranch("Jet");
232 const TClonesArray *branchElec = treeReader->UseBranch("Electron");
233 const TClonesArray *branchMuon = treeReader->UseBranch("Muon");
234 const TClonesArray *branchTracks = treeReader->UseBranch("Tracks");
235 const TClonesArray *branchTowers = treeReader->UseBranch("CaloTower");
236 const TClonesArray *branchGen = treeReaderGEN->UseBranch("Particle");
237 TIter itGen((TCollection*)branchGen);
238
239 //write the output root file
240 ExRootTreeWriter *treeWriter = new ExRootTreeWriter(outputfilename, "Analysis");
241 ExRootTreeBranch *branchjet = treeWriter->NewBranch("JetPTResol", RESOLJET::Class());
242 ExRootTreeBranch *branchelec = treeWriter->NewBranch("ElecEResol", RESOLELEC::Class());
243 ExRootTreeBranch *branchmuon = treeWriter->NewBranch("MuonPTResol", RESOLMUON::Class());
244 ExRootTreeBranch *branchtaujet = treeWriter->NewBranch("TauJetPTResol", TAUHAD::Class());
245 ExRootTreeBranch *branchetmis = treeWriter->NewBranch("ETmisResol",ETMIS::Class());
246
247 TRootGenParticle *particle;
248
249 RESOLELEC * elementElec;
250 RESOLMUON *elementMuon;
251 RESOLJET *elementJet;
252 TAUHAD *elementTaujet;
253 ETMIS *elementEtmis;
254
255 int numTau=0;
256 int numTauRec=0;
257
258 RESOLution *DET = new RESOLution();
259 /*
260 string detectorcard = "data/DetectorCard_CMS.dat";
261 const float dR_jetpairing = 0.25;
262 const float jet_pt_cut = 1;
263 */
264 string detectorcard = "data/DetectorCard_ATLAS.dat";
265 const float dR_jetpairing = 0.2;
266 const float jet_pt_cut = 7;
267 DET->ReadDataCard(detectorcard);
268
269
270 //Jet information
271 JetsUtil *JETRUN = new JetsUtil(detectorcard);
272
273 TLorentzVector genMomentum(0,0,0,0);//TLorentzVector containing generator level information
274 TLorentzVector recoMomentum(0,0,0,0);//TLorentzVector containing generator level information
275 LorentzVector jetMomentum;
276
277 vector<fastjet::PseudoJet> input_particlesGEN;//for FastJet algorithm
278 vector<fastjet::PseudoJet> sorted_jetsGEN;
279 vector<int> NTrackJet;
280 vector<TLorentzVector> towers;
281
282 // Loop over all events
283 Long64_t entry, allEntries = treeReader->GetEntries();
284 cout << "** Chain contains " << allEntries << " events" << endl;
285 for(entry = 0; entry < allEntries; ++entry)
286 {
287 TLorentzVector PTmisReco(0,0,0,0);
288 TLorentzVector PTmisGEN(0,0,0,0);
289 treeReader->ReadEntry(entry);
290 treeReaderGEN->ReadEntry(entry);
291 treeWriter->Clear();
292 if((entry % 100) == 0 && entry > 0 ) cout << "** Processing element # " << entry << endl;
293
294 TSimpleArray<TRootGenParticle> bGen;
295 itGen.Reset();
296 TSimpleArray<TRootGenParticle> NFCentralQ;
297
298 input_particlesGEN.clear();
299 towers.clear();
300
301 // Loop over all particles in event
302 while( (particle = (TRootGenParticle*) itGen.Next()) )
303 {
304 genMomentum.SetPxPyPzE(particle->Px, particle->Py, particle->Pz, particle->E);
305
306 int pid = abs(particle->PID);
307 float eta = fabs(particle->Eta);
308
309 //input generator level particle for jet algorithm
310 if(particle->Status == 1 && eta < DET->CEN_max_calo_fwd)
311 {
312 input_particlesGEN.push_back(fastjet::PseudoJet(genMomentum.Px(),genMomentum.Py(),genMomentum.Pz(), genMomentum.E()));
313 }
314
315 //Calculate ETMIS from generated particles
316 if((pid == pNU1) || (pid == pNU2) || (pid == pNU3))PTmisGEN = PTmisGEN + genMomentum;
317
318 //Electrons and muons
319 if( (particle->Status == 1) &&
320 ((pid != pNU1) && (pid != pNU2) && (pid != pNU3)) &&
321 (fabs(particle->Eta) < DET->CEN_max_calo_fwd)
322 )
323 {
324 eta=fabs(genMomentum.Eta());
325
326 switch(pid) {
327
328 case pE: // all electrons with eta < DET->MAX_CALO_FWD
329 PairingElec(recoMomentum,genMomentum,branchElec);
330 if(recoMomentum.E()!=0){
331 elementElec=(RESOLELEC*) branchelec->NewEntry();
332 elementElec->E = genMomentum.E();
333 elementElec->SmearedE = recoMomentum.E();}
334 break; // case pE
335 case pMU: // all muons with eta < DET->MAX_MU
336 PairingMuon(recoMomentum,genMomentum,branchMuon);
337 if(recoMomentum.E()!=0){
338 elementMuon = (RESOLMUON*) branchmuon->NewEntry();
339 elementMuon->OverPT = 1./genMomentum.Pt();
340 elementMuon->OverSmearedPT = 1./recoMomentum.Pt();}
341 break; // case pMU
342 default:
343 break;
344 } // switch (pid)
345 }
346
347 } // while
348
349 //compute missing transverse energy from calo towers
350 TIter itCalo((TCollection*)branchTowers);
351 TRootCalo *calo;
352 itCalo.Reset();
353 TLorentzVector Att(0.,0.,0.,0.);
354 float ScalarEt=0;
355 while( (calo = (TRootCalo*) itCalo.Next()) )
356 {
357 if(calo->E !=0){
358 Att.SetPtEtaPhiE(calo->getET(),calo->Eta,calo->Phi,calo->E);
359 towers.push_back(Att);
360 if(fabs(Att.Eta()) < DET->CEN_max_calo_fwd)
361 {
362 ScalarEt = ScalarEt + calo->getET();
363 PTmisReco = PTmisReco + Att;
364 }
365 }
366 }
367 elementEtmis= (ETMIS*) branchetmis->NewEntry();
368 elementEtmis->Et = (PTmisGEN).Pt();
369 elementEtmis->Ex = (-PTmisGEN).Px();
370 elementEtmis->SEt = ScalarEt;
371 elementEtmis->EtSmeare = (PTmisReco).Pt()-(PTmisGEN).Pt();
372 elementEtmis->ExSmeare = (-PTmisReco).Px()-(PTmisGEN).Px();
373
374 //*****************************
375 sorted_jetsGEN=JETRUN->RunJetsResol(input_particlesGEN);
376
377 TSimpleArray<TRootGenParticle> TausHadr = TauHadr(branchGen);
378 TLorentzVector JETreco(0,0,0,0);
379 for (unsigned int i = 0; i < sorted_jetsGEN.size(); i++) {
380 TLorentzVector JETgen(0,0,0,0);
381 JETgen.SetPxPyPzE(sorted_jetsGEN[i].px(),sorted_jetsGEN[i].py(),sorted_jetsGEN[i].pz(),sorted_jetsGEN[i].E());
382 PairingJet(JETreco,JETgen,branchJet);
383 if(JETreco.Pt()>jet_pt_cut)
384 {
385 elementJet= (RESOLJET*) branchjet->NewEntry();
386 elementJet->PT = JETgen.Et();
387 elementJet->SmearedPT = JETreco.Et()/JETgen.Et();
388 elementJet->E = JETgen.E();
389 elementJet->dE = (JETreco.E()-JETgen.E())/JETgen.E() ;
390 elementJet->dE2 = pow( (JETreco.E()-JETgen.E())/JETgen.E() , 2.) ;
391 }
392 }
393 numTau = numTau+TausHadr.GetEntries();
394
395 TIter itJet((TCollection*)branchJet);
396 TRootJet *jet;
397 itJet.Reset();
398 while( (jet = (TRootJet*) itJet.Next()) )
399 {
400 TLorentzVector JETT(0,0,0,0);
401 JETT.SetPxPyPzE(jet->Px,jet->Py,jet->Pz,jet->E);
402 if(fabs(JETT.Eta()) < (DET->CEN_max_tracker - DET->TAU_track_scone))
403 {
404 for(Int_t i=0; i<TausHadr.GetEntries();i++)
405 {
406 if(DeltaR(TausHadr[i]->Phi,TausHadr[i]->Eta,JETT.Phi(),JETT.Eta())<0.1)
407 {
408 elementTaujet= (TAUHAD*) branchtaujet->NewEntry();
409 elementTaujet->EnergieCen = EnergySmallCone(towers,JETT.Eta(),JETT.Phi(),DET->TAU_energy_scone,DET->JET_seed)/JETT.E();
410 elementTaujet->NumTrack = NumTracks(branchTracks,DET->TAU_track_pt,JETT.Eta(),JETT.Phi(),DET->TAU_track_scone);
411 if( (EnergySmallCone(towers,JETT.Eta(),JETT.Phi(),DET->TAU_energy_scone,DET->JET_seed)/JETT.E()) > 0.95
412 && (NumTracks(branchTracks,DET->TAU_track_pt,JETT.Eta(),JETT.Phi(),DET->TAU_track_scone))==1)numTauRec++;
413 }
414 }
415 }
416
417
418 } // for itJet : loop on all jets
419
420 treeWriter->Fill();
421 } // Loop over all events
422 treeWriter->Write();
423
424 cout << detectorcard << " has been used.\n";
425 cout << "** Exiting..." << endl;
426
427 delete treeWriter;
428 delete treeReader;
429 delete DET;
430}
431
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