]>
Commit | Line | Data |
---|---|---|
d89b8229 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | //-------------------------------------------------- | |
19 | // Filling of CalTrkTrack objects in the MC reader task | |
20 | // | |
21 | // Author: magali.estienne@subatech.in2p3.fr | |
22 | // alexandre.shabetai@cern.ch | |
23 | //------------------------------------------------- | |
24 | ||
25 | // --- ROOT system --- | |
26 | #include <TDatabasePDG.h> | |
27 | #include <TRandom.h> | |
28 | #include <TPDGCode.h> | |
29 | ||
30 | // --- AliRoot system --- | |
31 | #include "AliJetFillCalTrkTrackMC.h" | |
32 | #include "AliAODMCParticle.h" | |
33 | #include "AliJetKineReaderHeader.h" | |
34 | #include "AliVEvent.h" | |
35 | #include "AliMCEvent.h" | |
36 | ||
37 | ClassImp(AliJetFillCalTrkTrackMC) | |
38 | ||
39 | ///////////////////////////////////////////////////////////////////////// | |
40 | ||
41 | AliJetFillCalTrkTrackMC::AliJetFillCalTrkTrackMC(): | |
42 | AliJetFillCalTrkEvent(), | |
43 | fHadCorr(0), | |
44 | fApplyMIPCorrection(kTRUE), | |
45 | fVEvt(0x0), | |
46 | fMCEvent(0x0) | |
47 | { | |
48 | // constructor | |
49 | } | |
50 | ||
51 | //----------------------------------------------------------------------- | |
52 | AliJetFillCalTrkTrackMC::AliJetFillCalTrkTrackMC(AliVEvent* evt): | |
53 | AliJetFillCalTrkEvent(), | |
54 | fHadCorr(0), | |
55 | fApplyMIPCorrection(kTRUE), | |
56 | fVEvt(evt), | |
57 | fMCEvent(0x0) | |
58 | { | |
59 | // constructor | |
60 | } | |
61 | ||
62 | //----------------------------------------------------------------------- | |
63 | AliJetFillCalTrkTrackMC::AliJetFillCalTrkTrackMC(const AliJetFillCalTrkTrackMC &det): | |
64 | AliJetFillCalTrkEvent(det), | |
65 | fHadCorr(det.fHadCorr), | |
66 | fApplyMIPCorrection(det.fApplyMIPCorrection), | |
67 | fVEvt(det.fVEvt), | |
68 | fMCEvent(det.fMCEvent) | |
69 | { | |
70 | // Copy constructor | |
71 | } | |
72 | ||
73 | //----------------------------------------------------------------------- | |
74 | AliJetFillCalTrkTrackMC& AliJetFillCalTrkTrackMC::operator=(const AliJetFillCalTrkTrackMC& other) | |
75 | { | |
76 | // Assignment | |
77 | if (this != &other) { | |
78 | fHadCorr = other.fHadCorr; | |
79 | fApplyMIPCorrection = other.fApplyMIPCorrection; | |
80 | fVEvt = other.fVEvt; | |
81 | fMCEvent = other.fMCEvent; | |
82 | } | |
83 | ||
84 | return (*this); | |
85 | ||
86 | } | |
87 | ||
88 | //----------------------------------------------------------------------- | |
89 | AliJetFillCalTrkTrackMC::~AliJetFillCalTrkTrackMC() | |
90 | { | |
91 | // destructor | |
92 | } | |
93 | ||
94 | //----------------------------------------------------------------------- | |
95 | void AliJetFillCalTrkTrackMC::Exec(Option_t* const /*option*/) | |
96 | { | |
97 | // Main method. | |
98 | // Fill AliJetFillCalTrkTrackMC the with the charged particle information | |
99 | ||
100 | fDebug = fReaderHeader->GetDebug(); | |
101 | fOpt = fReaderHeader->GetDetector(); | |
102 | TString datatype = fReaderHeader->GetDataType(); | |
103 | datatype.ToUpper(); | |
104 | ||
105 | Int_t type=0; | |
106 | ||
107 | if (datatype.Contains("AODMC2B")) { type=kTrackAODMCChargedAcceptance; } | |
108 | else if (datatype.Contains("AODMC2")) { type=kTrackAODMCCharged; } | |
109 | else if (datatype.Contains("AODMC")) { type=kTrackAODMCAll; } | |
110 | ||
111 | else if (!datatype.Contains("AOD") && datatype.Contains("MC2")) {type=kTrackKineCharged;} | |
112 | else if (!datatype.Contains("AOD") && datatype.Contains("MC")) {type=kTrackKineAll;} | |
113 | ||
114 | else { cout<< "Unknown Data type !" << endl; } | |
115 | ||
116 | // temporary storage of signal and pt cut flag | |
117 | Bool_t sflag = 0; | |
118 | Bool_t cflag = 0; | |
119 | ||
120 | // get cuts set by user | |
121 | Float_t ptMin = fReaderHeader->GetPtCut(); | |
122 | Float_t etaMin = fReaderHeader->GetFiducialEtaMin(); | |
123 | Float_t etaMax = fReaderHeader->GetFiducialEtaMax(); | |
124 | Float_t phiMin = fReaderHeader->GetFiducialPhiMin(); | |
125 | Float_t phiMax = fReaderHeader->GetFiducialPhiMax(); | |
126 | ||
127 | if(fDebug>2) Printf("%s:%d Selecting tracks with %d",(char*)__FILE__,__LINE__,type); | |
128 | ||
129 | Int_t goodTrackStd = 0; | |
130 | Int_t goodTrackNonStd = 0; | |
131 | ||
132 | if (type == kTrackKineAll || type == kTrackKineCharged){ | |
133 | ||
134 | FillKine(); | |
135 | } // Kine | |
136 | ||
137 | else if (type == kTrackAODMCCharged || type == kTrackAODMCAll || type == kTrackAODMCChargedAcceptance) { | |
138 | if(!fVEvt) return; | |
139 | TClonesArray *mcArray = dynamic_cast<TClonesArray*>(fVEvt->FindListObject(AliAODMCParticle::StdBranchName())); | |
140 | if(!mcArray) { | |
141 | Printf("%s:%d No MC particle branch found",(char*)__FILE__,__LINE__); | |
142 | return; | |
143 | } | |
144 | for(int it = 0;it < mcArray->GetEntriesFast();++it){ | |
145 | cflag=sflag=0; | |
146 | AliAODMCParticle *part = (AliAODMCParticle*)(mcArray->At(it)); | |
147 | if(!part->IsPhysicalPrimary())continue; | |
148 | Int_t pdg = TMath::Abs(part->GetPdgCode()); | |
149 | // exclude neutrinos anyway | |
150 | if((pdg == 12 || pdg == 14 || pdg == 16)) continue; | |
151 | cflag = ( part->Pt()>ptMin ) ? 1 : 0; | |
152 | sflag = ( TMath::Abs(part->GetLabel()) < 10000 ) ? 1 : 0; | |
153 | if(type == kTrackAODMCAll){ | |
154 | fCalTrkEvent->AddCalTrkTrack(part,cflag,sflag); | |
155 | goodTrackStd++; | |
156 | } | |
157 | else if (type == kTrackAODMCCharged || type == kTrackAODMCChargedAcceptance ){ | |
158 | if(part->Charge()==0)continue; | |
159 | if(kTrackAODMCCharged){ | |
160 | fCalTrkEvent->AddCalTrkTrack(part,cflag,sflag); | |
161 | goodTrackStd++; | |
162 | } | |
163 | else { | |
164 | if((part->Eta()>etaMax) || (part->Eta()<etaMin)) continue; | |
165 | Float_t phi = ( (part->Phi()) < 0) ? (part->Phi()) + 2. * TMath::Pi() : (part->Phi()); | |
166 | if((phi>phiMax) || (phi<phiMin)) continue; | |
167 | fCalTrkEvent->AddCalTrkTrack(part,cflag,sflag); | |
168 | goodTrackStd++; | |
169 | } | |
170 | } | |
171 | } | |
172 | if(fDebug>0) printf("Number of good tracks selected: %5d \n", goodTrackStd+goodTrackNonStd); | |
173 | } // AODMCparticle | |
174 | ||
175 | } | |
176 | ||
177 | //----------------------------------------------------------------------- | |
178 | Bool_t AliJetFillCalTrkTrackMC::FillKine() | |
179 | { | |
180 | // Fill event | |
181 | Int_t goodTrack = 0; | |
182 | ||
183 | // Get the stack | |
184 | if(!fMCEvent) {cout<<"could not get MCEvent!"<<endl; return kFALSE;} | |
185 | ||
186 | Int_t nt = fMCEvent->GetNumberOfTracks(); | |
187 | ||
188 | // Get cuts set by user and header | |
189 | Double_t ptMin = ((AliJetKineReaderHeader*) fReaderHeader)->GetPtCut(); | |
190 | Float_t etaMin = fReaderHeader->GetFiducialEtaMin(); | |
191 | Float_t etaMax = fReaderHeader->GetFiducialEtaMax(); | |
192 | ||
193 | TLorentzVector p4; | |
194 | // Loop over particles | |
195 | for (Int_t it = 0; it < nt; it++) { | |
196 | if(!fMCEvent->IsPhysicalPrimary(it)) continue; | |
197 | AliVParticle* part = fMCEvent->GetTrack(it); | |
198 | Int_t pdg = TMath::Abs(part->PdgCode()); | |
199 | Float_t pt = part->Pt(); | |
200 | ||
201 | if( (pdg == 12 || pdg == 14 || pdg == 16)) continue; | |
202 | ||
203 | Float_t p = part->P(); | |
204 | Float_t p0 = p; | |
205 | Float_t eta = part->Eta(); | |
206 | Float_t phi = part->Phi(); | |
207 | Float_t charge = part->Charge(); | |
208 | ||
209 | if (((AliJetKineReaderHeader*)fReaderHeader)->ChargedOnly()) { | |
210 | if (charge == 0) continue; | |
211 | } // End charged only | |
212 | ||
213 | // Fast simulation of EMCAL if requested | |
214 | if (((AliJetKineReaderHeader*)fReaderHeader)->FastSimEMCAL()) { | |
215 | // Charged particles only | |
216 | if (charge != 0){ | |
217 | // Simulate efficiency | |
218 | if (!Efficiency(p0, eta, phi)) continue; | |
219 | // Simulate resolution | |
220 | p = SmearMomentum(4, p0); | |
221 | } // end "if" charged particles | |
222 | // Neutral particles (exclude K0L, n, nbar) | |
223 | if (pdg == kNeutron || pdg == kK0Long) continue; | |
224 | } // End fast EMCAL | |
225 | ||
226 | // Fast simulation of TPC if requested | |
227 | if (((AliJetKineReaderHeader*)fReaderHeader)->FastSimTPC()) { | |
228 | // Charged particles only | |
229 | if (charge == 0) continue; | |
230 | // Simulate efficiency | |
231 | if (!Efficiency(p0, eta, phi)) continue; | |
232 | // Simulate resolution | |
233 | p = SmearMomentum(4, p0); | |
234 | } // End fast TPC | |
235 | ||
236 | // Fill momentum array | |
237 | Float_t r = p/p0; | |
238 | Float_t px = r * part->Px(); | |
239 | Float_t py = r * part->Py(); | |
240 | Float_t pz = r * part->Pz(); | |
241 | Float_t m = part->M(); | |
242 | ||
243 | Float_t e = TMath::Sqrt(px * px + py * py + pz * pz + m * m); | |
244 | p4 = TLorentzVector(px, py, pz, e); | |
245 | if ((p4.Eta()>etaMax) || (p4.Eta()<etaMin)) continue; | |
246 | ||
247 | // Flag used to store the r factor | |
248 | Float_t ptReso = r; | |
249 | Bool_t cflag = kFALSE, sflag = kTRUE; | |
250 | if (pt > ptMin) cflag = kTRUE; // track surviving pt cut | |
251 | ||
252 | fCalTrkEvent->AddCalTrkTrackKine(part,cflag,sflag,ptReso); | |
253 | ||
254 | goodTrack++; | |
255 | ||
256 | } // track loop | |
257 | ||
258 | if(fDebug>0) printf(" Number of good tracks %d \n", goodTrack); | |
259 | ||
260 | return kTRUE; | |
261 | ||
262 | } | |
263 | ||
264 | //----------------------------------------------------------------------- | |
265 | Float_t AliJetFillCalTrkTrackMC::SmearMomentum(Int_t ind, Float_t p) | |
266 | { | |
267 | // The relative momentum error, i.e. | |
268 | // (delta p)/p = sqrt (a**2 + (b*p)**2) * 10**-2, | |
269 | // where typically a = 0.75 and b = 0.16 - 0.24 depending on multiplicity | |
270 | // (the lower value is for dn/d(eta) about 2000, and the higher one for 8000) | |
271 | // | |
272 | // If we include information from TRD, b will be a factor 2/3 smaller. | |
273 | // | |
274 | // ind = 1: high multiplicity | |
275 | // ind = 2: low multiplicity | |
276 | // ind = 3: high multiplicity + TRD | |
277 | // ind = 4: low multiplicity + TRD | |
278 | ||
279 | Float_t pSmeared; | |
280 | Float_t a = 0.75; | |
281 | Float_t b = 0.12; | |
282 | ||
283 | if (ind == 1) b = 0.12; | |
284 | if (ind == 2) b = 0.08; | |
285 | if (ind == 3) b = 0.12; | |
286 | if (ind == 4) b = 0.08; | |
287 | ||
288 | Float_t sigma = p * TMath::Sqrt(a * a + b * b * p * p)*0.01; | |
289 | pSmeared = p + gRandom->Gaus(0., sigma); | |
290 | return pSmeared; | |
291 | ||
292 | } | |
293 | ||
294 | //----------------------------------------------------------------------- | |
295 | Bool_t AliJetFillCalTrkTrackMC::Efficiency(Float_t p, Float_t /*eta*/, Float_t phi) | |
296 | { | |
297 | // Fast simulation of geometrical acceptance and tracking efficiency | |
298 | ||
299 | // Tracking | |
300 | Float_t eff = 0.99; | |
301 | if (p < 0.5) eff -= (0.5-p)*0.2/0.3; | |
302 | // Geometry | |
303 | if (p > 0.5) { | |
304 | phi *= 180. / TMath::Pi(); | |
305 | // Sector number 0 - 17 | |
306 | Int_t isec = Int_t(phi / 20.); | |
307 | // Sector centre | |
308 | Float_t phi0 = isec * 20. + 10.; | |
309 | Float_t phir = TMath::Abs(phi-phi0); | |
310 | // 2 deg of dead space | |
311 | if (phir > 9.) eff = 0.; | |
312 | } | |
313 | ||
314 | if (gRandom->Rndm() > eff) { | |
315 | return kFALSE; | |
316 | } else { | |
317 | return kTRUE; | |
318 | } | |
319 | ||
320 | } | |
321 | ||
322 |