]>
Commit | Line | Data |
---|---|---|
3a9a3487 | 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 | // Implementation of the D0toKpi reconstruction and analysis class | |
3a9a3487 | 18 | // Note: the two decay tracks are labelled: 0 (positive track) |
19 | // 1 (negative track) | |
e6e6531b | 20 | // An example of usage can be found in the macro AliD0toKpiTest.C |
ef0182f7 | 21 | // Origin: A. Dainese andrea.dainese@lnl.infn.it |
3a9a3487 | 22 | //---------------------------------------------------------------------------- |
3a9a3487 | 23 | #include <TKey.h> |
24 | #include <TFile.h> | |
25 | #include <TTree.h> | |
26 | #include <TString.h> | |
27 | #include <TSystem.h> | |
28 | #include <TParticle.h> | |
29 | #include "AliESD.h" | |
ef0182f7 | 30 | #include "AliMC.h" |
31 | #include "AliRun.h" | |
3a9a3487 | 32 | #include "AliRunLoader.h" |
ef0182f7 | 33 | #include "AliVertexerTracks.h" |
d681bb2d | 34 | #include "AliESDVertex.h" |
c7bafca9 | 35 | #include "AliESDv0.h" |
3a9a3487 | 36 | #include "AliD0toKpi.h" |
37 | #include "AliD0toKpiAnalysis.h" | |
59c6807d | 38 | #include "AliLog.h" |
3a9a3487 | 39 | |
40 | typedef struct { | |
41 | Int_t lab; | |
42 | Int_t pdg; | |
43 | Int_t mumlab; | |
44 | Int_t mumpdg; | |
ef0182f7 | 45 | Int_t mumprongs; |
3a9a3487 | 46 | Float_t Vx,Vy,Vz; |
47 | Float_t Px,Py,Pz; | |
48 | } REFTRACK; | |
49 | ||
50 | ClassImp(AliD0toKpiAnalysis) | |
51 | ||
52 | //---------------------------------------------------------------------------- | |
53 | AliD0toKpiAnalysis::AliD0toKpiAnalysis() { | |
54 | // Default constructor | |
ef0182f7 | 55 | |
3a9a3487 | 56 | SetPtCut(); |
57 | Setd0Cut(); | |
58 | SetMassCut(); | |
59 | SetD0Cuts(); | |
60 | SetVertex1(); | |
61 | SetPID(); | |
62 | fVertexOnTheFly = kFALSE; | |
63 | fSim = kFALSE; | |
64 | fOnlySignal = kFALSE; | |
3a9a3487 | 65 | } |
66 | //---------------------------------------------------------------------------- | |
67 | AliD0toKpiAnalysis::~AliD0toKpiAnalysis() {} | |
68 | //---------------------------------------------------------------------------- | |
69 | void AliD0toKpiAnalysis::ApplySelection(const Char_t *inName,const Char_t *outName) const { | |
70 | // select candidates that pass fD0Cuts and write them to a new file | |
71 | ||
72 | TFile *inFile = TFile::Open(inName); | |
73 | ||
74 | TTree *treeD0in=(TTree*)inFile->Get("TreeD0"); | |
75 | AliD0toKpiAnalysis *inAnalysis = (AliD0toKpiAnalysis*)inFile->Get("D0toKpiAnalysis"); | |
76 | printf("+++\n+++ I N P U T S T A T U S:\n+++\n"); | |
77 | inAnalysis->PrintStatus(); | |
78 | ||
79 | ||
80 | AliD0toKpi *d = 0; | |
81 | treeD0in->SetBranchAddress("D0toKpi",&d); | |
82 | Int_t entries = (Int_t)treeD0in->GetEntries(); | |
83 | ||
84 | printf("+++\n+++ Number of D0 in input tree: %d\n+++\n",entries); | |
85 | ||
86 | TTree *treeD0out = new TTree("TreeD0","Tree with selected D0 candidates"); | |
87 | treeD0out->Branch("D0toKpi","AliD0toKpi",&d,200000,0); | |
88 | ||
89 | ||
90 | Int_t okD0=0,okD0bar=0; | |
91 | Int_t nSel = 0; | |
92 | ||
93 | for(Int_t i=0; i<entries; i++) { | |
94 | // get event from tree | |
95 | treeD0in->GetEvent(i); | |
96 | ||
97 | if(fSim && fOnlySignal && !d->IsSignal()) continue; | |
98 | ||
99 | // check if candidate passes selection (as D0 or D0bar) | |
100 | if(d->Select(fD0Cuts,okD0,okD0bar)) { | |
101 | nSel++; | |
102 | treeD0out->Fill(); | |
103 | } | |
104 | ||
105 | } | |
106 | ||
107 | AliD0toKpiAnalysis *outAnalysis = (AliD0toKpiAnalysis*)inAnalysis->Clone("D0toKpiAnalysis"); | |
108 | outAnalysis->SetD0Cuts(fD0Cuts); | |
109 | printf("------------------------------------------\n"); | |
110 | printf("+++\n+++ O U T P U T S T A T U S:\n+++\n"); | |
111 | outAnalysis->PrintStatus(); | |
112 | ||
113 | printf("+++\n+++ Number of D0 in output tree: %d\n+++\n",nSel); | |
114 | ||
115 | TFile* outFile = new TFile(outName,"recreate"); | |
116 | treeD0out->Write(); | |
117 | outAnalysis->Write(); | |
118 | outFile->Close(); | |
119 | ||
120 | return; | |
121 | } | |
122 | //---------------------------------------------------------------------------- | |
123 | Double_t AliD0toKpiAnalysis::CalculateTOFmass(Double_t mom,Double_t length, | |
124 | Double_t time) const { | |
125 | // calculated the mass from momentum, track length from vertex to TOF | |
126 | // and time measured by the TOF | |
127 | if(length==0.) return -1000.; | |
128 | Double_t a = time*time/length/length; | |
129 | if(a > 1.) { | |
130 | a = TMath::Sqrt(a-1.); | |
131 | } else { | |
132 | a = -TMath::Sqrt(1.-a); | |
133 | } | |
134 | ||
135 | return mom*a; | |
136 | } | |
137 | //---------------------------------------------------------------------------- | |
138 | void AliD0toKpiAnalysis::FindCandidates(Int_t evFirst,Int_t evLast, | |
139 | const Char_t *outName) { | |
140 | // Find D0 candidates and calculate parameters | |
141 | ||
3a9a3487 | 142 | |
ef0182f7 | 143 | TString esdName="AliESDs.root"; |
3a9a3487 | 144 | if(gSystem->AccessPathName(esdName.Data(),kFileExists)) { |
145 | printf("AliD0toKpiAnalysis::FindCandidatesESD(): No ESDs file found!\n"); | |
146 | return; | |
147 | } | |
148 | ||
149 | TString outName1=outName; | |
ef0182f7 | 150 | TString outName2="nTotEvents.dat"; |
3a9a3487 | 151 | |
3a9a3487 | 152 | Int_t nTotEv=0,nD0rec=0,nD0rec1ev=0; |
153 | Double_t dca; | |
154 | Double_t v2[3],mom[6],d0[2]; | |
3a9a3487 | 155 | Int_t iTrkP,iTrkN,trkEntries; |
156 | Int_t nTrksP=0,nTrksN=0; | |
157 | Int_t trkNum[2]; | |
158 | Double_t tofmass[2]; | |
159 | Int_t okD0=0,okD0bar=0; | |
c7bafca9 | 160 | AliESDtrack *postrack = 0; |
161 | AliESDtrack *negtrack = 0; | |
3a9a3487 | 162 | |
ef0182f7 | 163 | // create the AliVertexerTracks object |
3a9a3487 | 164 | // (it will be used only if fVertexOnTheFly=kTrue) |
ef0182f7 | 165 | AliVertexerTracks *vertexer1 = new AliVertexerTracks; |
166 | if(fVertexOnTheFly) { | |
167 | // open the mean vertex | |
168 | TFile *invtx = new TFile("AliESDVertexMean.root"); | |
169 | AliESDVertex *initVertex = (AliESDVertex*)invtx->Get("vtxmean"); | |
170 | invtx->Close(); | |
171 | vertexer1->SetVtxStart(initVertex); | |
172 | delete invtx; | |
173 | } | |
3a9a3487 | 174 | Int_t skipped[2]; |
175 | Bool_t goodVtx1; | |
176 | ||
3a9a3487 | 177 | // create tree for reconstructed D0s |
178 | AliD0toKpi *ioD0toKpi=0; | |
179 | TTree *treeD0 = new TTree("TreeD0","Tree with D0 candidates"); | |
180 | treeD0->Branch("D0toKpi","AliD0toKpi",&ioD0toKpi,200000,0); | |
181 | ||
182 | // open file with tracks | |
183 | TFile *esdFile = TFile::Open(esdName.Data()); | |
e6e6531b | 184 | AliESD* event = new AliESD; |
185 | TTree* tree = (TTree*) esdFile->Get("esdTree"); | |
ef0182f7 | 186 | if(!tree) { |
e6e6531b | 187 | Error("FindCandidatesESD", "no ESD tree found"); |
188 | return; | |
189 | } | |
ef0182f7 | 190 | tree->SetBranchAddress("ESD",&event); |
3a9a3487 | 191 | |
3a9a3487 | 192 | // loop on events in file |
ef0182f7 | 193 | for(Int_t iEvent = evFirst; iEvent < tree->GetEntries(); iEvent++) { |
194 | if(iEvent > evLast) break; | |
e6e6531b | 195 | tree->GetEvent(iEvent); |
3a9a3487 | 196 | Int_t ev = (Int_t)event->GetEventNumber(); |
3a9a3487 | 197 | printf("--- Finding D0 -> Kpi in event %d\n",ev); |
ef0182f7 | 198 | // count the total number of events |
199 | nTotEv++; | |
3a9a3487 | 200 | |
ef0182f7 | 201 | trkEntries = (Int_t)event->GetNumberOfTracks(); |
3a9a3487 | 202 | printf(" Number of tracks: %d\n",trkEntries); |
ef0182f7 | 203 | if(trkEntries<2) continue; |
3a9a3487 | 204 | |
ef0182f7 | 205 | // retrieve primary vertex from file |
206 | if(!event->GetPrimaryVertex()) { | |
207 | printf(" No vertex\n"); | |
208 | continue; | |
209 | } | |
210 | event->GetPrimaryVertex()->GetXYZ(fV1); | |
3a9a3487 | 211 | |
212 | // call function which applies sigle-track selection and | |
213 | // separetes positives and negatives | |
214 | TObjArray trksP(trkEntries/2); | |
215 | Int_t *trkEntryP = new Int_t[trkEntries]; | |
216 | TObjArray trksN(trkEntries/2); | |
217 | Int_t *trkEntryN = new Int_t[trkEntries]; | |
218 | TTree *trkTree = new TTree(); | |
ef0182f7 | 219 | SelectTracks(event,trksP,trkEntryP,nTrksP, |
220 | trksN,trkEntryN,nTrksN); | |
221 | ||
222 | printf(" pos. tracks: %d neg .tracks: %d\n",nTrksP,nTrksN); | |
3a9a3487 | 223 | |
3a9a3487 | 224 | |
225 | nD0rec1ev = 0; | |
226 | ||
ef0182f7 | 227 | // LOOP ON POSITIVE TRACKS |
3a9a3487 | 228 | for(iTrkP=0; iTrkP<nTrksP; iTrkP++) { |
ef0182f7 | 229 | if(iTrkP%1==0) printf(" Processing positive track number %d of %d\n",iTrkP,nTrksP); |
3a9a3487 | 230 | |
231 | // get track from track array | |
c7bafca9 | 232 | postrack = (AliESDtrack*)trksP.UncheckedAt(iTrkP); |
3a9a3487 | 233 | trkNum[0] = trkEntryP[iTrkP]; |
234 | ||
ef0182f7 | 235 | // LOOP ON NEGATIVE TRACKS |
3a9a3487 | 236 | for(iTrkN=0; iTrkN<nTrksN; iTrkN++) { |
237 | ||
238 | // get track from tracks array | |
c7bafca9 | 239 | negtrack = (AliESDtrack*)trksN.UncheckedAt(iTrkN); |
3a9a3487 | 240 | trkNum[1] = trkEntryN[iTrkN]; |
241 | ||
3a9a3487 | 242 | // |
243 | // ----------- DCA MINIMIZATION ------------------ | |
244 | // | |
c7bafca9 | 245 | // find the DCA and propagate the tracks to the DCA |
246 | Double_t b=event->GetMagneticField(); | |
247 | AliESDtrack nt(*negtrack), pt(*postrack); | |
248 | dca = nt.PropagateToDCA(&pt,b); | |
3a9a3487 | 249 | |
c7bafca9 | 250 | // define the AliESDv0 object |
251 | AliESDv0 vertex2(nt,trkNum[0],pt,trkNum[1]); | |
3a9a3487 | 252 | |
253 | // get position of the secondary vertex | |
c7bafca9 | 254 | vertex2.GetXYZ(v2[0],v2[1],v2[2]); |
255 | vertex2.GetPPxPyPz(mom[0],mom[1],mom[2]); | |
256 | vertex2.GetNPxPyPz(mom[3],mom[4],mom[5]); | |
257 | // impact parameters of the tracks w.r.t. the primary vertex | |
c7bafca9 | 258 | d0[0] = 10000.*pt.GetD(fV1[0],fV1[1],b); |
259 | d0[1] = -10000.*nt.GetD(fV1[0],fV1[1],b); | |
3a9a3487 | 260 | goodVtx1 = kTRUE; |
ef0182f7 | 261 | |
3a9a3487 | 262 | // no vertexing if DeltaMass > fMassCut |
263 | if(fVertexOnTheFly) { | |
264 | goodVtx1 = kFALSE; | |
265 | if(SelectInvMass(mom)) { | |
ef0182f7 | 266 | // primary vertex from *other* tracks in the event |
3a9a3487 | 267 | skipped[0] = trkEntryP[iTrkP]; |
268 | skipped[1] = trkEntryN[iTrkN]; | |
269 | vertexer1->SetSkipTracks(2,skipped); | |
d681bb2d | 270 | AliESDVertex *vertex1onfly = |
ef0182f7 | 271 | (AliESDVertex*)vertexer1->FindPrimaryVertex(event); |
3a9a3487 | 272 | if(vertex1onfly->GetNContributors()>0) goodVtx1 = kTRUE; |
273 | vertex1onfly->GetXYZ(fV1); | |
274 | //vertex1onfly->PrintStatus(); | |
275 | delete vertex1onfly; | |
276 | } | |
ef0182f7 | 277 | } |
278 | ||
3a9a3487 | 279 | |
3a9a3487 | 280 | // create the object AliD0toKpi |
281 | AliD0toKpi theD0(ev,trkNum,fV1,v2,dca,mom,d0); | |
3a9a3487 | 282 | // select D0s |
283 | if(goodVtx1 && theD0.Select(fD0Cuts,okD0,okD0bar)) { | |
3a9a3487 | 284 | // get PID info from ESD |
285 | AliESDtrack *t0 = (AliESDtrack*)event->GetTrack(trkNum[0]); | |
286 | Double_t esdpid0[5]; | |
287 | t0->GetESDpid(esdpid0); | |
288 | if(t0->GetStatus()&AliESDtrack::kTOFpid) { | |
289 | tofmass[0] = CalculateTOFmass(t0->GetP(), | |
290 | t0->GetIntegratedLength(), | |
291 | t0->GetTOFsignal()); | |
292 | } else { | |
293 | tofmass[0] = -1000.; | |
294 | } | |
295 | AliESDtrack *t1 = (AliESDtrack*)event->GetTrack(trkNum[1]); | |
296 | Double_t esdpid1[5]; | |
297 | t1->GetESDpid(esdpid1); | |
298 | if(t1->GetStatus()&AliESDtrack::kTOFpid) { | |
299 | tofmass[1] = CalculateTOFmass(t1->GetP(), | |
300 | t1->GetIntegratedLength(), | |
301 | t1->GetTOFsignal()); | |
302 | } else { | |
303 | tofmass[1] = -1000.; | |
304 | } | |
305 | ||
306 | theD0.SetPIDresponse(esdpid0,esdpid1); | |
307 | theD0.SetTOFmasses(tofmass); | |
308 | ||
309 | // fill the tree | |
310 | ioD0toKpi=&theD0; | |
311 | treeD0->Fill(); | |
312 | ||
313 | nD0rec++; nD0rec1ev++; | |
314 | ioD0toKpi=0; | |
315 | } | |
316 | ||
317 | negtrack = 0; | |
318 | } // loop on negative tracks | |
319 | postrack = 0; | |
320 | } // loop on positive tracks | |
ef0182f7 | 321 | |
3a9a3487 | 322 | delete [] trkEntryP; |
323 | delete [] trkEntryN; | |
324 | delete trkTree; | |
3a9a3487 | 325 | |
3a9a3487 | 326 | printf(" Number of D0 candidates: %d\n",nD0rec1ev); |
327 | } // loop on events in file | |
328 | ||
329 | ||
330 | printf("\n+++\n+++ Total number of events: %d\n+++\n",nTotEv); | |
331 | printf("\n+++\n+++ Total number of D0 candidates: %d\n+++\n",nD0rec); | |
332 | ||
333 | delete vertexer1; | |
3a9a3487 | 334 | |
335 | esdFile->Close(); | |
336 | ||
337 | // create a copy of this class to be written to output file | |
338 | AliD0toKpiAnalysis *copy = (AliD0toKpiAnalysis*)this->Clone("D0toKpiAnalysis"); | |
339 | ||
340 | // add PDG codes to decay tracks in found candidates (in simulation mode) | |
341 | // and store tree in the output file | |
342 | if(!fSim) { | |
343 | TFile *outroot = new TFile(outName1.Data(),"recreate"); | |
344 | treeD0->Write(); | |
345 | copy->Write(); | |
346 | outroot->Close(); | |
347 | delete outroot; | |
348 | } else { | |
349 | printf(" Now adding information from simulation (PDG codes) ...\n"); | |
350 | TTree *treeD0sim = new TTree("TreeD0","Tree with D0 candidates"); | |
3a9a3487 | 351 | SimulationInfo(treeD0,treeD0sim); |
352 | delete treeD0; | |
353 | TFile *outroot = new TFile(outName1.Data(),"recreate"); | |
354 | treeD0sim->Write(); | |
355 | copy->Write(); | |
356 | outroot->Close(); | |
357 | delete outroot; | |
358 | } | |
359 | ||
360 | // write to a file the total number of events | |
361 | FILE *outdat = fopen(outName2.Data(),"w"); | |
362 | fprintf(outdat,"%d\n",nTotEv); | |
363 | fclose(outdat); | |
364 | ||
365 | return; | |
366 | } | |
367 | //----------------------------------------------------------------------------- | |
368 | void AliD0toKpiAnalysis::PrintStatus() const { | |
369 | // Print parameters being used | |
370 | ||
3a9a3487 | 371 | printf("Preselections:\n"); |
372 | printf(" fPtCut = %f GeV\n",fPtCut); | |
373 | printf(" fd0Cut = %f micron\n",fd0Cut); | |
374 | printf(" fMassCut = %f GeV\n",fMassCut); | |
375 | if(fVertexOnTheFly) printf("Primary vertex on the fly\n"); | |
376 | if(fSim) { | |
377 | printf("Simulation mode\n"); | |
378 | if(fOnlySignal) printf(" Only signal goes to file\n"); | |
379 | } | |
380 | printf("Cuts on candidates:\n"); | |
381 | printf(" |M-MD0| [GeV] < %f\n",fD0Cuts[0]); | |
382 | printf(" dca [micron] < %f\n",fD0Cuts[1]); | |
383 | printf(" cosThetaStar < %f\n",fD0Cuts[2]); | |
384 | printf(" pTK [GeV] > %f\n",fD0Cuts[3]); | |
385 | printf(" pTpi [GeV] > %f\n",fD0Cuts[4]); | |
386 | printf(" |d0K| [micron] < %f\n",fD0Cuts[5]); | |
387 | printf(" |d0pi| [micron] < %f\n",fD0Cuts[6]); | |
388 | printf(" d0d0 [micron^2] < %f\n",fD0Cuts[7]); | |
389 | printf(" cosThetaPoint > %f\n",fD0Cuts[8]); | |
390 | ||
391 | return; | |
392 | } | |
393 | //----------------------------------------------------------------------------- | |
394 | Bool_t AliD0toKpiAnalysis::SelectInvMass(const Double_t p[6]) const { | |
395 | // Apply preselection in the invariant mass of the pair | |
396 | ||
397 | Double_t mD0 = 1.8645; | |
398 | Double_t mPi = 0.13957; | |
399 | Double_t mKa = 0.49368; | |
400 | ||
401 | Double_t energy[2]; | |
402 | Double_t mom2[2],momTot2; | |
403 | ||
404 | mom2[0] = p[0]*p[0] + p[1]*p[1] + p[2]*p[2]; | |
405 | mom2[1] = p[3]*p[3] + p[4]*p[4] + p[5]*p[5]; | |
406 | ||
407 | momTot2 = (p[0]+p[3])*(p[0]+p[3])+ | |
408 | (p[1]+p[4])*(p[1]+p[4])+ | |
409 | (p[2]+p[5])*(p[2]+p[5]); | |
410 | ||
411 | // D0 -> K- pi+ | |
412 | energy[1] = TMath::Sqrt(mKa*mKa+mom2[1]); | |
413 | energy[0] = TMath::Sqrt(mPi*mPi+mom2[0]); | |
414 | ||
415 | Double_t minvD0 = TMath::Sqrt((energy[0]+energy[1])*(energy[0]+energy[1])-momTot2); | |
416 | ||
417 | // D0bar -> K+ pi- | |
418 | energy[0] = TMath::Sqrt(mKa*mKa+mom2[0]); | |
419 | energy[1] = TMath::Sqrt(mPi*mPi+mom2[1]); | |
420 | ||
421 | Double_t minvD0bar = TMath::Sqrt((energy[0]+energy[1])*(energy[0]+energy[1])-momTot2); | |
422 | ||
423 | if(TMath::Abs(minvD0-mD0) < fMassCut) return kTRUE; | |
424 | if(TMath::Abs(minvD0bar-mD0) < fMassCut) return kTRUE; | |
425 | return kFALSE; | |
426 | } | |
427 | //----------------------------------------------------------------------------- | |
ef0182f7 | 428 | void AliD0toKpiAnalysis::SelectTracks(AliESD *event, |
3a9a3487 | 429 | TObjArray &trksP,Int_t *trkEntryP,Int_t &nTrksP, |
430 | TObjArray &trksN,Int_t *trkEntryN,Int_t &nTrksN) const { | |
431 | // Create two TObjArrays with positive and negative tracks and | |
432 | // apply single-track preselection | |
433 | ||
434 | nTrksP=0,nTrksN=0; | |
435 | ||
ef0182f7 | 436 | Int_t entr = event->GetNumberOfTracks(); |
3a9a3487 | 437 | |
438 | // transfer ITS tracks from ESD to arrays and to a tree | |
439 | for(Int_t i=0; i<entr; i++) { | |
3a9a3487 | 440 | |
ef0182f7 | 441 | AliESDtrack *esdtrack = event->GetTrack(i); |
3a9a3487 | 442 | UInt_t status = esdtrack->GetStatus(); |
443 | ||
ef0182f7 | 444 | if(!(status&AliESDtrack::kITSin)) continue; |
3a9a3487 | 445 | |
3a9a3487 | 446 | // single track selection |
ef0182f7 | 447 | if(!SingleTrkCuts(*esdtrack,event->GetMagneticField())) continue; |
3a9a3487 | 448 | |
c7bafca9 | 449 | if(esdtrack->GetSign()<0) { // negative track |
450 | trksN.AddLast(esdtrack); | |
3a9a3487 | 451 | trkEntryN[nTrksN] = i; |
452 | nTrksN++; | |
453 | } else { // positive track | |
c7bafca9 | 454 | trksP.AddLast(esdtrack); |
3a9a3487 | 455 | trkEntryP[nTrksP] = i; |
456 | nTrksP++; | |
457 | } | |
458 | ||
459 | } // loop on ESD tracks | |
460 | ||
461 | return; | |
462 | } | |
463 | //----------------------------------------------------------------------------- | |
3a9a3487 | 464 | void AliD0toKpiAnalysis::SetD0Cuts(Double_t cut0,Double_t cut1, |
465 | Double_t cut2,Double_t cut3,Double_t cut4, | |
466 | Double_t cut5,Double_t cut6, | |
467 | Double_t cut7,Double_t cut8) { | |
468 | // Set the cuts for D0 selection | |
469 | fD0Cuts[0] = cut0; | |
470 | fD0Cuts[1] = cut1; | |
471 | fD0Cuts[2] = cut2; | |
472 | fD0Cuts[3] = cut3; | |
473 | fD0Cuts[4] = cut4; | |
474 | fD0Cuts[5] = cut5; | |
475 | fD0Cuts[6] = cut6; | |
476 | fD0Cuts[7] = cut7; | |
477 | fD0Cuts[8] = cut8; | |
478 | ||
479 | return; | |
480 | } | |
481 | //----------------------------------------------------------------------------- | |
482 | void AliD0toKpiAnalysis::SetD0Cuts(const Double_t cuts[9]) { | |
483 | // Set the cuts for D0 selection | |
484 | ||
485 | for(Int_t i=0; i<9; i++) fD0Cuts[i] = cuts[i]; | |
486 | ||
487 | return; | |
488 | } | |
489 | //----------------------------------------------------------------------------- | |
c7bafca9 | 490 | Bool_t |
491 | AliD0toKpiAnalysis::SingleTrkCuts(const AliESDtrack& trk, Double_t b) const { | |
3a9a3487 | 492 | // Check if track passes some kinematical cuts |
c7bafca9 | 493 | // Magnetic field "b" (kG) |
3a9a3487 | 494 | |
c7bafca9 | 495 | if(TMath::Abs(1./trk.GetParameter()[4]) < fPtCut) |
3a9a3487 | 496 | return kFALSE; |
c7bafca9 | 497 | if(TMath::Abs(10000.*trk.GetD(fV1[0],fV1[1],b)) < fd0Cut) |
3a9a3487 | 498 | return kFALSE; |
499 | ||
500 | return kTRUE; | |
501 | } | |
502 | //---------------------------------------------------------------------------- | |
ef0182f7 | 503 | void AliD0toKpiAnalysis::MakeTracksRefFile(AliRun *gAlice, |
504 | Int_t evFirst,Int_t evLast) const { | |
3a9a3487 | 505 | // Create a file with simulation info for the reconstructed tracks |
506 | ||
ef0182f7 | 507 | TFile *outFile = TFile::Open("D0TracksRefFile.root","recreate"); |
3a9a3487 | 508 | TFile *esdFile = TFile::Open("AliESDs.root"); |
3a9a3487 | 509 | |
ef0182f7 | 510 | AliMC *mc = gAlice->GetMCApp(); |
3a9a3487 | 511 | |
512 | Int_t label; | |
513 | TParticle *part; | |
514 | TParticle *mumpart; | |
515 | REFTRACK reftrk; | |
516 | ||
ef0182f7 | 517 | AliESD* event = new AliESD; |
518 | TTree* tree = (TTree*) esdFile->Get("esdTree"); | |
519 | tree->SetBranchAddress("ESD",&event); | |
3a9a3487 | 520 | // loop on events in file |
ef0182f7 | 521 | for(Int_t iEvent=evFirst; iEvent<tree->GetEntries(); iEvent++) { |
522 | if(iEvent>evLast) break; | |
523 | tree->GetEvent(iEvent); | |
3a9a3487 | 524 | Int_t ev = (Int_t)event->GetEventNumber(); |
525 | ||
ef0182f7 | 526 | gAlice->GetEvent(ev); |
3a9a3487 | 527 | |
528 | Int_t nentr=(Int_t)event->GetNumberOfTracks(); | |
529 | ||
530 | // Tree for true track parameters | |
531 | char ttname[100]; | |
532 | sprintf(ttname,"Tree_Ref_%d",ev); | |
533 | TTree *reftree = new TTree(ttname,"Tree with true track params"); | |
534 | reftree->Branch("rectracks",&reftrk,"lab/I:pdg:mumlab:mumpdg:Vx/F:Vy:Vz:Px:Py:Pz"); | |
535 | ||
536 | for(Int_t i=0; i<nentr; i++) { | |
537 | AliESDtrack *esdtrack = (AliESDtrack*)event->GetTrack(i); | |
538 | label = TMath::Abs(esdtrack->GetLabel()); | |
539 | ||
ef0182f7 | 540 | part = (TParticle*)mc->Particle(label); |
3a9a3487 | 541 | reftrk.lab = label; |
542 | reftrk.pdg = part->GetPdgCode(); | |
543 | reftrk.mumlab = part->GetFirstMother(); | |
544 | if(part->GetFirstMother()>=0) { | |
ef0182f7 | 545 | mumpart = (TParticle*)gAlice->GetMCApp()->Particle(part->GetFirstMother()); |
3a9a3487 | 546 | reftrk.mumpdg = mumpart->GetPdgCode(); |
ef0182f7 | 547 | reftrk.mumprongs = mumpart->GetNDaughters(); |
3a9a3487 | 548 | } else { |
549 | reftrk.mumpdg=-1; | |
ef0182f7 | 550 | reftrk.mumprongs=-1; |
3a9a3487 | 551 | } |
552 | reftrk.Vx = part->Vx(); | |
553 | reftrk.Vy = part->Vy(); | |
554 | reftrk.Vz = part->Vz(); | |
555 | reftrk.Px = part->Px(); | |
556 | reftrk.Py = part->Py(); | |
557 | reftrk.Pz = part->Pz(); | |
558 | ||
559 | reftree->Fill(); | |
560 | ||
561 | } // loop on tracks | |
562 | ||
563 | outFile->cd(); | |
564 | reftree->Write(); | |
565 | ||
566 | delete reftree; | |
3a9a3487 | 567 | } // loop on events |
568 | ||
569 | esdFile->Close(); | |
570 | outFile->Close(); | |
571 | ||
572 | return; | |
573 | } | |
574 | //----------------------------------------------------------------------------- | |
575 | void AliD0toKpiAnalysis::SimulationInfo(TTree *treeD0in,TTree *treeD0out) const { | |
576 | // add pdg codes to candidate decay tracks (for sim) | |
577 | ||
ef0182f7 | 578 | TString refFileName("D0TracksRefFile.root"); |
3a9a3487 | 579 | if(fSim && gSystem->AccessPathName(refFileName.Data(),kFileExists)) { |
580 | printf("AliD0toKpiAnalysis::SimulationInfo: no reference file found!\n"); | |
581 | return; | |
582 | } | |
583 | TFile *refFile = TFile::Open(refFileName.Data()); | |
584 | ||
585 | Char_t refTreeName[100]; | |
586 | Int_t event; | |
587 | Int_t pdg[2],mumpdg[2],mumlab[2]; | |
588 | REFTRACK reftrk; | |
589 | ||
590 | // read-in reference tree for event 0 (the only event for Pb-Pb) | |
591 | sprintf(refTreeName,"Tree_Ref_%d",0); | |
592 | TTree *refTree0 = (TTree*)refFile->Get(refTreeName); | |
593 | refTree0->SetBranchAddress("rectracks",&reftrk); | |
594 | ||
595 | AliD0toKpi *theD0 = 0; | |
596 | treeD0in->SetBranchAddress("D0toKpi",&theD0); | |
597 | treeD0out->Branch("D0toKpi","AliD0toKpi",&theD0,200000,0); | |
598 | ||
599 | Int_t entries = (Int_t)treeD0in->GetEntries(); | |
600 | ||
601 | for(Int_t i=0; i<entries; i++) { | |
602 | if(i%100==0) printf(" done %d candidates of %d\n",i,entries); | |
603 | ||
604 | treeD0in->GetEvent(i); | |
605 | event = theD0->EventNo(); | |
606 | ||
607 | if(event==0) { // always true for Pb-Pb (avoid to read-in tree every time) | |
608 | refTree0->GetEvent(theD0->GetTrkNum(0)); | |
609 | pdg[0] = reftrk.pdg; | |
610 | mumpdg[0] = reftrk.mumpdg; | |
611 | mumlab[0] = reftrk.mumlab; | |
612 | refTree0->GetEvent(theD0->GetTrkNum(1)); | |
613 | pdg[1] = reftrk.pdg; | |
614 | mumpdg[1] = reftrk.mumpdg; | |
615 | mumlab[1] = reftrk.mumlab; | |
616 | } else { | |
617 | sprintf(refTreeName,"Tree_Ref_%d",event); | |
618 | TTree *refTree = (TTree*)refFile->Get(refTreeName); | |
619 | refTree->SetBranchAddress("rectracks",&reftrk); | |
620 | refTree->GetEvent(theD0->GetTrkNum(0)); | |
621 | pdg[0] = reftrk.pdg; | |
622 | mumpdg[0] = reftrk.mumpdg; | |
623 | mumlab[0] = reftrk.mumlab; | |
624 | refTree->GetEvent(theD0->GetTrkNum(1)); | |
625 | pdg[1] = reftrk.pdg; | |
626 | mumpdg[1] = reftrk.mumpdg; | |
627 | mumlab[1] = reftrk.mumlab; | |
628 | delete refTree; | |
629 | } | |
630 | ||
631 | theD0->SetPdgCodes(pdg); | |
632 | theD0->SetMumPdgCodes(mumpdg); | |
633 | ||
ef0182f7 | 634 | if(TMath::Abs(mumpdg[0])==421 && |
635 | TMath::Abs(mumpdg[1])==421 && | |
636 | mumlab[0]==mumlab[1] && | |
637 | reftrk.mumprongs==2 && | |
638 | ((TMath::Abs(pdg[0])==211 && TMath::Abs(pdg[1])==321) || | |
639 | (TMath::Abs(pdg[0])==321 && TMath::Abs(pdg[1])==211)) | |
640 | ) theD0->SetSignal(); | |
3a9a3487 | 641 | |
642 | if(!fOnlySignal || theD0->IsSignal()) treeD0out->Fill(); | |
643 | ||
644 | } | |
645 | ||
646 | delete refTree0; | |
647 | ||
648 | refFile->Close(); | |
649 | ||
650 | return; | |
651 | } | |
652 | ||
653 | ||
654 | ||
655 | ||
656 | ||
657 |