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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 --- |
6ad0bfa0 | 32 | #include "AliPHOSRecParticle.h" |
8f3968d8 | 33 | #include "AliPHOSGetter.h" |
c81ced2d | 34 | #include "AliPHOSGeometry.h" |
1212b8da | 35 | #include "AliLog.h" |
6ad0bfa0 | 36 | |
0272607d | 37 | //____________________________________________________________________________ |
43fbaae1 | 38 | AliPHOSRecParticle::AliPHOSRecParticle(): |
39 | fPHOSTrackSegment(0), | |
40 | fDebug(kFALSE), | |
41 | fPos() | |
0272607d | 42 | { |
43 | // ctor | |
304864ab | 44 | const Int_t nSPECIES = AliPID::kSPECIESN; |
88340ded | 45 | for(Int_t i = 0; i<nSPECIES ; i++) |
0272607d | 46 | fPID[i]=0.; |
47 | } | |
6ad0bfa0 | 48 | |
49 | ||
a73f33f0 | 50 | //____________________________________________________________________________ |
43fbaae1 | 51 | AliPHOSRecParticle::AliPHOSRecParticle(const AliPHOSRecParticle & rp): |
52 | AliPHOSFastRecParticle(rp), | |
53 | fPHOSTrackSegment(rp.fPHOSTrackSegment), | |
54 | fDebug(kFALSE), | |
55 | fPos() | |
a73f33f0 | 56 | { |
b2a60966 | 57 | // copy ctor |
a73f33f0 | 58 | fType = rp.fType ; |
83974468 | 59 | fIndexInList = rp.fIndexInList ; |
b2a60966 | 60 | |
cafda784 | 61 | fPdgCode = rp.fPdgCode; |
62 | fStatusCode = rp.fStatusCode; | |
63 | fMother[0] = rp.fMother[0]; | |
64 | fMother[1] = rp.fMother[1]; | |
65 | fDaughter[0] = rp.fDaughter[0]; | |
66 | fDaughter[1] = rp.fDaughter[1]; | |
67 | fWeight = rp.fWeight; | |
68 | fCalcMass = rp.fCalcMass; | |
69 | fPx = rp.fPx; | |
70 | fPy = rp.fPy; | |
71 | fPz = rp.fPz; | |
72 | fE = rp.fE; | |
73 | fVx = rp.fVx; | |
74 | fVy = rp.fVy; | |
75 | fVz = rp.fVz; | |
76 | fVt = rp.fVt; | |
77 | fPolarTheta = rp.fPolarTheta; | |
78 | fPolarPhi = rp.fPolarPhi; | |
79 | fParticlePDG = rp.fParticlePDG; | |
304864ab | 80 | const Int_t nSPECIES = AliPID::kSPECIESN; |
88340ded | 81 | for(Int_t i = 0; i<nSPECIES ; i++) |
0272607d | 82 | fPID[i]=rp.fPID[i]; |
b2a60966 | 83 | } |
83974468 | 84 | |
8f3968d8 | 85 | //____________________________________________________________________________ |
17323043 | 86 | Int_t AliPHOSRecParticle::GetNPrimaries() const |
88cb7938 | 87 | { |
88 | return -1; | |
a278df55 | 89 | } |
90 | ||
91 | //____________________________________________________________________________ | |
17323043 | 92 | Int_t AliPHOSRecParticle::GetNPrimariesToRecParticles() const |
8f3968d8 | 93 | { |
e957fea8 | 94 | // Get the number of primaries at the origine of the RecParticle |
8f3968d8 | 95 | Int_t rv = 0 ; |
88cb7938 | 96 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; |
97 | Int_t emcRPindex = dynamic_cast<AliPHOSTrackSegment*>(gime->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); | |
98 | dynamic_cast<AliPHOSEmcRecPoint*>(gime->EmcRecPoints()->At(emcRPindex))->GetPrimaries(rv) ; | |
8f3968d8 | 99 | return rv ; |
100 | } | |
83974468 | 101 | |
c81ced2d | 102 | //____________________________________________________________________________ |
103 | const TParticle * AliPHOSRecParticle::GetPrimary() const | |
104 | { | |
105 | // Get the primary particle at the origine of the RecParticle and | |
106 | // which has deposited the largest energy in SDigits | |
107 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; | |
108 | if (!gime) | |
109 | Error("GetPrimary", "Getter not yet instantiated") ; | |
110 | gime->Event(gime->EventNumber(), "SRTPX") ; | |
111 | if(GetNPrimaries() == 0) | |
112 | return 0 ; | |
113 | if(GetNPrimaries() == 1) | |
114 | return GetPrimary(0) ; | |
115 | Int_t AbsId = 0; | |
116 | Int_t module ; | |
6c8cd883 | 117 | |
118 | // Get PHOS Geometry object | |
119 | AliPHOSGeometry *geom; | |
120 | if (!(geom = AliPHOSGeometry::GetInstance())) | |
121 | geom = AliPHOSGeometry::GetInstance("IHEP",""); | |
122 | Double_t x,z ; | |
5a9ecaeb | 123 | //DP to be fixed: Why do we use this method here??? M.B. use RecPoint??? |
124 | Double_t vtx[3]={0.,0.,0.} ; | |
125 | geom->ImpactOnEmc(vtx,static_cast<double>(Theta()),static_cast<double>(Phi()), module,z,x); | |
c81ced2d | 126 | Int_t amp = 0 ; |
127 | Int_t iPrim=-1 ; | |
128 | if(module != 0){ | |
129 | geom->RelPosToAbsId(module,x,z,AbsId) ; | |
130 | TClonesArray * sdigits = gime->SDigits() ; | |
131 | AliPHOSDigit * sdig ; | |
132 | ||
133 | for(Int_t i = 0 ; i < sdigits->GetEntriesFast() ; i++){ | |
134 | sdig = static_cast<AliPHOSDigit *>(sdigits->At(i)) ; | |
135 | if((sdig->GetId() == AbsId)){ | |
136 | if((sdig->GetAmp() > amp) && (sdig->GetNprimary())){ | |
137 | amp = sdig->GetAmp() ; | |
138 | iPrim = sdig->GetPrimary(1) ; | |
139 | } | |
140 | // do not scan rest of list | |
141 | if(sdig->GetId() > AbsId) | |
142 | continue ; | |
143 | } | |
144 | } | |
145 | } | |
146 | if(iPrim >= 0) | |
147 | return gime->Primary(iPrim) ; | |
148 | else | |
149 | return 0 ; | |
150 | } | |
151 | ||
09286392 | 152 | //____________________________________________________________________________ |
eb0b1051 | 153 | Int_t AliPHOSRecParticle::GetPrimaryIndex() const |
09286392 | 154 | { |
155 | // Get the primary track index in TreeK which deposits the most energy | |
156 | // in Digits which forms EmcRecPoint, which produces TrackSegment, | |
157 | // which the RecParticle is created from | |
158 | ||
1212b8da | 159 | |
09286392 | 160 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; |
161 | if (!gime) | |
1212b8da | 162 | AliError(Form("Getter not yet instantiated")) ; |
eb0b1051 | 163 | //PH gime->Event(gime->EventNumber(), "DRTX") ; |
84294dcd | 164 | gime->Event(gime->EventNumber(), "DRT") ; |
1212b8da | 165 | |
09286392 | 166 | // Get TrackSegment corresponding to this RecParticle |
167 | AliPHOSTrackSegment *ts = gime->TrackSegment(fPHOSTrackSegment); | |
168 | ||
169 | // Get EmcRecPoint corresponding to this TrackSegment | |
170 | Int_t emcRecPointIndex = ts->GetEmcIndex(); | |
1212b8da | 171 | |
09286392 | 172 | AliPHOSEmcRecPoint *emcRecPoint = gime->EmcRecPoint(emcRecPointIndex); |
173 | ||
174 | // Get the list of digits forming this EmcRecParticle | |
175 | Int_t nDigits = emcRecPoint->GetDigitsMultiplicity(); | |
176 | Int_t *digitList = emcRecPoint->GetDigitsList(); | |
e4ca05c3 | 177 | |
09286392 | 178 | // Find the digit with maximum amplitude |
179 | AliPHOSDigit *digit = 0; | |
180 | Int_t maxAmp = 0; | |
181 | Int_t bestDigitIndex = -1; | |
182 | for (Int_t iDigit=0; iDigit<nDigits; iDigit++) { | |
1212b8da | 183 | digit = gime->Digit(digitList[iDigit]); |
09286392 | 184 | if (digit->GetAmp() > maxAmp) { |
185 | maxAmp = digit->GetAmp(); | |
186 | bestDigitIndex = iDigit; | |
187 | } | |
188 | } | |
ff309466 | 189 | if (bestDigitIndex>-1) |
190 | digit = gime->Digit(digitList[bestDigitIndex]); | |
31804400 | 191 | if (digit==0) return -12345; |
192 | ||
c48a7283 | 193 | |
09286392 | 194 | // Get the list of primary tracks producing this digit |
195 | // and find which track has more track energy. | |
c48a7283 | 196 | //Int_t nPrimary = digit->GetNprimary(); |
197 | //TParticle *track = 0; | |
198 | //Double_t energyEM = 0; | |
199 | //Double_t energyHadron = 0; | |
200 | //Int_t trackEM = -1; | |
201 | //Int_t trackHadron = -1; | |
202 | //for (Int_t iPrim=0; iPrim<nPrimary; iPrim++) { | |
203 | // Int_t iPrimary = digit->GetPrimary(iPrim+1); | |
204 | // if (iPrimary == -1 || TMath::Abs(iPrimary)>10000000) | |
205 | // continue ; //PH 10000000 is the shift of the track | |
206 | // //PH indexes in the underlying event | |
207 | // track = gime->Primary(iPrimary); | |
208 | // Int_t pdgCode = track->GetPdgCode(); | |
209 | // Double_t energy = track->Energy(); | |
210 | // if (pdgCode==22 || TMath::Abs(pdgCode)==11) { | |
211 | // if (energy > energyEM) { | |
212 | // energyEM = energy; | |
213 | // trackEM = iPrimary; | |
214 | // } | |
215 | // } | |
216 | // else { | |
217 | // if (energy > energyHadron) { | |
218 | // energyHadron = energy; | |
219 | // trackHadron = iPrimary; | |
220 | // } | |
221 | // } | |
222 | //} | |
223 | // Preferences are given to electromagnetic tracks | |
224 | //if (trackEM != -1) return trackEM; // track is gamma or e+- | |
225 | //if (trackHadron != -1) return trackHadron; // track is hadron | |
226 | //return -12345; // no track found :( | |
227 | ||
228 | ||
229 | // Get the list of hits producing this digit, | |
230 | // find which hit has deposited more energy | |
231 | // and find the primary track. | |
232 | ||
233 | AliPHOSHit *hit = 0; | |
234 | TClonesArray *hits = gime->Hits(); | |
25ed816e | 235 | if (hits==0) return -12345; |
236 | ||
c48a7283 | 237 | Double_t maxedep = 0; |
238 | Int_t maxtrack = -1; | |
239 | Int_t nHits = hits ->GetEntries(); | |
240 | Int_t id = digit->GetId(); | |
241 | ||
242 | for (Int_t iHit=0; iHit<nHits; iHit++) { | |
243 | hit = gime->Hit(iHit); | |
244 | if(hit->GetId() == id){ | |
245 | Double_t edep = hit->GetEnergy(); | |
246 | Int_t track = hit->GetPrimary(); | |
247 | if(edep > maxedep){ | |
248 | maxedep = edep; | |
249 | maxtrack = track; | |
09286392 | 250 | } |
251 | } | |
252 | } | |
c48a7283 | 253 | |
254 | if (maxtrack != -1) return maxtrack; // track is hadron | |
255 | return -12345; // no track found :( | |
09286392 | 256 | } |
257 | ||
8f3968d8 | 258 | //____________________________________________________________________________ |
259 | const TParticle * AliPHOSRecParticle::GetPrimary(Int_t index) const | |
260 | { | |
c81ced2d | 261 | // Get one of the primary particles at the origine of the RecParticle |
a278df55 | 262 | if ( index > GetNPrimariesToRecParticles() ) { |
51d189f4 | 263 | if (fDebug) |
88cb7938 | 264 | Warning("GetPrimary", "AliPHOSRecParticle::GetPrimary -> %d is larger that the number of primaries %d", |
265 | index, GetNPrimaries()) ; | |
266 | return 0 ; | |
51d189f4 | 267 | } |
88cb7938 | 268 | else { |
269 | Int_t dummy ; | |
270 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; | |
271 | ||
272 | Int_t emcRPindex = dynamic_cast<AliPHOSTrackSegment*>(gime->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); | |
273 | Int_t primaryindex = dynamic_cast<AliPHOSEmcRecPoint*>(gime->EmcRecPoints()->At(emcRPindex))->GetPrimaries(dummy)[index] ; | |
274 | return gime->Primary(primaryindex) ; | |
275 | } | |
fc7e2f43 | 276 | // return 0 ; |
8f3968d8 | 277 | } |
948a4b24 | 278 | |
06e774ed | 279 | //____________________________________________________________________________ |
85c60a8e | 280 | void AliPHOSRecParticle::SetPID(Int_t type, Float_t weight) |
06e774ed | 281 | { |
cc1fe362 | 282 | // Set the probability densities that this reconstructed particle |
06e774ed | 283 | // has a type of i: |
284 | // i particle types | |
285 | // ---------------------- | |
286 | // 0 electron | |
287 | // 1 muon | |
288 | // 2 pi+- | |
289 | // 3 K+- | |
290 | // 4 p/pbar | |
291 | // 5 photon | |
292 | // 6 pi0 at high pt | |
293 | // 7 neutron | |
294 | // 8 K0L | |
cc1fe362 | 295 | // 9 Conversion electron |
296 | ||
297 | fPID[type] = weight ; | |
06e774ed | 298 | } |