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6ad0bfa0 | 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 | **************************************************************************/ | |
b2a60966 | 15 | /* $Id$ */ |
6ad0bfa0 | 16 | //_________________________________________________________________________ |
b2a60966 | 17 | // A Reconstructed Particle in PHOS |
2f04ed65 | 18 | // To become a general class of AliRoot ? |
19 | // Why should I put meaningless comments | |
20 | // just to satisfy | |
21 | // the code checker | |
b2a60966 | 22 | // |
23 | //*-- Author: Yves Schutz (SUBATECH) | |
24 | ||
6ad0bfa0 | 25 | |
26 | // --- ROOT system --- | |
27 | ||
28 | // --- Standard library --- | |
29 | ||
ed4205d8 | 30 | |
6ad0bfa0 | 31 | // --- AliRoot header files --- |
7fb9892d | 32 | #include "AliStack.h" |
33 | #include "AliPHOSHit.h" | |
34 | #include "AliPHOSDigit.h" | |
35 | #include "AliPHOSTrackSegment.h" | |
36 | #include "AliPHOSEmcRecPoint.h" | |
6ad0bfa0 | 37 | #include "AliPHOSRecParticle.h" |
7fb9892d | 38 | #include "AliPHOSLoader.h" |
c81ced2d | 39 | #include "AliPHOSGeometry.h" |
1212b8da | 40 | #include "AliLog.h" |
6ad0bfa0 | 41 | |
0272607d | 42 | //____________________________________________________________________________ |
43fbaae1 | 43 | AliPHOSRecParticle::AliPHOSRecParticle(): |
44 | fPHOSTrackSegment(0), | |
45 | fDebug(kFALSE), | |
46 | fPos() | |
0272607d | 47 | { |
48 | // ctor | |
304864ab | 49 | const Int_t nSPECIES = AliPID::kSPECIESN; |
88340ded | 50 | for(Int_t i = 0; i<nSPECIES ; i++) |
0272607d | 51 | fPID[i]=0.; |
52 | } | |
6ad0bfa0 | 53 | |
54 | ||
a73f33f0 | 55 | //____________________________________________________________________________ |
43fbaae1 | 56 | AliPHOSRecParticle::AliPHOSRecParticle(const AliPHOSRecParticle & rp): |
57 | AliPHOSFastRecParticle(rp), | |
58 | fPHOSTrackSegment(rp.fPHOSTrackSegment), | |
59 | fDebug(kFALSE), | |
60 | fPos() | |
a73f33f0 | 61 | { |
b2a60966 | 62 | // copy ctor |
a73f33f0 | 63 | fType = rp.fType ; |
83974468 | 64 | fIndexInList = rp.fIndexInList ; |
b2a60966 | 65 | |
cafda784 | 66 | fPdgCode = rp.fPdgCode; |
67 | fStatusCode = rp.fStatusCode; | |
68 | fMother[0] = rp.fMother[0]; | |
69 | fMother[1] = rp.fMother[1]; | |
70 | fDaughter[0] = rp.fDaughter[0]; | |
71 | fDaughter[1] = rp.fDaughter[1]; | |
72 | fWeight = rp.fWeight; | |
73 | fCalcMass = rp.fCalcMass; | |
74 | fPx = rp.fPx; | |
75 | fPy = rp.fPy; | |
76 | fPz = rp.fPz; | |
77 | fE = rp.fE; | |
78 | fVx = rp.fVx; | |
79 | fVy = rp.fVy; | |
80 | fVz = rp.fVz; | |
81 | fVt = rp.fVt; | |
82 | fPolarTheta = rp.fPolarTheta; | |
83 | fPolarPhi = rp.fPolarPhi; | |
84 | fParticlePDG = rp.fParticlePDG; | |
304864ab | 85 | const Int_t nSPECIES = AliPID::kSPECIESN; |
88340ded | 86 | for(Int_t i = 0; i<nSPECIES ; i++) |
0272607d | 87 | fPID[i]=rp.fPID[i]; |
b2a60966 | 88 | } |
83974468 | 89 | |
6c8ba828 | 90 | //____________________________________________________________________________ |
91 | AliPHOSRecParticle & AliPHOSRecParticle::operator = (const AliPHOSRecParticle &) | |
92 | { | |
93 | Fatal("operator =", "not implemented"); | |
94 | return *this; | |
95 | } | |
96 | ||
8f3968d8 | 97 | //____________________________________________________________________________ |
17323043 | 98 | Int_t AliPHOSRecParticle::GetNPrimaries() const |
88cb7938 | 99 | { |
100 | return -1; | |
a278df55 | 101 | } |
102 | ||
103 | //____________________________________________________________________________ | |
17323043 | 104 | Int_t AliPHOSRecParticle::GetNPrimariesToRecParticles() const |
8f3968d8 | 105 | { |
e957fea8 | 106 | // Get the number of primaries at the origine of the RecParticle |
8f3968d8 | 107 | Int_t rv = 0 ; |
33c3c91a | 108 | AliRunLoader* rl = AliRunLoader::Instance() ; |
09828f52 | 109 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); |
110 | Int_t emcRPindex = static_cast<AliPHOSTrackSegment*>(phosLoader->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); | |
111 | static_cast<AliPHOSEmcRecPoint*>(phosLoader->EmcRecPoints()->At(emcRPindex))->GetPrimaries(rv) ; | |
8f3968d8 | 112 | return rv ; |
113 | } | |
83974468 | 114 | |
c81ced2d | 115 | //____________________________________________________________________________ |
116 | const TParticle * AliPHOSRecParticle::GetPrimary() const | |
117 | { | |
118 | // Get the primary particle at the origine of the RecParticle and | |
119 | // which has deposited the largest energy in SDigits | |
33c3c91a | 120 | AliRunLoader* rl = AliRunLoader::Instance() ; |
09828f52 | 121 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); |
7fb9892d | 122 | rl->GetEvent(rl->GetEventNumber()) ; |
123 | rl->LoadKinematics("READ"); | |
124 | rl->LoadSDigits("READ"); | |
125 | ||
c81ced2d | 126 | if(GetNPrimaries() == 0) |
127 | return 0 ; | |
128 | if(GetNPrimaries() == 1) | |
129 | return GetPrimary(0) ; | |
130 | Int_t AbsId = 0; | |
131 | Int_t module ; | |
6c8cd883 | 132 | |
133 | // Get PHOS Geometry object | |
134 | AliPHOSGeometry *geom; | |
135 | if (!(geom = AliPHOSGeometry::GetInstance())) | |
136 | geom = AliPHOSGeometry::GetInstance("IHEP",""); | |
137 | Double_t x,z ; | |
5a9ecaeb | 138 | //DP to be fixed: Why do we use this method here??? M.B. use RecPoint??? |
139 | Double_t vtx[3]={0.,0.,0.} ; | |
140 | geom->ImpactOnEmc(vtx,static_cast<double>(Theta()),static_cast<double>(Phi()), module,z,x); | |
c81ced2d | 141 | Int_t amp = 0 ; |
142 | Int_t iPrim=-1 ; | |
143 | if(module != 0){ | |
144 | geom->RelPosToAbsId(module,x,z,AbsId) ; | |
7fb9892d | 145 | TClonesArray * sdigits = phosLoader->SDigits() ; |
c81ced2d | 146 | AliPHOSDigit * sdig ; |
147 | ||
148 | for(Int_t i = 0 ; i < sdigits->GetEntriesFast() ; i++){ | |
149 | sdig = static_cast<AliPHOSDigit *>(sdigits->At(i)) ; | |
150 | if((sdig->GetId() == AbsId)){ | |
151 | if((sdig->GetAmp() > amp) && (sdig->GetNprimary())){ | |
152 | amp = sdig->GetAmp() ; | |
153 | iPrim = sdig->GetPrimary(1) ; | |
154 | } | |
155 | // do not scan rest of list | |
156 | if(sdig->GetId() > AbsId) | |
157 | continue ; | |
158 | } | |
159 | } | |
160 | } | |
161 | if(iPrim >= 0) | |
7fb9892d | 162 | return rl->Stack()->Particle(iPrim) ; |
c81ced2d | 163 | else |
164 | return 0 ; | |
165 | } | |
166 | ||
09286392 | 167 | //____________________________________________________________________________ |
eb0b1051 | 168 | Int_t AliPHOSRecParticle::GetPrimaryIndex() const |
09286392 | 169 | { |
170 | // Get the primary track index in TreeK which deposits the most energy | |
171 | // in Digits which forms EmcRecPoint, which produces TrackSegment, | |
172 | // which the RecParticle is created from | |
173 | ||
1212b8da | 174 | |
33c3c91a | 175 | AliRunLoader* rl = AliRunLoader::Instance() ; |
09828f52 | 176 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); |
7fb9892d | 177 | rl->GetEvent(rl->GetEventNumber()) ; |
178 | rl->LoadHits("READ"); | |
179 | rl->LoadDigits("READ"); | |
180 | rl->LoadRecPoints("READ"); | |
181 | rl->LoadTracks("READ"); | |
1212b8da | 182 | |
09286392 | 183 | // Get TrackSegment corresponding to this RecParticle |
7fb9892d | 184 | const AliPHOSTrackSegment *ts = phosLoader->TrackSegment(fPHOSTrackSegment); |
09286392 | 185 | |
186 | // Get EmcRecPoint corresponding to this TrackSegment | |
187 | Int_t emcRecPointIndex = ts->GetEmcIndex(); | |
1212b8da | 188 | |
7fb9892d | 189 | const AliPHOSEmcRecPoint *emcRecPoint = phosLoader->EmcRecPoint(emcRecPointIndex); |
09286392 | 190 | |
191 | // Get the list of digits forming this EmcRecParticle | |
192 | Int_t nDigits = emcRecPoint->GetDigitsMultiplicity(); | |
193 | Int_t *digitList = emcRecPoint->GetDigitsList(); | |
e4ca05c3 | 194 | |
09286392 | 195 | // Find the digit with maximum amplitude |
09286392 | 196 | Int_t maxAmp = 0; |
197 | Int_t bestDigitIndex = -1; | |
198 | for (Int_t iDigit=0; iDigit<nDigits; iDigit++) { | |
7fb9892d | 199 | const AliPHOSDigit * digit = phosLoader->Digit(digitList[iDigit]); |
09286392 | 200 | if (digit->GetAmp() > maxAmp) { |
201 | maxAmp = digit->GetAmp(); | |
202 | bestDigitIndex = iDigit; | |
203 | } | |
204 | } | |
7fb9892d | 205 | if (bestDigitIndex>-1) { |
206 | const AliPHOSDigit * digit = phosLoader->Digit(digitList[bestDigitIndex]); | |
207 | if (digit==0) return -12345; | |
208 | } | |
c48a7283 | 209 | |
09286392 | 210 | // Get the list of primary tracks producing this digit |
211 | // and find which track has more track energy. | |
c48a7283 | 212 | //Int_t nPrimary = digit->GetNprimary(); |
213 | //TParticle *track = 0; | |
214 | //Double_t energyEM = 0; | |
215 | //Double_t energyHadron = 0; | |
216 | //Int_t trackEM = -1; | |
217 | //Int_t trackHadron = -1; | |
218 | //for (Int_t iPrim=0; iPrim<nPrimary; iPrim++) { | |
219 | // Int_t iPrimary = digit->GetPrimary(iPrim+1); | |
220 | // if (iPrimary == -1 || TMath::Abs(iPrimary)>10000000) | |
221 | // continue ; //PH 10000000 is the shift of the track | |
222 | // //PH indexes in the underlying event | |
223 | // track = gime->Primary(iPrimary); | |
224 | // Int_t pdgCode = track->GetPdgCode(); | |
225 | // Double_t energy = track->Energy(); | |
226 | // if (pdgCode==22 || TMath::Abs(pdgCode)==11) { | |
227 | // if (energy > energyEM) { | |
228 | // energyEM = energy; | |
229 | // trackEM = iPrimary; | |
230 | // } | |
231 | // } | |
232 | // else { | |
233 | // if (energy > energyHadron) { | |
234 | // energyHadron = energy; | |
235 | // trackHadron = iPrimary; | |
236 | // } | |
237 | // } | |
238 | //} | |
239 | // Preferences are given to electromagnetic tracks | |
240 | //if (trackEM != -1) return trackEM; // track is gamma or e+- | |
241 | //if (trackHadron != -1) return trackHadron; // track is hadron | |
242 | //return -12345; // no track found :( | |
243 | ||
244 | ||
245 | // Get the list of hits producing this digit, | |
246 | // find which hit has deposited more energy | |
247 | // and find the primary track. | |
248 | ||
7fb9892d | 249 | TClonesArray *hits = phosLoader->Hits(); |
25ed816e | 250 | if (hits==0) return -12345; |
251 | ||
c48a7283 | 252 | Double_t maxedep = 0; |
253 | Int_t maxtrack = -1; | |
254 | Int_t nHits = hits ->GetEntries(); | |
7fb9892d | 255 | Int_t id = (phosLoader->Digit(digitList[bestDigitIndex]))->GetId(); |
c48a7283 | 256 | |
257 | for (Int_t iHit=0; iHit<nHits; iHit++) { | |
7fb9892d | 258 | const AliPHOSHit * hit = phosLoader->Hit(iHit); |
c48a7283 | 259 | if(hit->GetId() == id){ |
260 | Double_t edep = hit->GetEnergy(); | |
261 | Int_t track = hit->GetPrimary(); | |
262 | if(edep > maxedep){ | |
263 | maxedep = edep; | |
264 | maxtrack = track; | |
09286392 | 265 | } |
266 | } | |
267 | } | |
c48a7283 | 268 | |
269 | if (maxtrack != -1) return maxtrack; // track is hadron | |
270 | return -12345; // no track found :( | |
09286392 | 271 | } |
272 | ||
8f3968d8 | 273 | //____________________________________________________________________________ |
274 | const TParticle * AliPHOSRecParticle::GetPrimary(Int_t index) const | |
275 | { | |
c81ced2d | 276 | // Get one of the primary particles at the origine of the RecParticle |
a278df55 | 277 | if ( index > GetNPrimariesToRecParticles() ) { |
51d189f4 | 278 | if (fDebug) |
88cb7938 | 279 | Warning("GetPrimary", "AliPHOSRecParticle::GetPrimary -> %d is larger that the number of primaries %d", |
280 | index, GetNPrimaries()) ; | |
281 | return 0 ; | |
51d189f4 | 282 | } |
88cb7938 | 283 | else { |
284 | Int_t dummy ; | |
33c3c91a | 285 | AliRunLoader* rl = AliRunLoader::Instance() ; |
09828f52 | 286 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); |
88cb7938 | 287 | |
09828f52 | 288 | Int_t emcRPindex = static_cast<AliPHOSTrackSegment*>(phosLoader->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); |
289 | Int_t primaryindex = static_cast<AliPHOSEmcRecPoint*>(phosLoader->EmcRecPoints()->At(emcRPindex))->GetPrimaries(dummy)[index] ; | |
7fb9892d | 290 | return rl->Stack()->Particle(primaryindex) ; |
88cb7938 | 291 | } |
fc7e2f43 | 292 | // return 0 ; |
8f3968d8 | 293 | } |
948a4b24 | 294 | |
06e774ed | 295 | //____________________________________________________________________________ |
85c60a8e | 296 | void AliPHOSRecParticle::SetPID(Int_t type, Float_t weight) |
06e774ed | 297 | { |
cc1fe362 | 298 | // Set the probability densities that this reconstructed particle |
06e774ed | 299 | // has a type of i: |
300 | // i particle types | |
301 | // ---------------------- | |
302 | // 0 electron | |
303 | // 1 muon | |
304 | // 2 pi+- | |
305 | // 3 K+- | |
306 | // 4 p/pbar | |
307 | // 5 photon | |
308 | // 6 pi0 at high pt | |
309 | // 7 neutron | |
310 | // 8 K0L | |
cc1fe362 | 311 | // 9 Conversion electron |
312 | ||
313 | fPID[type] = weight ; | |
06e774ed | 314 | } |