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820b4d9e | 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 | //==================================================================================================================================================== | |
17 | // | |
18 | // Description of an ALICE muon forward track, combining the information of the Muon Spectrometer and the Muon Forward Tracker | |
19 | // | |
20 | // Contact author: antonio.uras@cern.ch | |
21 | // | |
22 | //==================================================================================================================================================== | |
23 | ||
24 | #include "AliLog.h" | |
25 | #include "AliMUONTrack.h" | |
26 | #include "AliMFTCluster.h" | |
27 | #include "AliMUONVCluster.h" | |
28 | #include "AliMUONTrackParam.h" | |
29 | #include "AliMUONTrackExtrap.h" | |
30 | #include "TClonesArray.h" | |
31 | #include "TMatrixD.h" | |
32 | #include "TParticle.h" | |
33 | #include "AliMuonForwardTrack.h" | |
d4643a10 | 34 | #include "AliMFTConstants.h" |
ec7c7172 | 35 | #include "TLorentzVector.h" |
36 | #include "TDatabasePDG.h" | |
94bd88d5 | 37 | #include "AliMUONConstants.h" |
820b4d9e | 38 | |
39 | ClassImp(AliMuonForwardTrack) | |
40 | ||
41 | //==================================================================================================================================================== | |
42 | ||
43 | AliMuonForwardTrack::AliMuonForwardTrack(): | |
44 | AliMUONTrack(), | |
45 | fMUONTrack(0), | |
46 | fMCTrackRef(0), | |
d4643a10 | 47 | fMFTClusters(0), |
7e3dd1af | 48 | fNWrongClustersMC(-1), |
ec7c7172 | 49 | fTrackMCId(-1), |
50 | fKinem(0,0,0,0), | |
026547c6 | 51 | fParamCovMatrix(5,5), |
52 | fRAtAbsorberEnd(0) | |
820b4d9e | 53 | { |
54 | ||
55 | // default constructor | |
d4643a10 | 56 | |
57 | for (Int_t iPlane=0; iPlane<AliMFTConstants::fNMaxPlanes; iPlane++) fPlaneExists[iPlane] = kFALSE; | |
58 | for (Int_t iParent=0; iParent<fgkNParentsMax; iParent++) { | |
59 | fParentMCLabel[iParent] = -1; | |
60 | fParentPDGCode[iParent] = 0; | |
61 | } | |
820b4d9e | 62 | fMFTClusters = new TClonesArray("AliMFTCluster"); |
274c2dce | 63 | fMFTClusters -> SetOwner(kTRUE); |
820b4d9e | 64 | |
65 | } | |
66 | ||
67 | //==================================================================================================================================================== | |
68 | ||
69 | AliMuonForwardTrack::AliMuonForwardTrack(AliMUONTrack *MUONTrack): | |
70 | AliMUONTrack(), | |
71 | fMUONTrack(0), | |
72 | fMCTrackRef(0), | |
d4643a10 | 73 | fMFTClusters(0), |
7e3dd1af | 74 | fNWrongClustersMC(-1), |
ec7c7172 | 75 | fTrackMCId(-1), |
76 | fKinem(0,0,0,0), | |
026547c6 | 77 | fParamCovMatrix(5,5), |
78 | fRAtAbsorberEnd(0) | |
820b4d9e | 79 | { |
80 | ||
81 | SetMUONTrack(MUONTrack); | |
d4643a10 | 82 | for (Int_t iPlane=0; iPlane<AliMFTConstants::fNMaxPlanes; iPlane++) fPlaneExists[iPlane] = kFALSE; |
83 | for (Int_t iParent=0; iParent<fgkNParentsMax; iParent++) { | |
84 | fParentMCLabel[iParent] = -1; | |
85 | fParentPDGCode[iParent] = 0; | |
86 | } | |
820b4d9e | 87 | fMFTClusters = new TClonesArray("AliMFTCluster"); |
274c2dce | 88 | fMFTClusters -> SetOwner(kTRUE); |
820b4d9e | 89 | |
90 | } | |
91 | ||
92 | //==================================================================================================================================================== | |
93 | ||
94 | AliMuonForwardTrack::AliMuonForwardTrack(const AliMuonForwardTrack& track): | |
95 | AliMUONTrack(track), | |
d4643a10 | 96 | fMUONTrack(0x0), |
97 | fMCTrackRef(0x0), | |
98 | fMFTClusters(0x0), | |
7e3dd1af | 99 | fNWrongClustersMC(track.fNWrongClustersMC), |
ec7c7172 | 100 | fTrackMCId(track.fTrackMCId), |
101 | fKinem(track.fKinem), | |
026547c6 | 102 | fParamCovMatrix(track.fParamCovMatrix), |
103 | fRAtAbsorberEnd(track.fRAtAbsorberEnd) | |
820b4d9e | 104 | { |
105 | ||
106 | // copy constructor | |
d4643a10 | 107 | fMUONTrack = new AliMUONTrack(*(track.fMUONTrack)); |
108 | if (track.fMCTrackRef) fMCTrackRef = new TParticle(*(track.fMCTrackRef)); | |
109 | fMFTClusters = new TClonesArray(*(track.fMFTClusters)); | |
274c2dce | 110 | fMFTClusters->SetOwner(kTRUE); |
d4643a10 | 111 | for (Int_t iPlane=0; iPlane<AliMFTConstants::fNMaxPlanes; iPlane++) fPlaneExists[iPlane] = (track.fPlaneExists)[iPlane]; |
112 | for (Int_t iParent=0; iParent<fgkNParentsMax; iParent++) { | |
113 | fParentMCLabel[iParent] = (track.fParentMCLabel)[iParent]; | |
114 | fParentPDGCode[iParent] = (track.fParentPDGCode)[iParent]; | |
115 | } | |
820b4d9e | 116 | |
117 | } | |
118 | ||
119 | //==================================================================================================================================================== | |
120 | ||
121 | AliMuonForwardTrack& AliMuonForwardTrack::operator=(const AliMuonForwardTrack& track) { | |
122 | ||
123 | // Asignment operator | |
124 | ||
125 | // check assignement to self | |
126 | if (this == &track) return *this; | |
127 | ||
128 | // base class assignement | |
129 | AliMUONTrack::operator=(track); | |
130 | ||
131 | // clear memory | |
274c2dce | 132 | Clear(""); |
820b4d9e | 133 | |
d4643a10 | 134 | fMUONTrack = new AliMUONTrack(*(track.fMUONTrack)); |
135 | if (track.fMCTrackRef) fMCTrackRef = new TParticle(*(track.fMCTrackRef)); | |
136 | fMFTClusters = new TClonesArray(*(track.fMFTClusters)); | |
274c2dce | 137 | fMFTClusters->SetOwner(kTRUE); |
d4643a10 | 138 | fNWrongClustersMC = track.fNWrongClustersMC; |
7e3dd1af | 139 | fTrackMCId = track.fTrackMCId; |
ec7c7172 | 140 | fKinem = track.fKinem; |
141 | fParamCovMatrix = track.fParamCovMatrix; | |
026547c6 | 142 | fRAtAbsorberEnd = track.fRAtAbsorberEnd; |
d4643a10 | 143 | |
144 | for (Int_t iPlane=0; iPlane<AliMFTConstants::fNMaxPlanes; iPlane++) fPlaneExists[iPlane] = (track.fPlaneExists)[iPlane]; | |
145 | for (Int_t iParent=0; iParent<fgkNParentsMax; iParent++) { | |
146 | fParentMCLabel[iParent] = (track.fParentMCLabel)[iParent]; | |
147 | fParentPDGCode[iParent] = (track.fParentPDGCode)[iParent]; | |
148 | } | |
820b4d9e | 149 | |
150 | return *this; | |
151 | ||
152 | } | |
153 | ||
154 | //==================================================================================================================================================== | |
155 | ||
274c2dce | 156 | void AliMuonForwardTrack::Clear(const Option_t* /*opt*/) { |
157 | ||
158 | // Clear arrays | |
3b0abc02 | 159 | fMFTClusters -> Delete(); |
160 | delete fMFTClusters; fMFTClusters = 0x0; | |
274c2dce | 161 | delete fMUONTrack; fMUONTrack = 0x0; |
162 | delete fMCTrackRef; fMCTrackRef = 0x0; | |
274c2dce | 163 | |
164 | } | |
165 | ||
166 | //==================================================================================================================================================== | |
167 | ||
53b30119 | 168 | AliMuonForwardTrack::~AliMuonForwardTrack() { |
169 | ||
170 | delete fMUONTrack; | |
171 | delete fMCTrackRef; | |
b2741f03 | 172 | fMFTClusters -> Delete(); |
53b30119 | 173 | delete fMFTClusters; |
174 | ||
175 | } | |
176 | ||
177 | //==================================================================================================================================================== | |
178 | ||
820b4d9e | 179 | void AliMuonForwardTrack::SetMUONTrack(AliMUONTrack *MUONTrack) { |
180 | ||
181 | if (fMUONTrack) { | |
182 | AliInfo("fMUONTrack already exists, nothing will be done"); | |
183 | return; | |
184 | } | |
185 | ||
186 | fMUONTrack = MUONTrack; | |
d4643a10 | 187 | SetGlobalChi2(fMUONTrack->GetGlobalChi2()); |
820b4d9e | 188 | |
189 | } | |
190 | ||
191 | //==================================================================================================================================================== | |
192 | ||
193 | void AliMuonForwardTrack::SetMCTrackRef(TParticle *MCTrackRef) { | |
194 | ||
195 | if (fMCTrackRef) { | |
196 | AliInfo("fMCTrackRef already exists, nothing will be done"); | |
197 | return; | |
198 | } | |
199 | ||
200 | fMCTrackRef = MCTrackRef; | |
201 | ||
202 | } | |
203 | ||
204 | //==================================================================================================================================================== | |
205 | ||
206 | void AliMuonForwardTrack::AddTrackParamAtMFTCluster(AliMUONTrackParam &trackParam, AliMFTCluster &mftCluster) { | |
207 | ||
d4643a10 | 208 | AliDebug(1, Form("Before adding: this->fMFTClusters=%p has %d entries", this->fMFTClusters, this->fMFTClusters->GetEntries())); |
209 | Int_t iMFTCluster = this->fMFTClusters->GetEntries(); | |
820b4d9e | 210 | AliDebug(1, Form("mftCluster->GetX() = %f mftCluster->GetY() = %f mftCluster->GetErrX() = %f cmftCluster->GetErrY() = %f", |
211 | mftCluster.GetX(), mftCluster.GetY(), mftCluster.GetErrX(), mftCluster.GetErrY())); | |
212 | AliMUONVCluster *muonCluster = (AliMUONVCluster*) mftCluster.CreateMUONCluster(); | |
213 | AliDebug(1, Form("Created MUON cluster %p", muonCluster)); | |
214 | trackParam.SetUniqueID(iMFTCluster); // we profit of this slot to store the reference to the corresponding MFTCluster | |
215 | AliDebug(1, Form("Now adding muonCluster %p and trackParam %p",muonCluster, &trackParam)); | |
216 | AddTrackParamAtCluster(trackParam, *muonCluster, kTRUE); | |
820b4d9e | 217 | // we pass the parameters this->GetTrackParamAtCluster()->First() to the Kalman Filter algorithm: they will be updated!! |
218 | Double_t chi2Kalman = RunKalmanFilter(*(AliMUONTrackParam*)(GetTrackParamAtCluster()->First())); | |
d4643a10 | 219 | AliDebug(1, Form("Adding Kalman chi2 = %f to global chi2 = %f", chi2Kalman, GetGlobalChi2())); |
820b4d9e | 220 | Double_t newGlobalChi2 = GetGlobalChi2() + chi2Kalman; |
221 | mftCluster.SetLocalChi2(chi2Kalman); | |
222 | mftCluster.SetTrackChi2(newGlobalChi2); | |
d4643a10 | 223 | new ((*(this->fMFTClusters))[iMFTCluster]) AliMFTCluster(mftCluster); |
224 | AliDebug(1, Form("GetTrackParamAtCluster() = %p has %d entries while this->fMFTClusters=%p has %d entries", | |
225 | GetTrackParamAtCluster(), GetTrackParamAtCluster()->GetEntries(), this->fMFTClusters, this->fMFTClusters->GetEntries())); | |
820b4d9e | 226 | AliDebug(1, Form("muonCluster->GetZ() = %f, trackParam->GetZ() = %f",muonCluster->GetZ(), trackParam.GetZ())); |
227 | SetGlobalChi2(newGlobalChi2); | |
d4643a10 | 228 | AliDebug(1, Form("New global chi2 = %f", GetGlobalChi2())); |
820b4d9e | 229 | ((AliMUONTrackParam*) GetTrackParamAtCluster()->First())->SetTrackChi2(newGlobalChi2); |
230 | for (Int_t iPar=0; iPar<GetTrackParamAtCluster()->GetEntries(); iPar++) { | |
231 | AliDebug(1, Form("GetTrackParamAtCluster()->At(%d)->GetClusterPtr() = %p", | |
232 | iPar, ((AliMUONTrackParam*)(GetTrackParamAtCluster()->At(iPar)))->GetClusterPtr())); | |
233 | } | |
234 | ||
235 | } | |
236 | ||
237 | //==================================================================================================================================================== | |
238 | ||
239 | AliMUONTrackParam* AliMuonForwardTrack::GetTrackParamAtMUONCluster(Int_t iMUONCluster) { | |
240 | ||
241 | if (iMUONCluster<0 || iMUONCluster>=GetNMUONClusters()) { | |
242 | AliError("Invalid MUON cluster index. NULL pointer will be returned"); | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | AliMUONTrackParam *trackParam = (AliMUONTrackParam*) fMUONTrack->GetTrackParamAtCluster()->At(iMUONCluster); | |
247 | ||
248 | return trackParam; | |
249 | ||
250 | } | |
251 | ||
252 | //==================================================================================================================================================== | |
253 | ||
254 | AliMUONTrackParam* AliMuonForwardTrack::GetTrackParamAtMFTCluster(Int_t iMFTCluster) { | |
255 | ||
256 | if (iMFTCluster<0 || iMFTCluster>=GetNMFTClusters()) { | |
257 | AliError("Invalid MFT cluster index. NULL pointer will be returned"); | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | AliMUONTrackParam *trackParam = (AliMUONTrackParam*) GetTrackParamAtCluster()->At(iMFTCluster); | |
262 | ||
263 | return trackParam; | |
264 | ||
265 | } | |
266 | ||
267 | //==================================================================================================================================================== | |
268 | ||
269 | AliMUONVCluster* AliMuonForwardTrack::GetMUONCluster(Int_t iMUONCluster) { | |
270 | ||
271 | if (iMUONCluster<0 || iMUONCluster>=GetNMUONClusters()) { | |
272 | AliError("Invalid MUON cluster index. NULL pointer will be returned"); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | AliMUONTrackParam *trackParam = GetTrackParamAtMUONCluster(iMUONCluster); | |
277 | AliMUONVCluster *muonCluster = trackParam->GetClusterPtr(); | |
278 | ||
279 | return muonCluster; | |
280 | ||
281 | } | |
282 | ||
283 | //==================================================================================================================================================== | |
284 | ||
285 | AliMFTCluster* AliMuonForwardTrack::GetMFTCluster(Int_t iMFTCluster) { | |
286 | ||
287 | if (iMFTCluster<0 || iMFTCluster>=GetNMFTClusters()) { | |
d4643a10 | 288 | AliError(Form("Invalid MFT cluster index (%d). GetNMFTClusters()=%d. NULL pointer will be returned", iMFTCluster, GetNMFTClusters())); |
820b4d9e | 289 | return NULL; |
290 | } | |
291 | ||
292 | AliMUONTrackParam *trackParam = GetTrackParamAtMFTCluster(iMFTCluster); | |
d4643a10 | 293 | AliMFTCluster *mftCluster = (AliMFTCluster*) this->fMFTClusters->At(trackParam->GetUniqueID()); |
820b4d9e | 294 | |
295 | return mftCluster; | |
296 | ||
297 | } | |
298 | ||
299 | //==================================================================================================================================================== | |
300 | ||
301 | Double_t AliMuonForwardTrack::RunKalmanFilter(AliMUONTrackParam &trackParamAtCluster) { | |
302 | ||
303 | AliDebug(1, Form("Running Kalman filter for parameters %p (z = %f) and cluster %p (z = %f)", | |
304 | &trackParamAtCluster, trackParamAtCluster.GetZ(), trackParamAtCluster.GetClusterPtr(), trackParamAtCluster.GetClusterPtr()->GetZ())); | |
305 | ||
306 | // Compute new track parameters and their covariances including new cluster using kalman filter | |
307 | // return the *additional* track chi2 | |
308 | ||
309 | // Get actual track parameters (p) | |
310 | TMatrixD param(trackParamAtCluster.GetParameters()); | |
311 | ||
312 | // Get new cluster parameters (m) | |
313 | AliMUONVCluster *cluster = trackParamAtCluster.GetClusterPtr(); | |
314 | AliDebug(1, Form("cluster->GetX() = %f cluster->GetY() = %f cluster->GetErrX() = %f cluster->GetErrY() = %f", | |
315 | cluster->GetX(), cluster->GetY(), cluster->GetErrX(), cluster->GetErrY())); | |
316 | TMatrixD clusterParam(5,1); | |
317 | clusterParam.Zero(); | |
318 | clusterParam(0,0) = cluster->GetX(); | |
319 | clusterParam(2,0) = cluster->GetY(); | |
320 | ||
321 | // Compute the current parameter weight (W) | |
322 | TMatrixD paramWeight(trackParamAtCluster.GetCovariances()); | |
323 | if (paramWeight.Determinant() != 0) { | |
324 | paramWeight.Invert(); | |
325 | } else { | |
326 | Warning("RunKalmanFilter"," Determinant = 0"); | |
327 | return 1.e10; | |
328 | } | |
329 | ||
330 | // Compute the new cluster weight (U) | |
331 | TMatrixD clusterWeight(5,5); | |
332 | clusterWeight.Zero(); | |
333 | clusterWeight(0,0) = 1. / cluster->GetErrX2(); | |
334 | clusterWeight(2,2) = 1. / cluster->GetErrY2(); | |
335 | ||
336 | // Compute the new parameters covariance matrix ( (W+U)^-1 ) | |
337 | TMatrixD newParamCov(paramWeight,TMatrixD::kPlus,clusterWeight); | |
338 | if (newParamCov.Determinant() != 0) { | |
339 | newParamCov.Invert(); | |
340 | } | |
341 | else { | |
342 | Warning("RunKalmanFilter"," Determinant = 0"); | |
343 | return 1.e10; | |
344 | } | |
345 | ||
346 | // Save the new parameters covariance matrix | |
347 | trackParamAtCluster.SetCovariances(newParamCov); | |
348 | ||
349 | // Compute the new parameters (p' = ((W+U)^-1)U(m-p) + p) | |
350 | TMatrixD tmp(clusterParam,TMatrixD::kMinus,param); | |
351 | TMatrixD tmp2(clusterWeight,TMatrixD::kMult,tmp); // U(m-p) | |
352 | TMatrixD newParam(newParamCov,TMatrixD::kMult,tmp2); // ((W+U)^-1)U(m-p) | |
353 | newParam += param; // ((W+U)^-1)U(m-p) + p | |
354 | ||
355 | // Save the new parameters | |
356 | trackParamAtCluster.SetParameters(newParam); | |
357 | ||
358 | // Compute the additional chi2 (= ((p'-p)^-1)W(p'-p) + ((p'-m)^-1)U(p'-m)) | |
359 | tmp = newParam; // p' | |
360 | tmp -= param; // (p'-p) | |
361 | TMatrixD tmp3(paramWeight,TMatrixD::kMult,tmp); // W(p'-p) | |
362 | TMatrixD addChi2Track(tmp,TMatrixD::kTransposeMult,tmp3); // ((p'-p)^-1)W(p'-p) | |
363 | tmp = newParam; // p' | |
364 | tmp -= clusterParam; // (p'-m) | |
365 | TMatrixD tmp4(clusterWeight,TMatrixD::kMult,tmp); // U(p'-m) | |
366 | addChi2Track += TMatrixD(tmp,TMatrixD::kTransposeMult,tmp4); // ((p'-p)^-1)W(p'-p) + ((p'-m)^-1)U(p'-m) | |
367 | ||
368 | AliDebug(1,Form("Adding Kalman chi2 = %f",addChi2Track(0,0))); | |
369 | ||
370 | return addChi2Track(0,0); | |
371 | ||
372 | } | |
373 | ||
374 | //==================================================================================================================================================== | |
375 | ||
376 | Double_t AliMuonForwardTrack::GetWeightedOffset(Double_t x, Double_t y, Double_t z) { | |
377 | ||
378 | AliMUONTrackParam *param = GetTrackParamAtMFTCluster(0); | |
379 | AliMUONTrackExtrap::ExtrapToZCov(param, z); | |
380 | ||
381 | TMatrixD cov(5,5); | |
382 | cov = param->GetCovariances(); | |
383 | ||
384 | TMatrixD covCoordinates(2,2); | |
385 | covCoordinates(0,0) = cov(0,0); | |
386 | covCoordinates(0,1) = cov(0,2); | |
387 | covCoordinates(1,0) = cov(2,0); | |
388 | covCoordinates(1,1) = cov(2,2); | |
389 | ||
390 | TMatrixD covCoordinatesInverse = covCoordinates.Invert(); | |
391 | ||
392 | Double_t dX = param->GetNonBendingCoor() - x; | |
393 | Double_t dY = param->GetBendingCoor() - y; | |
394 | ||
395 | Double_t weightedOffset = TMath::Sqrt(0.5*(dX*dX*covCoordinatesInverse(0,0) + | |
396 | dY*dY*covCoordinatesInverse(1,1) + | |
397 | 2.*dX*dY*covCoordinatesInverse(0,1))); | |
398 | ||
399 | return weightedOffset; | |
400 | ||
401 | } | |
402 | ||
403 | //==================================================================================================================================================== | |
404 | ||
405 | Double_t AliMuonForwardTrack::GetOffsetX(Double_t x, Double_t z) { | |
406 | ||
407 | AliMUONTrackParam *param = GetTrackParamAtMFTCluster(0); | |
408 | AliMUONTrackExtrap::ExtrapToZCov(param, z); | |
409 | Double_t dX = param->GetNonBendingCoor() - x; | |
410 | return dX; | |
411 | ||
412 | } | |
413 | ||
414 | //==================================================================================================================================================== | |
415 | ||
416 | Double_t AliMuonForwardTrack::GetOffsetY(Double_t y, Double_t z) { | |
417 | ||
418 | AliMUONTrackParam *param = GetTrackParamAtMFTCluster(0); | |
419 | AliMUONTrackExtrap::ExtrapToZCov(param, z); | |
420 | Double_t dY = param->GetBendingCoor() - y; | |
421 | return dY; | |
422 | ||
423 | } | |
424 | ||
425 | //==================================================================================================================================================== | |
426 | ||
427 | Double_t AliMuonForwardTrack::GetOffset(Double_t x, Double_t y, Double_t z) { | |
428 | ||
429 | AliMUONTrackParam *param = GetTrackParamAtMFTCluster(0); | |
430 | AliMUONTrackExtrap::ExtrapToZCov(param, z); | |
431 | Double_t dX = param->GetNonBendingCoor() - x; | |
432 | Double_t dY = param->GetBendingCoor() - y; | |
433 | return TMath::Sqrt(dX*dX + dY*dY); | |
434 | ||
435 | } | |
436 | ||
437 | //==================================================================================================================================================== | |
438 | ||
94bd88d5 | 439 | Double_t AliMuonForwardTrack::GetDCA(Double_t x, Double_t y, Double_t z) { |
440 | ||
441 | // Distance of Closest Approach, according to the standard MUON terminology. Actually, the offset of the track w.r.t. the primary vertex, | |
442 | // where the extrapolation of the track DOES NOT include the MFT information | |
443 | ||
ce5394b9 | 444 | AliMUONTrackParam param = (*((AliMUONTrackParam*)(GetTrackParamAtMUONCluster(0)))); |
445 | ||
446 | AliMUONTrackExtrap::ExtrapToVertexWithoutBranson(¶m, z); | |
447 | Double_t dX = param.GetNonBendingCoor() - x; | |
448 | Double_t dY = param.GetBendingCoor() - y; | |
94bd88d5 | 449 | return TMath::Sqrt(dX*dX + dY*dY); |
450 | ||
451 | } | |
452 | ||
453 | //==================================================================================================================================================== | |
454 | ||
455 | Double_t AliMuonForwardTrack::GetMomentumSpectrometer(Double_t z) { | |
456 | ||
457 | // Momentum of the track at the primary vertex plane, where the extrapolation of the track DOES NOT include the MFT information | |
458 | ||
ce5394b9 | 459 | AliMUONTrackParam param = (*((AliMUONTrackParam*)(GetTrackParamAtMUONCluster(0)))); |
460 | ||
461 | AliMUONTrackExtrap::ExtrapToVertexWithoutBranson(¶m, z); | |
462 | return param.P(); | |
94bd88d5 | 463 | |
464 | } | |
465 | ||
466 | //==================================================================================================================================================== | |
467 | ||
468 | Double_t AliMuonForwardTrack::GetThetaAbs() { | |
469 | ||
470 | // it is the angle defined by the imaginary line goingo from the vertex to the exit point of the track at the end of the hadron absorber | |
471 | ||
472 | Double_t z = AliMUONConstants::AbsZEnd(); | |
ce5394b9 | 473 | |
474 | AliMUONTrackParam param = (*((AliMUONTrackParam*)(GetTrackParamAtMUONCluster(0)))); | |
475 | ||
476 | AliMUONTrackExtrap::ExtrapToZ(¶m, z); | |
477 | Double_t x = param.GetNonBendingCoor(); | |
478 | Double_t y = param.GetBendingCoor(); | |
94bd88d5 | 479 | |
480 | return 180. +TMath::ATan(TMath::Sqrt(x*x + y*y)/z)*TMath::RadToDeg(); | |
481 | ||
482 | } | |
483 | ||
484 | //==================================================================================================================================================== | |
485 | ||
45c2d1ca | 486 | Bool_t AliMuonForwardTrack::IsFromDirectResonance() { |
3a775f35 | 487 | |
45c2d1ca | 488 | if (!IsMuon()) return kFALSE; |
3a775f35 | 489 | |
45c2d1ca | 490 | for (Int_t i=GetFirstMotherID(); i>=0; i--) if (!IsPDGResonance(GetParentPDGCode(i))) return kFALSE; // the decay chain finds a non-resonance particle |
491 | ||
492 | return kTRUE; | |
3a775f35 | 493 | |
494 | } | |
495 | ||
496 | //==================================================================================================================================================== | |
497 | ||
45c2d1ca | 498 | Bool_t AliMuonForwardTrack::IsFromChainResonance() { |
3a775f35 | 499 | |
45c2d1ca | 500 | if (!IsMuon()) return kFALSE; |
3a775f35 | 501 | |
45c2d1ca | 502 | if (GetFirstMotherID() == 0) return kFALSE; // it is not a chain |
503 | ||
504 | if (!IsPDGResonance(GetParentPDGCode(GetFirstMotherID()))) return kFALSE; // primordial is not a resonance | |
505 | ||
506 | for (Int_t i=GetFirstMotherID()-1; i>=0; i--) if (!IsPDGResonance(GetParentPDGCode(i))) return kTRUE; // the decay chain finds a non-resonance particle | |
507 | ||
508 | return kFALSE; | |
3a775f35 | 509 | |
510 | } | |
511 | ||
512 | //==================================================================================================================================================== | |
513 | ||
45c2d1ca | 514 | Bool_t AliMuonForwardTrack::IsFromDirectCharm() { |
3a775f35 | 515 | |
45c2d1ca | 516 | if (!IsMuon()) return kFALSE; |
517 | ||
518 | for (Int_t i=GetFirstMotherID(); i>=0; i--) if (!IsPDGCharm(GetParentPDGCode(i))) return kFALSE; // the decay chain finds a non-charmed particle | |
519 | ||
520 | return kTRUE; | |
521 | ||
522 | } | |
523 | ||
524 | //==================================================================================================================================================== | |
525 | ||
526 | Bool_t AliMuonForwardTrack::IsFromChainCharm() { | |
527 | ||
528 | if (!IsMuon()) return kFALSE; | |
529 | ||
530 | if (GetFirstMotherID() == 0) return kFALSE; // it is not a chain | |
531 | ||
532 | if (!IsPDGCharm(GetParentPDGCode(GetFirstMotherID()))) return kFALSE; // primordial is not a charmed hadron | |
533 | ||
534 | for (Int_t i=GetFirstMotherID()-1; i>=0; i--) if (!IsPDGCharm(GetParentPDGCode(i))) return kTRUE; // the decay chain finds a non-charmed particle | |
535 | ||
536 | return kFALSE; | |
537 | ||
538 | } | |
539 | ||
540 | //==================================================================================================================================================== | |
541 | ||
542 | Bool_t AliMuonForwardTrack::IsFromDirectBeauty() { | |
543 | ||
544 | if (!IsMuon()) return kFALSE; | |
545 | ||
546 | for (Int_t i=GetFirstMotherID(); i>=0; i--) if (!IsPDGBeauty(GetParentPDGCode(i))) return kFALSE; // the decay chain finds a non-beauty particle | |
547 | ||
548 | return kTRUE; | |
3a775f35 | 549 | |
3a775f35 | 550 | } |
551 | ||
552 | //==================================================================================================================================================== | |
553 | ||
45c2d1ca | 554 | Bool_t AliMuonForwardTrack::IsFromChainBeauty() { |
555 | ||
556 | if (!IsMuon()) return kFALSE; | |
557 | ||
558 | if (GetFirstMotherID() == 0) return kFALSE; // it is not a chain | |
559 | ||
560 | if (!IsPDGBeauty(GetParentPDGCode(GetFirstMotherID()))) return kFALSE; // primordial is not a beauty hadron | |
561 | ||
562 | for (Int_t i=GetFirstMotherID()-1; i>=0; i--) if (!IsPDGBeauty(GetParentPDGCode(i))) return kTRUE; // the decay chain finds a non-beauty particle | |
563 | ||
564 | return kFALSE; | |
565 | ||
566 | } | |
567 | ||
568 | //==================================================================================================================================================== | |
569 | ||
570 | Bool_t AliMuonForwardTrack::IsMuon() { | |
571 | ||
572 | if (IsFake()) return kFALSE; | |
573 | ||
574 | if (TMath::Abs(fMCTrackRef->GetPdgCode())==13) return kTRUE; | |
575 | ||
576 | return kFALSE; | |
577 | ||
578 | } | |
579 | ||
580 | //==================================================================================================================================================== | |
581 | ||
582 | Bool_t AliMuonForwardTrack::IsFake() { | |
583 | ||
584 | if (!fMCTrackRef) return kTRUE; | |
585 | ||
586 | return kFALSE; | |
587 | ||
588 | } | |
589 | ||
590 | //==================================================================================================================================================== | |
591 | ||
592 | Bool_t AliMuonForwardTrack::IsPDGResonance(Int_t pdg) { | |
593 | ||
594 | // if (pdg<10) return kFALSE; | |
595 | // Int_t id = pdg%100000; | |
596 | // return (!((id-id%10)%110)); | |
fb4dfc11 | 597 | |
598 | Bool_t result = kFALSE; | |
599 | ||
45c2d1ca | 600 | if ( pdg == 113 || |
601 | pdg == 221 || | |
602 | pdg == 223 || | |
603 | pdg == 331 || | |
604 | pdg == 333 || | |
605 | pdg == 443 || | |
606 | pdg == 100443 || | |
607 | pdg == 553 || | |
608 | pdg == 100553 ) result = kTRUE; | |
fb4dfc11 | 609 | |
610 | return result; | |
611 | ||
612 | } | |
613 | ||
614 | //==================================================================================================================================================== | |
615 | ||
64185694 | 616 | Bool_t AliMuonForwardTrack::IsPDGCharm(Int_t pdg) { |
617 | ||
618 | Bool_t result = kFALSE; | |
619 | ||
620 | if ( TMath::Abs(pdg) == 411 || | |
621 | TMath::Abs(pdg) == 421 || | |
622 | TMath::Abs(pdg) == 10411 || | |
623 | TMath::Abs(pdg) == 10421 || | |
624 | TMath::Abs(pdg) == 413 || | |
625 | TMath::Abs(pdg) == 423 || | |
626 | TMath::Abs(pdg) == 10413 || | |
627 | TMath::Abs(pdg) == 10423 || | |
628 | TMath::Abs(pdg) == 20413 || | |
629 | TMath::Abs(pdg) == 20423 || | |
630 | TMath::Abs(pdg) == 415 || | |
631 | TMath::Abs(pdg) == 425 || | |
632 | TMath::Abs(pdg) == 431 || | |
633 | TMath::Abs(pdg) == 10431 || | |
634 | TMath::Abs(pdg) == 433 || | |
635 | TMath::Abs(pdg) == 10433 || | |
636 | TMath::Abs(pdg) == 20433 || | |
637 | TMath::Abs(pdg) == 435 ) result = kTRUE; | |
638 | ||
639 | return result; | |
640 | ||
641 | } | |
642 | ||
643 | //==================================================================================================================================================== | |
644 | ||
645 | Bool_t AliMuonForwardTrack::IsPDGBeauty(Int_t pdg) { | |
646 | ||
647 | Bool_t result = kFALSE; | |
648 | ||
649 | if ( TMath::Abs(pdg) == 511 || | |
650 | TMath::Abs(pdg) == 521 || | |
651 | TMath::Abs(pdg) == 10511 || | |
652 | TMath::Abs(pdg) == 10521 || | |
653 | TMath::Abs(pdg) == 513 || | |
654 | TMath::Abs(pdg) == 523 || | |
655 | TMath::Abs(pdg) == 10513 || | |
656 | TMath::Abs(pdg) == 10523 || | |
657 | TMath::Abs(pdg) == 20513 || | |
658 | TMath::Abs(pdg) == 20523 || | |
659 | TMath::Abs(pdg) == 515 || | |
660 | TMath::Abs(pdg) == 525 || | |
661 | TMath::Abs(pdg) == 531 || | |
662 | TMath::Abs(pdg) == 10531 || | |
663 | TMath::Abs(pdg) == 533 || | |
664 | TMath::Abs(pdg) == 10533 || | |
665 | TMath::Abs(pdg) == 20533 || | |
666 | TMath::Abs(pdg) == 535 || | |
667 | TMath::Abs(pdg) == 541 || | |
668 | TMath::Abs(pdg) == 10541 || | |
669 | TMath::Abs(pdg) == 543 || | |
670 | TMath::Abs(pdg) == 10543 || | |
671 | TMath::Abs(pdg) == 20543 || | |
672 | TMath::Abs(pdg) == 545 ) result = kTRUE; | |
673 | ||
674 | return result; | |
675 | ||
676 | } | |
677 | ||
678 | //==================================================================================================================================================== | |
679 | ||
45c2d1ca | 680 | Bool_t AliMuonForwardTrack::IsMuonFromBackground() { |
3a775f35 | 681 | |
682 | Bool_t result = kFALSE; | |
683 | ||
45c2d1ca | 684 | if (!IsMuon()) return result; |
685 | ||
686 | if (!IsFromDirectResonance() && !IsFromChainResonance() && !IsFromDirectCharm() && !IsFromChainCharm() && !IsFromDirectBeauty() && !IsFromChainBeauty()) result = kTRUE; | |
3a775f35 | 687 | |
688 | if (result) AliDebug(1, Form("Muon comes from a background source %d", GetParentPDGCode(0))); | |
689 | ||
690 | return result; | |
691 | ||
692 | } | |
693 | ||
694 | //==================================================================================================================================================== | |
ec7c7172 | 695 | |
696 | void AliMuonForwardTrack::EvalKinem(Double_t z) { | |
697 | ||
698 | AliMUONTrackParam *param = GetTrackParamAtMFTCluster(0); | |
699 | AliMUONTrackExtrap::ExtrapToZCov(param, z); | |
700 | ||
701 | Double_t mMu = TDatabasePDG::Instance()->GetParticle("mu-")->Mass(); | |
702 | Double_t energy = TMath::Sqrt(param->P()*param->P() + mMu*mMu); | |
703 | fKinem.SetPxPyPzE(param->Px(), param->Py(), param->Pz(), energy); | |
704 | ||
705 | TMatrixD cov(5,5); | |
706 | fParamCovMatrix = param->GetCovariances(); | |
707 | ||
708 | } | |
709 | ||
710 | //==================================================================================================================================================== | |
711 | ||
45c2d1ca | 712 | Int_t AliMuonForwardTrack::GetFirstMotherID() { |
713 | ||
714 | Int_t motherLevel = 0; | |
715 | Int_t motherMCLabel = GetParentMCLabel(motherLevel); | |
716 | while (motherMCLabel >= 0) { | |
717 | motherLevel++; | |
718 | motherMCLabel = GetParentMCLabel(motherLevel); | |
719 | } | |
720 | return motherLevel-1; | |
721 | ||
722 | } | |
723 | ||
724 | //==================================================================================================================================================== | |
725 | ||
726 | void AliMuonForwardTrack::PrintHistory() { | |
727 | ||
728 | if (IsFake()) printf("Track is a fake MUON\n"); | |
729 | else { | |
730 | TString history = ""; | |
731 | for (Int_t i=GetFirstMotherID(); i>=0; i--) { | |
732 | history += TDatabasePDG::Instance()->GetParticle(GetParentPDGCode(i))->GetName(); | |
733 | history += " -> "; | |
734 | } | |
735 | history += TDatabasePDG::Instance()->GetParticle(fMCTrackRef->GetPdgCode())->GetName(); | |
736 | printf("%s\n",history.Data()); | |
737 | } | |
738 | ||
739 | } | |
740 | ||
741 | //==================================================================================================================================================== |