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0ab648ea | 1 | /************************************************************************** |
2 | * Author: Panos Christakoglou. * | |
3 | * Contributors are mentioned in the code where appropriate. * | |
4 | * * | |
5 | * Permission to use, copy, modify and distribute this software and its * | |
6 | * documentation strictly for non-commercial purposes is hereby granted * | |
7 | * without fee, provided that the above copyright notice appears in all * | |
8 | * copies and that both the copyright notice and this permission notice * | |
9 | * appear in the supporting documentation. The authors make no claims * | |
10 | * about the suitability of this software for any purpose. It is * | |
11 | * provided "as is" without express or implied warranty. * | |
12 | **************************************************************************/ | |
13 | ||
14 | /* $Id: AliProtonAnalysisBase.cxx 31056 2009-02-16 14:31:41Z pchrist $ */ | |
15 | ||
16 | //----------------------------------------------------------------- | |
17 | // AliProtonAnalysisBase class | |
18 | // This is the class to deal with the proton analysis | |
19 | // Origin: Panos Christakoglou | Panos.Christakoglou@cern.ch | |
20 | //----------------------------------------------------------------- | |
21 | #include <Riostream.h> | |
0ab648ea | 22 | #include <TCanvas.h> |
23 | #include <TLatex.h> | |
73aba974 | 24 | #include <TF1.h> |
0ab648ea | 25 | |
26 | #include <AliExternalTrackParam.h> | |
27 | #include <AliESDEvent.h> | |
0ab648ea | 28 | #include <AliPID.h> |
0ab648ea | 29 | #include <AliVertexerTracks.h> |
30 | ||
73aba974 | 31 | class AliLog; |
32 | class AliESDVertex; | |
33 | ||
34 | #include "AliProtonAnalysisBase.h" | |
35 | ||
0ab648ea | 36 | ClassImp(AliProtonAnalysisBase) |
37 | ||
38 | //____________________________________________________________________// | |
39 | AliProtonAnalysisBase::AliProtonAnalysisBase() : | |
40 | TObject(), fProtonAnalysisLevel("ESD"), | |
41 | fTriggerMode(kMB2), fProtonAnalysisMode(kTPC), fProtonPIDMode(kBayesian), | |
42 | fAnalysisEtaMode(kFALSE), | |
43 | fVxMax(100.), fVyMax(100.), fVzMax(100.), | |
44 | fNBinsX(0), fMinX(0), fMaxX(0), | |
45 | fNBinsY(0), fMinY(0), fMaxY(0), | |
46 | fMinTPCClusters(0), fMinITSClusters(0), | |
47 | fMaxChi2PerTPCCluster(0), fMaxChi2PerITSCluster(0), | |
48 | fMaxCov11(0), fMaxCov22(0), fMaxCov33(0), fMaxCov44(0), fMaxCov55(0), | |
49 | fMaxSigmaToVertex(0), fMaxSigmaToVertexTPC(0), | |
50 | fMaxDCAXY(0), fMaxDCAXYTPC(0), | |
51 | fMaxDCAZ(0), fMaxDCAZTPC(0), | |
52 | fMaxDCA3D(0), fMaxDCA3DTPC(0), | |
87a55728 | 53 | fMaxConstrainChi2(0), fMinTPCdEdxPoints(0), |
0ab648ea | 54 | fMinTPCClustersFlag(kFALSE), fMinITSClustersFlag(kFALSE), |
55 | fMaxChi2PerTPCClusterFlag(kFALSE), fMaxChi2PerITSClusterFlag(kFALSE), | |
56 | fMaxCov11Flag(kFALSE), fMaxCov22Flag(kFALSE), | |
57 | fMaxCov33Flag(kFALSE), fMaxCov44Flag(kFALSE), fMaxCov55Flag(kFALSE), | |
58 | fMaxSigmaToVertexFlag(kFALSE), fMaxSigmaToVertexTPCFlag(kFALSE), | |
59 | fMaxDCAXYFlag(kFALSE), fMaxDCAXYTPCFlag(kFALSE), | |
60 | fMaxDCAZFlag(kFALSE), fMaxDCAZTPCFlag(kFALSE), | |
61 | fMaxDCA3DFlag(kFALSE), fMaxDCA3DTPCFlag(kFALSE), | |
62 | fMaxConstrainChi2Flag(kFALSE), | |
63 | fITSRefitFlag(kFALSE), fTPCRefitFlag(kFALSE), | |
64 | fESDpidFlag(kFALSE), fTPCpidFlag(kFALSE), | |
65 | fPointOnITSLayer1Flag(0), fPointOnITSLayer2Flag(0), | |
66 | fPointOnITSLayer3Flag(0), fPointOnITSLayer4Flag(0), | |
67 | fPointOnITSLayer5Flag(0), fPointOnITSLayer6Flag(0), | |
87a55728 | 68 | fMinTPCdEdxPointsFlag(kFALSE), |
0ab648ea | 69 | fFunctionProbabilityFlag(kFALSE), |
87a55728 | 70 | fNSigma(0), |
0ab648ea | 71 | fElectronFunction(0), fMuonFunction(0), |
72 | fPionFunction(0), fKaonFunction(0), fProtonFunction(0), | |
73 | fDebugMode(kFALSE) { | |
74 | //Default constructor | |
75 | for(Int_t i = 0; i < 5; i++) fPartFrac[i] = 0.0; | |
87a55728 | 76 | for(Int_t i = 0; i < 5; i++) { |
77 | fdEdxMean[i] = 0.0; | |
78 | fdEdxSigma[i] = 0.0; | |
79 | } | |
0ab648ea | 80 | } |
81 | ||
82 | //____________________________________________________________________// | |
83 | AliProtonAnalysisBase::~AliProtonAnalysisBase() { | |
84 | //Default destructor | |
85 | if(fElectronFunction) delete fElectronFunction; | |
86 | if(fMuonFunction) delete fMuonFunction; | |
87 | if(fPionFunction) delete fPionFunction; | |
88 | if(fKaonFunction) delete fKaonFunction; | |
89 | if(fProtonFunction) delete fProtonFunction; | |
90 | } | |
91 | ||
92 | //____________________________________________________________________// | |
93 | Double_t AliProtonAnalysisBase::GetParticleFraction(Int_t i, Double_t p) { | |
94 | //Return the a priori probs | |
95 | Double_t partFrac=0; | |
96 | if(fFunctionProbabilityFlag) { | |
97 | if(i == 0) partFrac = fElectronFunction->Eval(p); | |
98 | if(i == 1) partFrac = fMuonFunction->Eval(p); | |
99 | if(i == 2) partFrac = fPionFunction->Eval(p); | |
100 | if(i == 3) partFrac = fKaonFunction->Eval(p); | |
101 | if(i == 4) partFrac = fProtonFunction->Eval(p); | |
102 | } | |
103 | else partFrac = fPartFrac[i]; | |
104 | ||
105 | return partFrac; | |
106 | } | |
107 | ||
108 | //____________________________________________________________________// | |
109 | Bool_t AliProtonAnalysisBase::IsInPhaseSpace(AliESDtrack* const track) { | |
110 | // Checks if the track is outside the analyzed y-Pt phase space | |
111 | Double_t gPt = 0.0, gPx = 0.0, gPy = 0.0, gPz = 0.0; | |
112 | Double_t eta = 0.0; | |
113 | ||
114 | if(kTPC) { | |
115 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
116 | if(!tpcTrack) { | |
117 | gPt = 0.0; gPx = 0.0; gPy = 0.0; gPz = 0.0; eta = -10.0; | |
118 | } | |
119 | else { | |
120 | gPt = tpcTrack->Pt(); | |
121 | gPx = tpcTrack->Px(); | |
122 | gPy = tpcTrack->Py(); | |
123 | gPz = tpcTrack->Pz(); | |
124 | eta = tpcTrack->Eta(); | |
125 | } | |
126 | } | |
127 | else { | |
128 | gPt = track->Pt(); | |
129 | gPx = track->Px(); | |
130 | gPy = track->Py(); | |
131 | gPz = track->Pz(); | |
132 | eta = track->Eta(); | |
133 | } | |
134 | ||
135 | if((gPt < fMinY) || (gPt > fMaxY)) { | |
136 | if(fDebugMode) | |
137 | Printf("IsInPhaseSpace: Track rejected because it has a Pt value of %lf (accepted interval: %lf - %lf)",gPt,fMinY,fMaxY); | |
138 | return kFALSE; | |
139 | } | |
140 | if(fAnalysisEtaMode) { | |
141 | if((eta < fMinX) || (eta > fMaxX)) { | |
142 | if(fDebugMode) | |
143 | Printf("IsInPhaseSpace: Track rejected because it has an eta value of %lf (accepted interval: %lf - %lf)",eta,fMinX,fMaxX); | |
144 | return kFALSE; | |
145 | } | |
146 | } | |
147 | else { | |
148 | if((Rapidity(gPx,gPy,gPz) < fMinX) || (Rapidity(gPx,gPy,gPz) > fMaxX)) { | |
149 | if(fDebugMode) | |
150 | Printf("IsInPhaseSpace: Track rejected because it has a y value of %lf (accepted interval: %lf - %lf)",Rapidity(gPx,gPy,gPz),fMinX,fMaxX); | |
151 | return kFALSE; | |
152 | } | |
153 | } | |
154 | ||
155 | return kTRUE; | |
156 | } | |
157 | ||
158 | //____________________________________________________________________// | |
159 | Bool_t AliProtonAnalysisBase::IsAccepted(AliESDEvent *esd, | |
160 | const AliESDVertex *vertex, | |
161 | AliESDtrack* track) { | |
162 | // Checks if the track is excluded from the cuts | |
163 | Double_t gPt = 0.0, gPx = 0.0, gPy = 0.0, gPz = 0.0; | |
164 | Double_t dca[2] = {0.0,0.0}, cov[3] = {0.0,0.0,0.0}; //The impact parameters and their covariance. | |
165 | Double_t dca3D = 0.0; | |
166 | ||
167 | if((kTPC)&&(!kHybrid)) { | |
168 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
169 | if(!tpcTrack) { | |
170 | gPt = 0.0; gPx = 0.0; gPy = 0.0; gPz = 0.0; | |
171 | dca[0] = -100.; dca[1] = -100.; dca3D = -100.; | |
172 | cov[0] = -100.; cov[1] = -100.; cov[2] = -100.; | |
173 | } | |
174 | else { | |
175 | gPt = tpcTrack->Pt(); | |
176 | gPx = tpcTrack->Px(); | |
177 | gPy = tpcTrack->Py(); | |
178 | gPz = tpcTrack->Pz(); | |
179 | tpcTrack->PropagateToDCA(vertex, | |
180 | esd->GetMagneticField(), | |
181 | 100.,dca,cov); | |
182 | } | |
183 | } | |
184 | else if(kHybrid) { | |
185 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
186 | if(!tpcTrack) { | |
187 | gPt = 0.0; gPx = 0.0; gPy = 0.0; gPz = 0.0; | |
188 | dca[0] = -100.; dca[1] = -100.; | |
189 | cov[0] = -100.; cov[1] = -100.; cov[2] = -100.; | |
190 | } | |
191 | else { | |
192 | gPt = tpcTrack->Pt(); | |
193 | gPx = tpcTrack->Px(); | |
194 | gPy = tpcTrack->Py(); | |
195 | gPz = tpcTrack->Pz(); | |
196 | tpcTrack->PropagateToDCA(vertex, | |
197 | esd->GetMagneticField(), | |
198 | 100.,dca,cov); | |
199 | } | |
200 | } | |
201 | else{ | |
202 | gPt = track->Pt(); | |
203 | gPx = track->Px(); | |
204 | gPy = track->Py(); | |
205 | gPz = track->Pz(); | |
206 | track->PropagateToDCA(vertex, | |
207 | esd->GetMagneticField(), | |
208 | 100.,dca,cov); | |
209 | } | |
210 | dca3D = TMath::Sqrt(TMath::Power(dca[0],2) + | |
211 | TMath::Power(dca[1],2)); | |
212 | ||
213 | Int_t fIdxInt[200]; | |
214 | Int_t nClustersITS = track->GetITSclusters(fIdxInt); | |
215 | Int_t nClustersTPC = track->GetTPCclusters(fIdxInt); | |
216 | ||
217 | Float_t chi2PerClusterITS = -1; | |
218 | if (nClustersITS!=0) | |
219 | chi2PerClusterITS = track->GetITSchi2()/Float_t(nClustersITS); | |
220 | Float_t chi2PerClusterTPC = -1; | |
221 | if (nClustersTPC!=0) | |
222 | chi2PerClusterTPC = track->GetTPCchi2()/Float_t(nClustersTPC); | |
223 | ||
224 | Double_t extCov[15]; | |
225 | track->GetExternalCovariance(extCov); | |
226 | ||
227 | if(fPointOnITSLayer1Flag) { | |
228 | if(!track->HasPointOnITSLayer(0)) { | |
229 | if(fDebugMode) | |
230 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 1st ITS layer"); | |
231 | return kFALSE; | |
232 | } | |
233 | } | |
234 | if(fPointOnITSLayer2Flag) { | |
235 | if(!track->HasPointOnITSLayer(1)) { | |
236 | if(fDebugMode) | |
237 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 2nd ITS layer"); | |
238 | return kFALSE; | |
239 | } | |
240 | } | |
241 | if(fPointOnITSLayer3Flag) { | |
242 | if(!track->HasPointOnITSLayer(2)) { | |
243 | if(fDebugMode) | |
244 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 3rd ITS layer"); | |
245 | return kFALSE; | |
246 | } | |
247 | } | |
248 | if(fPointOnITSLayer4Flag) { | |
249 | if(!track->HasPointOnITSLayer(3)) { | |
250 | if(fDebugMode) | |
251 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 4th ITS layer"); | |
252 | return kFALSE; | |
253 | } | |
254 | } | |
255 | if(fPointOnITSLayer5Flag) { | |
256 | if(!track->HasPointOnITSLayer(4)) { | |
257 | if(fDebugMode) | |
258 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 5th ITS layer"); | |
259 | return kFALSE; | |
260 | } | |
261 | } | |
262 | if(fPointOnITSLayer6Flag) { | |
263 | if(!track->HasPointOnITSLayer(5)) { | |
264 | if(fDebugMode) | |
265 | Printf("IsAccepted: Track rejected because it doesn't have a point on the 6th ITS layer"); | |
266 | return kFALSE; | |
267 | } | |
268 | } | |
269 | if(fMinITSClustersFlag) { | |
270 | if(nClustersITS < fMinITSClusters) { | |
271 | if(fDebugMode) | |
272 | Printf("IsAccepted: Track rejected because it has %d ITS points (min. requested: %d)",nClustersITS,fMinITSClusters); | |
273 | return kFALSE; | |
274 | } | |
275 | } | |
276 | if(fMaxChi2PerITSClusterFlag) { | |
277 | if(chi2PerClusterITS > fMaxChi2PerITSCluster) { | |
278 | if(fDebugMode) | |
279 | Printf("IsAccepted: Track rejected because it has a chi2 per ITS cluster %lf (max. requested: %lf)",chi2PerClusterITS,fMaxChi2PerITSCluster); | |
280 | return kFALSE; | |
281 | } | |
282 | } | |
283 | if(fMinTPCClustersFlag) { | |
284 | if(nClustersTPC < fMinTPCClusters) { | |
285 | if(fDebugMode) | |
286 | Printf("IsAccepted: Track rejected because it has %d TPC clusters (min. requested: %d)",nClustersTPC,fMinTPCClusters); | |
287 | return kFALSE; | |
288 | } | |
289 | } | |
290 | if(fMaxChi2PerTPCClusterFlag) { | |
291 | if(chi2PerClusterTPC > fMaxChi2PerTPCCluster) { | |
292 | if(fDebugMode) | |
293 | Printf("IsAccepted: Track rejected because it has a chi2 per TPC cluster %lf (max. requested: %lf)",chi2PerClusterTPC,fMaxChi2PerTPCCluster); | |
294 | return kFALSE; | |
295 | } | |
296 | } | |
297 | if(fMaxCov11Flag) { | |
298 | if(extCov[0] > fMaxCov11) { | |
299 | if(fDebugMode) | |
300 | Printf("IsAccepted: Track rejected because it has a cov11 value of %lf (max. requested: %lf)",extCov[0],fMaxCov11); | |
301 | return kFALSE; | |
302 | } | |
303 | } | |
304 | if(fMaxCov22Flag) { | |
305 | if(extCov[2] > fMaxCov22) { | |
306 | if(fDebugMode) | |
307 | Printf("IsAccepted: Track rejected because it has a cov22 value of %lf (max. requested: %lf)",extCov[2],fMaxCov22); | |
308 | return kFALSE; | |
309 | } | |
310 | } | |
311 | if(fMaxCov33Flag) { | |
312 | if(extCov[5] > fMaxCov33) { | |
313 | if(fDebugMode) | |
314 | Printf("IsAccepted: Track rejected because it has a cov33 value of %lf (max. requested: %lf)",extCov[5],fMaxCov33); | |
315 | return kFALSE; | |
316 | } | |
317 | } | |
318 | if(fMaxCov44Flag) { | |
319 | if(extCov[9] > fMaxCov44) { | |
320 | if(fDebugMode) | |
321 | Printf("IsAccepted: Track rejected because it has a cov44 value of %lf (max. requested: %lf)",extCov[9],fMaxCov44); | |
322 | return kFALSE; | |
323 | } | |
324 | } | |
325 | if(fMaxCov55Flag) { | |
326 | if(extCov[14] > fMaxCov55) { | |
327 | if(fDebugMode) | |
328 | Printf("IsAccepted: Track rejected because it has a cov55 value of %lf (max. requested: %lf)",extCov[14],fMaxCov55); | |
329 | return kFALSE; | |
330 | } | |
331 | } | |
332 | if(fMaxSigmaToVertexFlag) { | |
333 | if(GetSigmaToVertex(track) > fMaxSigmaToVertex) { | |
334 | if(fDebugMode) | |
335 | Printf("IsAccepted: Track rejected because it has a %lf sigmas to vertex (max. requested: %lf)",GetSigmaToVertex(track),fMaxSigmaToVertex); | |
336 | return kFALSE; | |
337 | } | |
338 | } | |
339 | if(fMaxSigmaToVertexTPCFlag) { | |
340 | if(GetSigmaToVertex(track) > fMaxSigmaToVertexTPC) { | |
341 | if(fDebugMode) | |
342 | Printf("IsAccepted: Track rejected because it has a %lf sigmas to vertex TPC (max. requested: %lf)",GetSigmaToVertex(track),fMaxSigmaToVertexTPC); | |
343 | return kFALSE; | |
344 | } | |
345 | } | |
346 | if(fMaxDCAXYFlag) { | |
347 | if(TMath::Abs(dca[0]) > fMaxDCAXY) { | |
348 | if(fDebugMode) | |
349 | Printf("IsAccepted: Track rejected because it has a value of dca(xy) of %lf (max. requested: %lf)",TMath::Abs(dca[0]),fMaxDCAXY); | |
350 | return kFALSE; | |
351 | } | |
352 | } | |
353 | if(fMaxDCAXYTPCFlag) { | |
354 | if(TMath::Abs(dca[0]) > fMaxDCAXYTPC) { | |
355 | if(fDebugMode) | |
356 | Printf("IsAccepted: Track rejected because it has a value of dca(xy) (TPC) of %lf (max. requested: %lf)",TMath::Abs(dca[0]),fMaxDCAXYTPC); | |
357 | return kFALSE; | |
358 | } | |
359 | } | |
360 | if(fMaxDCAZFlag) { | |
361 | if(TMath::Abs(dca[1]) > fMaxDCAZ) { | |
362 | if(fDebugMode) | |
363 | Printf("IsAccepted: Track rejected because it has a value of dca(z) of %lf (max. requested: %lf)",TMath::Abs(dca[1]),fMaxDCAZ); | |
364 | return kFALSE; | |
365 | } | |
366 | } | |
367 | if(fMaxDCAZTPCFlag) { | |
368 | if(TMath::Abs(dca[1]) > fMaxDCAZTPC) { | |
369 | if(fDebugMode) | |
370 | Printf("IsAccepted: Track rejected because it has a value of dca(z) (TPC) of %lf (max. requested: %lf)",TMath::Abs(dca[1]),fMaxDCAZTPC); | |
371 | return kFALSE; | |
372 | } | |
373 | } | |
374 | if(fMaxDCA3DFlag) { | |
375 | if(TMath::Abs(dca3D) > fMaxDCA3D) { | |
376 | if(fDebugMode) | |
377 | Printf("IsAccepted: Track rejected because it has a value of dca(3D) of %lf (max. requested: %lf)",TMath::Abs(dca3D),fMaxDCA3D); | |
378 | return kFALSE; | |
379 | } | |
380 | } | |
381 | if(fMaxDCA3DTPCFlag) { | |
382 | if(TMath::Abs(dca3D) > fMaxDCA3DTPC) { | |
383 | if(fDebugMode) | |
384 | Printf("IsAccepted: Track rejected because it has a value of dca(3D) (TPC) of %lf (max. requested: %lf)",TMath::Abs(dca3D),fMaxDCA3DTPC); | |
385 | return kFALSE; | |
386 | } | |
387 | } | |
388 | if(fMaxConstrainChi2Flag) { | |
389 | if(track->GetConstrainedChi2() > 0) | |
390 | if(TMath::Log(track->GetConstrainedChi2()) > fMaxConstrainChi2) { | |
391 | if(fDebugMode) | |
392 | Printf("IsAccepted: Track rejected because it has a value of the constrained chi2 to the vertex of %lf (max. requested: %lf)",TMath::Log(track->GetConstrainedChi2()),fMaxConstrainChi2); | |
393 | return kFALSE; | |
394 | } | |
395 | } | |
87a55728 | 396 | if(fMinTPCdEdxPointsFlag) { |
397 | if(track->GetTPCsignalN() < fMinTPCdEdxPoints) { | |
398 | if(fDebugMode) | |
399 | Printf("IsAccepted: Track rejected because it has %d TPC points for the calculation of the energy loss (min. requested: %d)",track->GetTPCsignalN(),fMinTPCdEdxPoints); | |
400 | return kFALSE; | |
401 | } | |
402 | } | |
0ab648ea | 403 | if(fITSRefitFlag) { |
404 | if ((track->GetStatus() & AliESDtrack::kITSrefit) == 0) { | |
405 | if(fDebugMode) | |
406 | Printf("IsAccepted: Track rejected because it has no ITS refit flag"); | |
407 | return kFALSE; | |
408 | } | |
409 | } | |
410 | if(fTPCRefitFlag) { | |
411 | if ((track->GetStatus() & AliESDtrack::kTPCrefit) == 0) { | |
412 | if(fDebugMode) | |
413 | Printf("IsAccepted: Track rejected because it has no TPC refit flag"); | |
414 | return kFALSE; | |
415 | } | |
416 | } | |
417 | if(fESDpidFlag) { | |
418 | if ((track->GetStatus() & AliESDtrack::kESDpid) == 0) { | |
419 | if(fDebugMode) | |
420 | Printf("IsAccepted: Track rejected because it has no ESD pid flag"); | |
421 | return kFALSE; | |
422 | } | |
423 | } | |
424 | if(fTPCpidFlag) { | |
425 | if ((track->GetStatus() & AliESDtrack::kTPCpid) == 0) { | |
426 | if(fDebugMode) | |
427 | Printf("IsAccepted: Track rejected because it has no TPC pid flag"); | |
428 | return kFALSE; | |
429 | } | |
430 | } | |
431 | ||
432 | return kTRUE; | |
433 | } | |
434 | ||
435 | //____________________________________________________________________// | |
436 | Float_t AliProtonAnalysisBase::GetSigmaToVertex(AliESDtrack* esdTrack) const { | |
437 | // Calculates the number of sigma to the vertex. | |
438 | ||
439 | Float_t b[2]; | |
440 | Float_t bRes[2]; | |
441 | Float_t bCov[3]; | |
442 | if((kTPC)&&(!kHybrid)) | |
443 | esdTrack->GetImpactParametersTPC(b,bCov); | |
444 | else | |
445 | esdTrack->GetImpactParameters(b,bCov); | |
446 | ||
447 | if (bCov[0]<=0 || bCov[2]<=0) { | |
448 | //AliDebug(1, "Estimated b resolution lower or equal zero!"); | |
449 | bCov[0]=0; bCov[2]=0; | |
450 | } | |
451 | bRes[0] = TMath::Sqrt(bCov[0]); | |
452 | bRes[1] = TMath::Sqrt(bCov[2]); | |
453 | ||
454 | if (bRes[0] == 0 || bRes[1] ==0) return -1; | |
455 | ||
456 | Float_t d = TMath::Sqrt(TMath::Power(b[0]/bRes[0],2) + TMath::Power(b[1]/bRes[1],2)); | |
457 | ||
458 | if (TMath::Exp(-d * d / 2) < 1e-10) return 1000; | |
459 | ||
460 | d = TMath::ErfInverse(1 - TMath::Exp(-d * d / 2)) * TMath::Sqrt(2); | |
461 | ||
462 | return d; | |
463 | } | |
464 | ||
465 | //____________________________________________________________________// | |
466 | Double_t AliProtonAnalysisBase::Rapidity(Double_t gPx, | |
467 | Double_t gPy, | |
468 | Double_t gPz) const { | |
469 | //returns the rapidity of the proton - to be removed | |
470 | Double_t fMass = 9.38270000000000048e-01; | |
471 | ||
472 | Double_t gP = TMath::Sqrt(TMath::Power(gPx,2) + | |
473 | TMath::Power(gPy,2) + | |
474 | TMath::Power(gPz,2)); | |
475 | Double_t energy = TMath::Sqrt(gP*gP + fMass*fMass); | |
476 | Double_t y = -999; | |
477 | if(energy != gPz) | |
478 | y = 0.5*TMath::Log((energy + gPz)/(energy - gPz)); | |
479 | ||
480 | return y; | |
481 | } | |
482 | ||
483 | //________________________________________________________________________ | |
484 | const AliESDVertex* AliProtonAnalysisBase::GetVertex(AliESDEvent* esd, | |
485 | AnalysisMode mode, | |
486 | Double_t gVxMax, | |
487 | Double_t gVyMax, | |
488 | Double_t gVzMax) { | |
489 | // Get the vertex from the ESD and returns it if the vertex is valid | |
490 | // Second argument decides which vertex is used (this selects | |
491 | // also the quality criteria that are applied) | |
492 | const AliESDVertex* vertex = 0; | |
493 | if(mode == kHybrid) | |
494 | vertex = esd->GetPrimaryVertexSPD(); | |
495 | else if(mode == kTPC){ | |
496 | Double_t kBz = esd->GetMagneticField(); | |
497 | AliVertexerTracks vertexer(kBz); | |
498 | vertexer.SetTPCMode(); | |
499 | AliESDVertex *vTPC = vertexer.FindPrimaryVertex(esd); | |
500 | esd->SetPrimaryVertexTPC(vTPC); | |
501 | for (Int_t i=0; i<esd->GetNumberOfTracks(); i++) { | |
502 | AliESDtrack *t = esd->GetTrack(i); | |
503 | t->RelateToVertexTPC(vTPC, kBz, kVeryBig); | |
504 | } | |
505 | delete vTPC; | |
506 | vertex = esd->GetPrimaryVertexTPC(); | |
507 | } | |
508 | else if(mode == kGlobal) | |
509 | vertex = esd->GetPrimaryVertex(); | |
510 | else | |
511 | Printf("GetVertex: ERROR: Invalid second argument %d", mode); | |
512 | ||
513 | if(!vertex) { | |
514 | if(fDebugMode) | |
515 | Printf("GetVertex: Event rejected because there is no valid vertex object"); | |
516 | return 0; | |
517 | } | |
518 | ||
519 | // check Ncontributors | |
520 | if(vertex->GetNContributors() <= 0) { | |
521 | if(fDebugMode) | |
522 | Printf("GetVertex: Event rejected because the number of contributors for the vertex determination is <= 0"); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | // check resolution | |
527 | Double_t zRes = vertex->GetZRes(); | |
528 | if(zRes == 0) { | |
529 | if(fDebugMode) | |
530 | Printf("GetVertex: Event rejected because the value of the vertex resolution in z is 0"); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | //check position | |
535 | if(TMath::Abs(vertex->GetXv()) > gVxMax) { | |
536 | if(fDebugMode) | |
537 | Printf("GetVertex: Event rejected because it has a Vx value of %lf cm (accepted interval: -%lf - %lf)",TMath::Abs(vertex->GetXv()),gVxMax,gVxMax); | |
538 | return 0; | |
539 | } | |
540 | if(TMath::Abs(vertex->GetYv()) > gVyMax) { | |
541 | if(fDebugMode) | |
542 | Printf("GetVertex: Event rejected because it has a Vy value of %lf cm (accepted interval: -%lf - %lf)",TMath::Abs(vertex->GetYv()),gVyMax,gVyMax); | |
543 | return 0; | |
544 | } | |
545 | if(TMath::Abs(vertex->GetZv()) > gVzMax) { | |
546 | if(fDebugMode) | |
547 | Printf("GetVertex: Event rejected because it has a Vz value of %lf cm (accepted interval: -%lf - %lf)",TMath::Abs(vertex->GetZv()),gVzMax,gVzMax); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | return vertex; | |
552 | } | |
553 | ||
554 | //________________________________________________________________________ | |
555 | Bool_t AliProtonAnalysisBase::IsEventTriggered(const AliESDEvent *esd, | |
556 | TriggerMode trigger) { | |
557 | // check if the event was triggered | |
558 | ULong64_t triggerMask = esd->GetTriggerMask(); | |
559 | ||
560 | // definitions from p-p.cfg | |
561 | ULong64_t spdFO = (1 << 14); | |
562 | ULong64_t v0left = (1 << 11); | |
563 | ULong64_t v0right = (1 << 12); | |
564 | ||
565 | switch (trigger) { | |
566 | case kMB1: { | |
567 | if (triggerMask & spdFO || ((triggerMask & v0left) || (triggerMask & v0right))) | |
568 | return kTRUE; | |
569 | break; | |
570 | } | |
571 | case kMB2: { | |
572 | if (triggerMask & spdFO && ((triggerMask & v0left) || (triggerMask & v0right))) | |
573 | return kTRUE; | |
574 | break; | |
575 | } | |
576 | case kSPDFASTOR: { | |
577 | if (triggerMask & spdFO) | |
578 | return kTRUE; | |
579 | break; | |
580 | } | |
581 | }//switch | |
582 | ||
583 | return kFALSE; | |
584 | } | |
585 | ||
586 | //________________________________________________________________________ | |
587 | TCanvas *AliProtonAnalysisBase::GetListOfCuts() { | |
588 | // return the list of cuts and their cut values for reference | |
589 | TLatex l; | |
590 | l.SetTextAlign(12); | |
591 | l.SetTextSize(0.04); | |
592 | ||
593 | TString listOfCuts; | |
594 | ||
595 | TCanvas *c = new TCanvas("cListOfCuts","List of cuts",0,0,900,600); | |
596 | c->SetFillColor(10); c->SetHighLightColor(41); | |
597 | c->Divide(3,2); | |
598 | ||
599 | c->cd(1)->SetFillColor(10); | |
600 | l.DrawLatex(0.3,0.9,"Analysis details: List of cuts\n\n"); | |
601 | ||
602 | listOfCuts = "Analysis level: "; listOfCuts += fProtonAnalysisLevel; | |
603 | l.DrawLatex(0.1,0.82,listOfCuts.Data()); | |
604 | listOfCuts = "Analysis mode: "; | |
605 | if(fProtonAnalysisMode == kTPC) listOfCuts += "TPC standalone"; | |
606 | if(fProtonAnalysisMode == kHybrid) listOfCuts += "Hybrid TPC"; | |
607 | if(fProtonAnalysisMode == kGlobal) listOfCuts += "Global tracking"; | |
608 | l.DrawLatex(0.1,0.74,listOfCuts.Data()); | |
609 | listOfCuts = "Trigger mode: "; | |
610 | if(fTriggerMode == kMB1) listOfCuts += "Minimum bias 1"; | |
611 | if(fTriggerMode == kMB2) listOfCuts += "Minimum bias 2"; | |
612 | if(fTriggerMode == kSPDFASTOR) listOfCuts += "FastOR (SPD)"; | |
613 | l.DrawLatex(0.1,0.66,listOfCuts.Data()); | |
614 | listOfCuts = "PID mode: "; | |
615 | if(fProtonPIDMode == kBayesian) listOfCuts += "Bayesian PID"; | |
616 | if(fProtonPIDMode == kRatio) listOfCuts += "Z = ln((dE/dx)_{exp.}/(dE/dx)_{theor.})"; | |
87a55728 | 617 | if(fProtonPIDMode == kSigma1) { |
618 | listOfCuts += "N_{#sigma}(1) area: "; listOfCuts += fNSigma; | |
619 | listOfCuts += " #sigma"; | |
620 | } | |
621 | if(fProtonPIDMode == kSigma2) { | |
622 | listOfCuts += "N_{#sigma}(2) area: "; listOfCuts += fNSigma; | |
623 | listOfCuts += " #sigma"; | |
624 | } | |
0ab648ea | 625 | l.DrawLatex(0.1,0.58,listOfCuts.Data()); |
626 | listOfCuts = "Accepted vertex diamond: "; | |
627 | l.DrawLatex(0.1,0.5,listOfCuts.Data()); | |
628 | listOfCuts = "|V_{x}| < "; listOfCuts += fVxMax; listOfCuts += " [cm]"; | |
629 | l.DrawLatex(0.6,0.5,listOfCuts.Data()); | |
630 | listOfCuts = "|V_{y}| < "; listOfCuts += fVyMax; listOfCuts += " [cm]"; | |
631 | l.DrawLatex(0.6,0.4,listOfCuts.Data()); | |
632 | listOfCuts = "|V_{z}| < "; listOfCuts += fVzMax; listOfCuts += " [cm]"; | |
633 | l.DrawLatex(0.6,0.3,listOfCuts.Data()); | |
634 | listOfCuts = "Phase space: "; | |
635 | l.DrawLatex(0.1,0.2,listOfCuts.Data()); | |
636 | if(fAnalysisEtaMode) listOfCuts = "|#eta| < "; | |
637 | else listOfCuts = "|y| < "; | |
638 | listOfCuts += TMath::Abs(fMinX); | |
639 | l.DrawLatex(0.35,0.2,listOfCuts.Data()); | |
640 | listOfCuts = "N_{bins} = "; | |
641 | listOfCuts += fNBinsX; listOfCuts += " (binning: "; | |
642 | listOfCuts += (fMaxX-fMinX)/fNBinsX; listOfCuts += ")"; | |
643 | l.DrawLatex(0.35,0.15,listOfCuts.Data()); | |
644 | listOfCuts = ""; listOfCuts += fMinY; listOfCuts += " < P_{T} < "; | |
645 | listOfCuts += fMaxY; listOfCuts += "GeV/c"; | |
646 | l.DrawLatex(0.35,0.1,listOfCuts.Data()); | |
647 | listOfCuts = "N_{bins} = "; | |
648 | listOfCuts += fNBinsY; listOfCuts += " (binning: "; | |
649 | listOfCuts += (fMaxY-fMinY)/fNBinsY; listOfCuts += ")"; | |
650 | l.DrawLatex(0.35,0.05,listOfCuts.Data()); | |
651 | ||
652 | c->cd(2)->SetFillColor(2); | |
653 | l.DrawLatex(0.3,0.9,"ITS related cuts"); | |
654 | listOfCuts = "Request a cluster on SPD1: "; | |
655 | listOfCuts += fPointOnITSLayer1Flag; | |
656 | l.DrawLatex(0.1,0.8,listOfCuts.Data()); | |
657 | listOfCuts = "Request a cluster on SPD2: "; | |
658 | listOfCuts += fPointOnITSLayer2Flag; | |
659 | l.DrawLatex(0.1,0.7,listOfCuts.Data()); | |
660 | listOfCuts = "Request a cluster on SDD1: "; | |
661 | listOfCuts += fPointOnITSLayer3Flag; | |
662 | l.DrawLatex(0.1,0.6,listOfCuts.Data()); | |
663 | listOfCuts = "Request a cluster on SDD2: "; | |
664 | listOfCuts += fPointOnITSLayer4Flag; | |
665 | l.DrawLatex(0.1,0.5,listOfCuts.Data()); | |
666 | listOfCuts = "Request a cluster on SSD1: "; | |
667 | listOfCuts += fPointOnITSLayer5Flag; | |
668 | l.DrawLatex(0.1,0.4,listOfCuts.Data()); | |
669 | listOfCuts = "Request a cluster on SSD2: "; | |
670 | listOfCuts += fPointOnITSLayer6Flag; | |
671 | l.DrawLatex(0.1,0.3,listOfCuts.Data()); | |
672 | listOfCuts = "Minimum number of ITS clusters: "; | |
673 | if(fMinITSClustersFlag) listOfCuts += fMinITSClusters; | |
674 | else listOfCuts += "Not used"; | |
675 | l.DrawLatex(0.1,0.2,listOfCuts.Data()); | |
676 | listOfCuts = "Maximum #chi^{2} per ITS cluster: "; | |
677 | if(fMaxChi2PerITSClusterFlag) listOfCuts += fMaxChi2PerITSCluster; | |
678 | else listOfCuts += "Not used"; | |
679 | l.DrawLatex(0.1,0.1,listOfCuts.Data()); | |
680 | ||
681 | c->cd(3)->SetFillColor(3); | |
682 | l.DrawLatex(0.3,0.9,"TPC related cuts"); | |
683 | listOfCuts = "Minimum number of TPC clusters: "; | |
684 | if(fMinTPCClustersFlag) listOfCuts += fMinTPCClusters; | |
685 | else listOfCuts += "Not used"; | |
686 | l.DrawLatex(0.1,0.7,listOfCuts.Data()); | |
687 | listOfCuts = "Maximum #chi^{2} per TPC cluster: "; | |
688 | if(fMaxChi2PerTPCClusterFlag) listOfCuts += fMaxChi2PerTPCCluster; | |
689 | else listOfCuts += "Not used"; | |
690 | l.DrawLatex(0.1,0.5,listOfCuts.Data()); | |
57e749bb | 691 | listOfCuts = "Minimum number of TPC points for the dE/dx: "; |
692 | if(fMinTPCdEdxPointsFlag) listOfCuts += fMinTPCdEdxPoints; | |
693 | else listOfCuts += "Not used"; | |
694 | l.DrawLatex(0.1,0.3,listOfCuts.Data()); | |
0ab648ea | 695 | |
696 | c->cd(4)->SetFillColor(4); | |
697 | l.DrawLatex(0.3,0.9,"Tracking related cuts"); | |
698 | listOfCuts = "Maximum cov11: "; | |
699 | if(fMaxCov11Flag) listOfCuts += fMaxCov11; | |
700 | else listOfCuts += "Not used"; | |
701 | l.DrawLatex(0.1,0.75,listOfCuts.Data()); | |
702 | listOfCuts = "Maximum cov22: "; | |
703 | if(fMaxCov22Flag) listOfCuts += fMaxCov22; | |
704 | else listOfCuts += "Not used"; | |
705 | l.DrawLatex(0.1,0.6,listOfCuts.Data()); | |
706 | listOfCuts = "Maximum cov33: "; | |
707 | if(fMaxCov33Flag) listOfCuts += fMaxCov33; | |
708 | else listOfCuts += "Not used"; | |
709 | l.DrawLatex(0.1,0.45,listOfCuts.Data()); | |
710 | listOfCuts = "Maximum cov44: "; | |
711 | if(fMaxCov44Flag) listOfCuts += fMaxCov44; | |
712 | else listOfCuts += "Not used"; | |
713 | l.DrawLatex(0.1,0.3,listOfCuts.Data()); | |
714 | listOfCuts = "Maximum cov55: "; | |
715 | if(fMaxCov55Flag) listOfCuts += fMaxCov55; | |
716 | else listOfCuts += "Not used"; | |
717 | l.DrawLatex(0.1,0.15,listOfCuts.Data()); | |
718 | ||
719 | c->cd(5)->SetFillColor(5); | |
720 | l.DrawLatex(0.3,0.9,"DCA related cuts"); | |
721 | listOfCuts = "Maximum sigma to vertex: "; | |
722 | if(fMaxSigmaToVertexFlag) listOfCuts += fMaxSigmaToVertex; | |
723 | else listOfCuts += "Not used"; | |
724 | l.DrawLatex(0.1,0.8,listOfCuts.Data()); | |
725 | listOfCuts = "Maximum sigma to vertex (TPC): "; | |
726 | if(fMaxSigmaToVertexTPCFlag) listOfCuts += fMaxSigmaToVertexTPC; | |
727 | else listOfCuts += "Not used"; | |
728 | l.DrawLatex(0.1,0.72,listOfCuts.Data()); | |
729 | listOfCuts = "Maximum DCA in xy: "; | |
730 | if(fMaxDCAXYFlag) listOfCuts += fMaxDCAXY; | |
731 | else listOfCuts += "Not used"; | |
732 | l.DrawLatex(0.1,0.64,listOfCuts.Data()); | |
733 | listOfCuts = "Maximum DCA in z: "; | |
734 | if(fMaxDCAZFlag) listOfCuts += fMaxDCAZ; | |
735 | else listOfCuts += "Not used"; | |
736 | l.DrawLatex(0.1,0.56,listOfCuts.Data()); | |
737 | listOfCuts = "Maximum DCA in 3D: "; | |
738 | if(fMaxDCA3DFlag) listOfCuts += fMaxDCA3D; | |
739 | else listOfCuts += "Not used"; | |
740 | l.DrawLatex(0.1,0.48,listOfCuts.Data()); | |
741 | listOfCuts = "Maximum DCA in xy (TPC): "; | |
742 | if(fMaxDCAXYFlag) listOfCuts += fMaxDCAXYTPC; | |
743 | else listOfCuts += "Not used"; | |
744 | l.DrawLatex(0.1,0.4,listOfCuts.Data()); | |
745 | listOfCuts = "Maximum DCA in z (TPC): "; | |
746 | if(fMaxDCAZFlag) listOfCuts += fMaxDCAZTPC; | |
747 | else listOfCuts += "Not used"; | |
748 | l.DrawLatex(0.1,0.32,listOfCuts.Data()); | |
749 | listOfCuts = "Maximum DCA in 3D (TPC): "; | |
750 | if(fMaxDCA3DFlag) listOfCuts += fMaxDCA3DTPC; | |
751 | else listOfCuts += "Not used"; | |
752 | l.DrawLatex(0.1,0.24,listOfCuts.Data()); | |
753 | listOfCuts = "Maximum constrained #chi^{2} (vertex): "; | |
754 | if(fMaxConstrainChi2Flag) listOfCuts += fMaxConstrainChi2; | |
755 | else listOfCuts += "Not used"; | |
756 | l.DrawLatex(0.1,0.16,listOfCuts.Data()); | |
757 | ||
758 | c->cd(6)->SetFillColor(6); | |
759 | l.DrawLatex(0.3,0.9,"Tracking bits related cuts"); | |
760 | listOfCuts = "Request the ITS refit bit: "; listOfCuts += fITSRefitFlag; | |
761 | l.DrawLatex(0.1,0.7,listOfCuts.Data()); | |
762 | listOfCuts = "Request the TPC refit bit: "; listOfCuts += fTPCRefitFlag; | |
763 | l.DrawLatex(0.1,0.5,listOfCuts.Data()); | |
764 | listOfCuts = "Request the TPC pid bit: "; listOfCuts += fTPCpidFlag; | |
765 | l.DrawLatex(0.1,0.3,listOfCuts.Data()); | |
766 | listOfCuts = "Request the ESD pid bit: "; listOfCuts += fESDpidFlag; | |
767 | l.DrawLatex(0.1,0.1,listOfCuts.Data()); | |
768 | ||
769 | return c; | |
770 | } | |
771 | ||
772 | //________________________________________________________________________ | |
773 | Bool_t AliProtonAnalysisBase::IsProton(AliESDtrack *track) { | |
774 | //Function that checks if a track is a proton | |
775 | Double_t probability[5]; | |
87a55728 | 776 | Double_t gPt = 0.0, gP = 0.0, gEta = 0.0; |
0ab648ea | 777 | Long64_t fParticleType = 0; |
778 | ||
779 | //Bayesian approach for the PID | |
780 | if(fProtonPIDMode == kBayesian) { | |
781 | if((fProtonAnalysisMode == kTPC)||(fProtonAnalysisMode == kHybrid)) { | |
782 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
783 | if(tpcTrack) { | |
784 | gPt = tpcTrack->Pt(); | |
785 | gP = tpcTrack->P(); | |
786 | track->GetTPCpid(probability); | |
787 | } | |
788 | }//TPC standalone or Hybrid TPC | |
789 | else if(fProtonAnalysisMode == kGlobal) { | |
790 | gPt = track->Pt(); | |
791 | gP = track->P(); | |
792 | track->GetESDpid(probability); | |
793 | }//Global tracking | |
794 | ||
795 | Double_t rcc = 0.0; | |
796 | for(Int_t i = 0; i < AliPID::kSPECIES; i++) | |
797 | rcc += probability[i]*GetParticleFraction(i,gP); | |
798 | if(rcc != 0.0) { | |
799 | Double_t w[5]; | |
800 | for(Int_t i = 0; i < AliPID::kSPECIES; i++) | |
801 | w[i] = probability[i]*GetParticleFraction(i,gP)/rcc; | |
802 | fParticleType = TMath::LocMax(AliPID::kSPECIES,w); | |
803 | } | |
804 | if(fParticleType == 4) | |
805 | return kTRUE; | |
806 | } | |
807 | //Ratio of the measured over the theoretical dE/dx a la STAR | |
808 | else if(fProtonPIDMode == kRatio) { | |
809 | Printf("The kRatio mode is not implemented yet!!!"); | |
810 | return kFALSE; | |
811 | } | |
812 | //Definition of an N-sigma area around the dE/dx vs P band | |
87a55728 | 813 | else if(fProtonPIDMode == kSigma1) { |
814 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
815 | if(tpcTrack) { | |
816 | gPt = tpcTrack->Pt(); | |
817 | gP = tpcTrack->P(); | |
818 | gEta = tpcTrack->Eta(); | |
819 | } | |
820 | //We start the P slices at >0.3GeV/c with a bining of 50MeV/c ==> Int_t(0.3001/0.05) = 6 | |
821 | Int_t nbinP = Int_t(gP/0.05) - 6; | |
822 | Double_t tpcSignal = track->GetTPCsignal(); | |
823 | Double_t dEdxMean = fdEdxMean[nbinP]; | |
824 | Double_t dEdxSigma = fdEdxSigma[nbinP]; | |
825 | if((tpcSignal <= dEdxMean + fNSigma*dEdxSigma)&& | |
826 | (tpcSignal <= dEdxMean + fNSigma*dEdxSigma)) | |
827 | return kTRUE; | |
828 | }//kSigma1 PID method | |
829 | //Another definition of an N-sigma area around the dE/dx vs P band | |
830 | else if(fProtonPIDMode == kSigma2) { | |
831 | AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam(); | |
832 | if(tpcTrack) { | |
833 | gPt = tpcTrack->Pt(); | |
834 | gP = tpcTrack->P(); | |
835 | gEta = tpcTrack->Eta(); | |
836 | } | |
837 | //We start the P slices at >0.3GeV/c with a bining of 50MeV/c ==> Int_t(0.3001/0.05) = 6 | |
838 | Int_t nbinP = Int_t(gP/0.05) - 6; | |
839 | Double_t tpcSignal = track->GetTPCsignal(); | |
840 | Double_t dEdxTheory = Bethe(gP/9.38270000000000048e-01); | |
841 | Double_t dEdxSigma = fdEdxSigma[nbinP]; | |
842 | Double_t nsigma = TMath::Abs(tpcSignal - dEdxTheory)/(tpcSignal*(dEdxSigma/TMath::Sqrt(track->GetTPCsignalN()))); | |
843 | if(nsigma <= fNSigma) | |
844 | return kTRUE; | |
0ab648ea | 845 | } |
846 | ||
847 | return kFALSE; | |
848 | } | |
849 | ||
87a55728 | 850 | //________________________________________________________________________ |
851 | void AliProtonAnalysisBase::SetdEdxBandInfo(const char *filename) { | |
852 | // This function is used in case the kSigma1 or kSigma2 PID mode is selected | |
853 | // It takes as an argument the name of the ascii file (for the time being) | |
854 | // that is generated as a prior process. | |
855 | // This ascii file has three columns: The min. P value (bins of 50MeV/c) | |
856 | // the mean and the sigma of the dE/dx distributions for protons coming | |
857 | // from a gaussian fit. | |
858 | ifstream in; | |
859 | in.open(filename); | |
860 | ||
861 | Double_t gPtMin = 0.0; | |
862 | Int_t iCounter = 0; | |
863 | while(in.good()) { | |
864 | in >> gPtMin >> fdEdxMean[iCounter] >> fdEdxSigma[iCounter]; | |
865 | if(fDebugMode) | |
866 | Printf("Momentum bin: %d - Min momentum: %lf - mean(dE/dx): %lf - sigma(dE/dx): %lf",iCounter+1,gPtMin,fdEdxMean[iCounter],fdEdxSigma[iCounter]); | |
867 | iCounter += 1; | |
868 | } | |
869 | } | |
870 | ||
871 | //________________________________________________________________________ | |
73aba974 | 872 | Double_t AliProtonAnalysisBase::Bethe(Double_t bg) const { |
87a55728 | 873 | // This is the Bethe-Bloch function normalised to 1 at the minimum |
874 | // We renormalize it based on the MC information | |
875 | // WARNING: To be revised soon!!! | |
876 | // This is just a temporary fix | |
877 | Double_t normalization = 49.2; | |
878 | Double_t bg2=bg*bg; | |
879 | Double_t beta2 = bg2/(1.+ bg2); | |
880 | Double_t bb = 8.62702e-2*(9.14550 - beta2 - TMath::Log(3.51000e-5 + 1./bg2))/beta2; | |
881 | // | |
882 | const Float_t kmeanCorrection =0.1; | |
883 | Double_t meanCorrection =(1+(bb-1)*kmeanCorrection); | |
884 | bb *= meanCorrection; | |
885 | ||
886 | return normalization*bb; | |
887 | } | |
0ab648ea | 888 | |
889 |