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Splitted the PID cuts into three classes for ITS, TPC and TOF, and added the possibil...
[u/mrichter/AliRoot.git] / PWG2 / RESONANCES / extra / AliAnalysisTaskSigma1385.cxx
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35e49ca5 1/**************************************************************************
2 * Authors : Massimo Venaruzzo (massimo.venaruzzo@ts.infn.it) *
3 * Enrico Fragiacomo (enrico.fragiacomo@ts.infn.it) *
4 * Contributors are mentioned in the code where appropriate. *
5 * *
6 * Permission to use, copy, modify and distribute this software and its *
7 * documentation strictly for non-commercial purposes is hereby granted *
8 * without fee, provided that the above copyright notice appears in all *
9 * copies and that both the copyright notice and this permission notice *
10 * appear in the supporting documentation. The authors make no claims *
11 * about the suitability of this software for any purpose. It is *
12 * provided "as is" without express or implied warranty. *
13 **************************************************************************/
14
15//-----------------------------------------------------------------
16// AliAnalysisTaskSigma1385 class
17//-----------------------------------------------------------------
18
19class TTree;
20class TParticle;
21class TVector3;
22
23#include "AliAnalysisManager.h"
24#include <AliMCEventHandler.h>
25#include <AliMCEvent.h>
26#include <AliStack.h>
27
28class AliESDVertex;
29class AliESDv0;
30class AliAODv0;
31
32#include <iostream>
33
34#include "TList.h"
35#include "TH1.h"
36#include "TNtuple.h"
37#include "TGraph.h"
38#include "TCanvas.h"
39#include "TMath.h"
40#include "TChain.h"
41#include "AliLog.h"
42#include "AliESDEvent.h"
43#include "AliAODEvent.h"
44#include "AliCascadeVertexer.h"
45#include "AliESDcascade.h"
46#include "AliAODcascade.h"
47#include "AliAnalysisTaskSigma1385.h"
48#include "AliESDtrackCuts.h"
49
50ClassImp(AliAnalysisTaskSigma1385)
51
52//________________________________________________________________________
53 AliAnalysisTaskSigma1385::AliAnalysisTaskSigma1385()
54 : AliAnalysisTaskSE(), fAnalysisType("ESD"), fCollidingSystems(0), fDataType("REAL"),
55 fListHistCascade(0), fHistEventMultiplicity(0), fHistEventMultiplicityRAVS(0), fNtuple1(0), fNtuple2(0),fNtuple3(0), fNtuple4(0),
56
57 //-------------------------------- For PID
58
59 fIsMC(isMC),
60 fCheckITS(kTRUE),
61 fCheckTPC(kTRUE),
62 fCheckTOF(kTRUE),
63 fUseGlobal(kTRUE),
64 fUseITSSA(kTRUE),
65 fMaxITSband(3.0),
66 fTPCpLimit(0.35),
67 fMinTPCband(3.0),
68 fMaxTPCband(5.0),
69 fESDpid(0x0),
70 fTOFmaker(0x0),
71 fTOFcalib(0x0),
72 fTOFcalibrateESD(!isMC),
73 fTOFcorrectTExp(kTRUE),
74 fTOFuseT0(kTRUE),
75 fTOFtuneMC(isMC),
76 fTOFresolution(100.0),
77 fMinTOF(-2.5),
78 fMaxTOF( 3.5),
79 fLastRun(-1)
80
81 //--------------------------------
82
83{
84 // Dummy Constructor
85}
86
87//________________________________________________________________________
88AliAnalysisTaskSigma1385::AliAnalysisTaskSigma1385(const char *name)
89 : AliAnalysisTaskSE(name), fAnalysisType("ESD"), fCollidingSystems(0),fDataType("REAL"),
90 fListHistCascade(0), fHistEventMultiplicity(0), fHistEventMultiplicityRAVS(0), fNtuple1(0), fNtuple2(0), fNtuple3(0), fNtuple4(0),
91
92 //-------------------------------- For PID
93
94 fIsMC(isMC),
95 fCheckITS(kTRUE),
96 fCheckTPC(kTRUE),
97 fCheckTOF(kTRUE),
98 fUseGlobal(kTRUE),
99 fUseITSSA(kTRUE),
100 fMaxITSband(3.0),
101 fTPCpLimit(0.35),
102 fMinTPCband(3.0),
103 fMaxTPCband(5.0),
104 fESDpid(0x0),
105 fTOFmaker(0x0),
106 fTOFcalib(0x0),
107 fTOFcalibrateESD(!isMC),
108 fTOFcorrectTExp(kTRUE),
109 fTOFuseT0(kTRUE),
110 fTOFtuneMC(isMC),
111 fTOFresolution(100.0),
112 fMinTOF(-2.5),
113 fMaxTOF( 3.5),
114 fLastRun(-1)
115
116 //--------------------------------
117{
118
119 // Output slot #0 writes into a TList container (Cascade)
120 DefineOutput(1, TList::Class());
121}
122
123//________________________________________________________________________
124void AliAnalysisTaskSigma1385::UserCreateOutputObjects()
125{
126 fListHistCascade = new TList();
127
128 if(! fHistEventMultiplicity ){
129 fHistEventMultiplicity = new TH1F( "fHistEventMultiplicity" , "Nb of Events" , 4, -1.0, 3.0 );
130 fListHistCascade->Add(fHistEventMultiplicity);
131 }
132
133 if(! fHistEventMultiplicityRAVS ){
134 fHistEventMultiplicityRAVS = new TH1F( "fHistEventMultiplicityRAVS" , "Nb of Events Rejected After Vertex selection" , 4, -1.0, 3.0 );
135 fListHistCascade->Add(fHistEventMultiplicityRAVS);
136 }
137
138 if(! fNtuple1 ) {
139 fNtuple1 = new TNtuple("fNtuple1","Ntuple1","TrkNmb");
140 fNtuple1->SetDirectory(0);
141 fListHistCascade->Add(fNtuple1);
142 }
143
144 if(! fNtuple2 ) {
145 fNtuple2 = new TNtuple("fNtuple2","Ntuple2","s:dcal:lCosPoinAn:lDaugDCA:lambdap:lambdapt:lambdamass");
146 fNtuple2->SetDirectory(0);
147 fListHistCascade->Add(fNtuple2);
148 }
149
150 if(! fNtuple3 ) {
151 fNtuple3 = new TNtuple("fNtuple3","Ntuple3","c:dcapi:ppi:ptpi:bachphi:bachtheta:okPiTPC:okPiTOF");
152 fNtuple3->SetDirectory(0);
153 fListHistCascade->Add(fNtuple3);
154 }
155
156 if(! fNtuple4 ) {
157 fNtuple4 = new TNtuple("fNtuple4","Ntuple4","dca:mc:phi:theta:eta:y:pt:p:opang:invmass");
158 fListHistCascade->Add(fNtuple4);
159 }
160
161
162}// end UserCreateOutputObjects
163
164
165//________________________________________________________________________
166void AliAnalysisTaskSigma1385::UserExec(Option_t *)
167{
168
169 // Main loop
170 // Called for each event
171
172
173 Info("AliAnalysisTaskSigma1385","Starting UserExec");
174
175 AliMCEventHandler* eventHandler;
176 AliMCEvent* mcEvent;
177
178 if(fDataType == "SIM") {
179
180 eventHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
181 if (!eventHandler) {
182 Printf("ERROR: Could not retrieve MC event handler");
183 return;
184 }
185
186 mcEvent = eventHandler->MCEvent();
187 if (!mcEvent) {
188 Printf("ERROR: Could not retrieve MC event");
189 return;
190 }
191
192 }
193
194 AliStack* stack;
195 if(fDataType == "SIM") {stack = mcEvent->Stack(); fIsMC=1; isMC=1;}
196
197 AliESDEvent *lESDevent = 0x0;
198 AliAODEvent *lAODevent = 0x0;
199
200
201 // Connect to the InputEvent
202 Int_t ncascades = -1;
203 if(fAnalysisType == "ESD"){
204 lESDevent = dynamic_cast<AliESDEvent*>( InputEvent() );
205 if (!lESDevent) {
206 Printf("ERROR: lESDevent not available \n");
207 return;
208 }
209 ncascades = lESDevent->GetNumberOfCascades();
210 }
211
212 if(fAnalysisType == "AOD"){
213 lAODevent = dynamic_cast<AliAODEvent*>( InputEvent() );
214 if (!lAODevent) {
215 Printf("ERROR: lAODevent not available \n");
216 return;
217 }
218 ncascades = lAODevent->GetNumberOfCascades();
219 }
220
221
222 //------------------------------for PID
223
224 SetCheckITS(kTRUE);
225 SetCheckTPC(kTRUE);
226 SetCheckTOF(kTRUE);
227
228 // ----> set TPC range for PID and calibration
229 SetTPCrange(5.0, 3.0);
230 SetTPCpLimit(0.35);
231
232 // ----> set ITS range for PID
233 SetITSband(4.0);
234
235 // ----> set TPC calibration
236 if (fDataType=="SIM") SetTPCpar(2.15898 / 50.0, 1.75295E1, 3.40030E-9, 1.96178, 3.91720);
237 else SetTPCpar(1.41543 / 50.0, 2.63394E1, 5.0411E-11, 2.12543, 4.88663);
238
239 // ----> set the TOF calibration depending on type of input (sim/data)
240 SetTOFcorrectTExp(kTRUE);
241 SetTOFuseT0(kTRUE);
242 SetTOFresolution(100.0);
243 if (fDataType=="SIM")
244 {
245 SetTOFcalibrateESD(kFALSE);
246 SetTOFtuneMC(kTRUE);
247 }
248 else
249 {
250
251 SetTOFcalibrateESD(kTRUE);
252 SetTOFtuneMC(kFALSE);
253 }
254
255
256 if (!fESDpid)
257 {
258 fESDpid = new AliESDpid;
259 fESDpid->GetTPCResponse().SetBetheBlochParameters(fTPCpar[0],fTPCpar[1],fTPCpar[2],fTPCpar[3],fTPCpar[4]);
260 }
261
262 // initialize DB to current run
263 Int_t run = lESDevent->GetRunNumber();
264 if (run != fLastRun)
265 {
266 cout << "Run = " << run << " -- LAST = " << fLastRun << endl;
267 fLastRun = run;
268
269 // setup TOF maker & calibration
270 if (!fTOFcalib) fTOFcalib = new AliTOFcalib;
271 fTOFcalib->SetCorrectTExp(fTOFcorrectTExp);
272 if (!fTOFmaker) fTOFmaker = new AliTOFT0maker(fESDpid, fTOFcalib);
273 fTOFmaker->SetTimeResolution(fTOFresolution);
274
275 AliCDBManager *cdb = AliCDBManager::Instance();
276 cdb->ClearCache(); // suggestion by Annalisa
277 cdb->Clear(); // suggestion by Annalisa
278 cdb->SetDefaultStorage("raw://");
279 cdb->SetRun(run);
280 fTOFcalib->SetCorrectTExp(fTOFcorrectTExp);
281 fTOFcalib->Init();
282 }
283
284 // if required, calibrate the TOF t0 maker with current event
285 if (fTOFcalibrateESD) fTOFcalib->CalibrateESD(lESDevent);
286 if (fTOFtuneMC) fTOFmaker->TuneForMC(lESDevent);
287 if (fTOFuseT0)
288 {
289 fTOFmaker->ComputeT0TOF(lESDevent);
290 fTOFmaker->ApplyT0TOF(lESDevent);
291 fESDpid->MakePID(lESDevent, kFALSE, 0.);
292 }
293
294
295 //--------------------------------------------------------
296
297
298 fHistEventMultiplicity->Fill(1);
299
300 //Some Quantities to characterize the event
301
302 Double_t b = lESDevent->GetMagneticField();
303 Int_t TrackNumber = lESDevent->GetNumberOfTracks();
304
305
306 //---------------------------
307 // new part from AliCascadeVertexer (use vertexer for reconstructing Sigma(1385)
308 //
309 //const AliESDVertex *vtxT3D=lESDevent->GetPrimaryVertex();
310 const AliESDVertex *vtxT3D=lESDevent->GetPrimaryVertexTracks();
311 if(vtxT3D->GetNContributors()<1) {
312 // SPD vertex
313 vtxT3D= lESDevent->GetPrimaryVertexSPD();
314 if(vtxT3D->GetNContributors()<1){
315
316
317 fHistEventMultiplicityRAVS->Fill(1);
318 return;
319 }
320
321
322 }
323
324 Double_t xPrimaryVertex=vtxT3D->GetXv();
325 Double_t yPrimaryVertex=vtxT3D->GetYv();
326 Double_t zPrimaryVertex=vtxT3D->GetZv();
327
328 if ( zPrimaryVertex>10 || zPrimaryVertex<-10) return;
329
330 //-------------------------------------------------------
331 // New Part about tracks global selection criteria
332 //-------------------------------------------------------
333
334 AliESDtrackCuts* esdTrackCuts = new AliESDtrackCuts("AliESDtrackCuts");
335
336 esdTrackCuts->SetAcceptKinkDaughters(0); // 0 = kFalse
337 esdTrackCuts->SetClusterRequirementITS(AliESDtrackCuts::kSPD, AliESDtrackCuts::kAny);
338 esdTrackCuts->SetMaxChi2PerClusterTPC(4);
339 esdTrackCuts->SetMinNClustersTPC(70);
340
341
342 //-------------------------------------------------------
343 // loops over V0s
344 //stores relevant V0s in an array
345 Int_t nV0=(Int_t)lESDevent->GetNumberOfV0s();
346
347 TObjArray vtcs(nV0);
348 for (Int_t i=0; i<nV0; i++) {
349 AliESDv0 *v=lESDevent->GetV0(i);
350 if (v->GetOnFlyStatus()) continue; // if kTRUE, then this V0 is recontructed
351
352 vtcs.AddLast(v);
353 }
354 nV0=vtcs.GetEntriesFast();
355
356 //-------------------------------------------------------
357 // loops over bachelor tracks
358 // stores relevant tracks in another array
359
360 Int_t nentr=(Int_t)lESDevent->GetNumberOfTracks();
361 TArrayI trk(nentr); Int_t ntr=0;
362
363 for (Int_t i=0; i<nentr; i++) {
364 AliESDtrack *esdtr=lESDevent->GetTrack(i);
365
366 if ( !(esdtr->GetStatus() & AliESDtrack::kITSrefit) ) continue;
367 if ( !(esdtr->GetStatus() & AliESDtrack::kTPCrefit) ) continue;
368
369
370 if (! (esdTrackCuts->AcceptTrack(esdtr)) ) continue;
371
372 trk[ntr++]=i;
373 }
374
375
376
377 //-----------------------------------------------------
378 // nested loops over V0s and bachelors
379 Float_t massLambda = 1.11568;
380 Int_t ncasc=0;
381 AliCascadeVertexer *cascvert = new AliCascadeVertexer();
382 for (Int_t i=0; i<nV0; i++) { //loop on V0s
383
384 // Lambda
385 AliESDv0 *v=(AliESDv0*)vtcs.UncheckedAt(i);
386 Int_t strness=0;
387 Double_t lambdaMass = 0;
388 Float_t lambdaP = 0;
389 Float_t lambdaPt = 0;
390 Float_t LambdaDCA = 0; // DCA between Lambda and Primary Vertex
391 Double_t v0cospointangle = 0;
392 Float_t v0daughtersDCA = 0;
393
394
395 // Lambda quality cuts
396 UInt_t lIdxPosXi = (UInt_t) TMath::Abs( v->GetPindex() );
397 UInt_t lIdxNegXi = (UInt_t) TMath::Abs( v->GetNindex() );
398
399 AliESDtrack *pTrackXi = lESDevent->GetTrack( lIdxPosXi );
400 AliESDtrack *nTrackXi = lESDevent->GetTrack( lIdxNegXi );
401
402 // Filter like-sign V0
403 if ( pTrackXi->GetSign() == nTrackXi->GetSign()) continue;
404
405 // WARNING: the following selections cannot be done for AOD yet...
406
407
408 v->ChangeMassHypothesis(kLambda0); // the v0 must be Lambda
409
410
411 if ( (TMath::Abs(v->GetEffMass()-massLambda))<0.1) {
412
413 if( !(pTrackXi->GetStatus() & AliESDtrack::kTPCrefit)) continue;
414 if( !(nTrackXi->GetStatus() & AliESDtrack::kTPCrefit)) continue;
415
416
417 if( (pTrackXi->GetTPCNcls() ) < 70) continue;
418 if( (nTrackXi->GetTPCNcls() ) < 70) continue;
419
420 strness=1; lambdaMass = v->GetEffMass(); lambdaP = v->P(); lambdaPt = v->Pt(); LambdaDCA = v->GetD(xPrimaryVertex,yPrimaryVertex,zPrimaryVertex); v0cospointangle = v->GetV0CosineOfPointingAngle(); v0daughtersDCA = v->GetDcaV0Daughters();
421
422
423
424 }
425
426
427 v->ChangeMassHypothesis(kLambda0Bar); // the v0 must be Anti Lambda
428
429
430
431 if ( (TMath::Abs(v->GetEffMass()-massLambda))<0.1) {
432
433 if( !(pTrackXi->GetStatus() & AliESDtrack::kTPCrefit)) continue;
434 if( !(nTrackXi->GetStatus() & AliESDtrack::kTPCrefit)) continue;
435
436
437 if( (pTrackXi->GetTPCNcls() ) < 70) continue;
438 if( (nTrackXi->GetTPCNcls() ) < 70) continue;
439
440 Int_t temp=strness+1; strness=-1*temp; lambdaMass = v->GetEffMass(); lambdaP = v->P(); lambdaPt = v->Pt(); LambdaDCA = v->GetD(xPrimaryVertex,yPrimaryVertex,zPrimaryVertex); v0cospointangle = v->GetV0CosineOfPointingAngle(); v0daughtersDCA = v->GetDcaV0Daughters();
441
442
443 }
444
445 if(strness==0) continue;
446
447
448 for (Int_t j=0; j<ntr; j++) {//loop on tracks
449
450 // Pion bachelor
451 Int_t bidx=trk[j];
452 Int_t bachTPCcls=0;
453
454
455 if ((bidx==v->GetIndex(0))||(bidx==v->GetIndex(1))) continue; // bach and V0's daughter's must be different!
456
457 AliESDtrack *btrk=lESDevent->GetTrack(bidx);
458
459 if ( !(btrk->GetStatus() & AliESDtrack::kTPCrefit) ) continue;
460
461 if ( (bachTPCcls=btrk->GetTPCNcls()) <70) continue;
462
463 Bool_t *IsOkTrack = IsSelected(btrk); //for Alberto's PID
464
465 Bool_t *okTrack = new Bool_t[5];
466
467 for(Int_t k=0; k<5; k++) okTrack[k]=IsOkTrack[k];
468
469
470 Int_t BachCharge = btrk->Charge();
471 Float_t PionDCA = TMath::Abs(btrk->GetD(xPrimaryVertex,yPrimaryVertex,b)); // DCA between Bachelor and Primary Vertex
472
473 Double_t bachphi = btrk->Phi();
474 Double_t bachtheta = btrk->Theta();
475 Double_t bachmass = 0.13957;
476 Double_t bachp = btrk->GetP();
477 Double_t bachpt = btrk->Pt();
478
479
480 // Distance between Lambda and Pion bachelor
481 AliESDv0 v0(*v), *pv0=&v0;
482 AliExternalTrackParam bt(*btrk), *pbt=&bt;
483 Double_t dca=cascvert->PropagateToDCA(pv0,pbt,b); // distance bwn V0 and bach (in cm)
484 if (dca > 10.0) continue; // Note: was 0.1! Enlarged->further filter in second pass analysis
485
486
487 AliESDcascade cascade(*pv0,*pbt,bidx);//constucts a sigma1385 candidate
488 AliESDcascade *xi = &cascade;
489
490
491 UInt_t lBachIdx = (UInt_t) TMath::Abs( xi->GetBindex() );
492 AliESDtrack *bachTrackXi = lESDevent->GetTrack( lBachIdx );
493
494
495
496 Bool_t MCtrue=0;
497 if(fDataType == "SIM") {
498
499 Int_t pLabel = TMath::Abs(pTrackXi->GetLabel());
500 Int_t nLabel = TMath::Abs(nTrackXi->GetLabel());
501 Int_t bachLabel = TMath::Abs(bachTrackXi->GetLabel());
502
503 Int_t motherpLabel = stack->Particle(pLabel)->GetFirstMother();
504 Int_t mothernLabel = stack->Particle(nLabel)->GetFirstMother();
505 Int_t motherbachLabel = stack->Particle(bachLabel)->GetFirstMother();
506
507
508 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
509 //cout<< "plabel " << pLabel << " nlabel " << nLabel << " mother p " << motherpLabel << " mother n " << mothernLabel << " bachlabel " << bachLabel << " mother bach " << motherbachLabel << endl;
510 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
511
512 if (motherpLabel>-1 && mothernLabel>-1) {
513 TParticle *plambda = stack->Particle(motherpLabel);
514 Int_t grandmother = plambda->GetFirstMother();
515
516 motherpLabel = TMath::Abs(motherpLabel);
517 mothernLabel = TMath::Abs(mothernLabel);
518 //motherbachLabel = TMath::Abs(motherbachLabel);
519
520 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
521 //cout<< "plabel " << pLabel << " nlabel " << nLabel << " mother p " << motherpLabel << " mother n " << mothernLabel << " mother lambda " << grandmother << " bachlabel " << bachLabel << " mother bach " << motherbachLabel << endl;
522 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
523
524 if (motherbachLabel >-1){
525
526
527 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
528 //cout<< "mother lambda " << grandmother << " mother bach " << motherbachLabel << " PDG Code "<< stack->Particle(grandmother)->GetPdgCode() << endl;
529 //cout<< "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
530
531 if( (motherpLabel==mothernLabel) && (grandmother==motherbachLabel) &&
532 ( (TMath::Abs(stack->Particle(grandmother)->GetPdgCode())==3114) ||
533 (TMath::Abs(stack->Particle(grandmother)->GetPdgCode())==3224) ) ) MCtrue=1;
534
535 }
536
537 }
538
539 }
540
541 Double_t lBachMomX = 0., lBachMomY = 0., lBachMomZ = 0.;
542 Double_t lPMom[3]= {0.,0.,0.,};
543 Double_t lNMom[3]= {0.,0.,0.,};
544 Float_t lLambdaMomX = 0., lLambdaMomY = 0., lLambdaMomZ = 0.;
545 xi->GetBPxPyPz( lBachMomX, lBachMomY, lBachMomZ );
546 xi->GetPPxPyPz( lPMom[0], lPMom[1], lPMom[2] );
547 xi->GetNPxPyPz( lNMom[0], lNMom[1], lNMom[2] );
548 lLambdaMomX=lPMom[0]+lNMom[0];
549 lLambdaMomY=lPMom[1]+lNMom[1];
550 lLambdaMomZ=lPMom[2]+lNMom[2];
551
552 Float_t lRapXi = xi->RapXi();
553 Float_t lEta = xi->Eta();
554 Float_t lTheta = xi->Theta();
555 Float_t lPhi = xi->Phi();
556 Float_t lPt = xi->Pt();
557 Float_t lP = xi->P();
558
559 // Support variables for invariant mass calculation
560 TLorentzVector Lambda, Pion, Sigma;
561 Double_t Elambda = TMath::Sqrt( lLambdaMomX*lLambdaMomX + lLambdaMomY*lLambdaMomY + lLambdaMomZ*lLambdaMomZ + lambdaMass*lambdaMass );
562 Double_t Epion = TMath::Sqrt( lBachMomX*lBachMomX + lBachMomY*lBachMomY + lBachMomZ*lBachMomZ + bachmass*bachmass) ;
563
564 Lambda.SetPxPyPzE(lLambdaMomX, lLambdaMomY, lLambdaMomZ, Elambda);
565 Pion.SetPxPyPzE(lBachMomX, lBachMomY, lBachMomZ, Epion);
566
567 Sigma = Lambda + Pion;
568
569 Double_t openingangle, invmass=0;
570
571 openingangle = TMath::ACos( ( lBachMomX*lLambdaMomX + lBachMomY*lLambdaMomY + lBachMomZ*lLambdaMomZ ) / ( (TMath::Sqrt( lBachMomX*lBachMomX + lBachMomY*lBachMomY + lBachMomZ*lBachMomZ )) *(TMath::Sqrt( lLambdaMomX*lLambdaMomX + lLambdaMomY*lLambdaMomY +
572 lLambdaMomZ*lLambdaMomZ ) ) ) );
573
574 invmass = Sigma.M();
575
576
577 fNtuple1->Fill( TrackNumber );
578 fNtuple2->Fill( (1.*strness), LambdaDCA, v0cospointangle, v0daughtersDCA , lambdaP, lambdaPt, lambdaMass );
579 fNtuple3->Fill( (1.*BachCharge), PionDCA, bachp, bachpt, bachphi, bachtheta, okTrack[1], okTrack[2]);
580 fNtuple4->Fill( dca, (1.*MCtrue), lPhi, lTheta, lEta, lRapXi, lPt, lP, openingangle, invmass);
581
582 ncasc++;
583
584 delete IsOkTrack;
585 delete okTrack;
586
587
588 } // end loop tracks
589 } // end loop V0s
590
591 Info("AliAnalysisTaskSigma1385","Number of reconstructed Sigma(1385): %d",ncasc);
592
593
594 // Post output data.
595 PostData(1, fListHistCascade);
596
597}
598
599//________________________________________________________________________
600
601Bool_t *AliAnalysisTaskSigma1385::IsSelected(AliESDtrack *track)
602{
603//
604//
605 Bool_t *okTrack = new Bool_t[5];
606
607 for (Int_t i=0; i<5; i++) okTrack[i]=kFALSE;
608
609
610 AliITSPIDResponse itsrsp(fIsMC);
611
612
613 ULong_t status;
614 Int_t k, nITS;
615 Double_t times[10], tpcNSigma, tpcMaxNSigma, itsSignal, itsNSigma, mom, tofTime, tofSigma, tofRef, tofRel;
616 Bool_t okTOF= kFALSE;
617 Bool_t okTPC= kFALSE;
618 Bool_t okITS= kFALSE;
619 Bool_t isTPC= kFALSE;
620 Bool_t isITSSA= kFALSE;
621 Bool_t isTOF= kFALSE;
622 UChar_t itsCluMap;
623
624 // get commonly used variables
625 status = (ULong_t)track->GetStatus();
626 mom = track->P();
627 isTPC = ((status & AliESDtrack::kTPCin) != 0);
628 isITSSA = ((status & AliESDtrack::kTPCin) == 0 && (status & AliESDtrack::kITSrefit) != 0 && (status & AliESDtrack::kITSpureSA) == 0 && (status & AliESDtrack::kITSpid) != 0);
629 isTOF = (((status & AliESDtrack::kTOFout) != 0) && ((status & AliESDtrack::kTIME) != 0) /* && mom > TMath::Max(b1, b2)*/);
630
631
632 // check if the track type matches what is required
633 if (!isTPC && !isITSSA)
634 {
635 AliDebug(AliLog::kDebug + 2, "Track is not either a TPC track or a ITS standalone. Rejected");
636 return okTrack;
637
638 }
639 else if (isTPC && !fUseGlobal)
640 {
641 AliDebug(AliLog::kDebug + 2, "Global tracks not used. Rejected");
642 return okTrack;
643
644 }
645 else if (isITSSA && !fUseITSSA)
646 {
647 AliDebug(AliLog::kDebug + 2, "ITS standalone not used. Rejected");
648 return okTrack;
649
650 }
651
652 // does a preliminary check on TOF values, if necessary
653 // then, if the reference time or TOF signal are meaningless
654 // even if the 'isTOF' flag is true, switch it to false
655 if (isTOF)
656 {
657 track->GetIntegratedTimes(times);
658 tofTime = (Double_t)track->GetTOFsignal();
659 tofSigma = fTOFmaker->GetExpectedSigma(mom, times[AliPID::kPion], AliPID::ParticleMass(AliPID::kPion));
660 tofRef = times[AliPID::kPion];
661 if (tofRef <= 0.0 && tofSigma <= 0.0) isTOF = kFALSE;
662 }
663
664
665
666 // check TPC dE/dx
667 if (isTPC) // this branch is entered by all global tracks
668 {
669 // check TPC dE/dx:
670 if (fCheckTPC)
671 {
672 tpcNSigma = TMath::Abs(fESDpid->NumberOfSigmasTPC(track, AliPID::kPion));
673 if (track->GetInnerParam()->P() > fTPCpLimit) tpcMaxNSigma = fMinTPCband; else tpcMaxNSigma = fMaxTPCband;
674 okTPC = (tpcNSigma <= tpcMaxNSigma);
675 AliDebug(AliLog::kDebug + 2, Form("TPC nsigma = %f -- max = %f -- cut %s", tpcNSigma, tpcMaxNSigma, (okTPC ? "passed" : "failed")));
676 }
677 else
678 {
679 // if TPC is not checked, it is as if all tracks do pass the cut
680 okTPC = kTRUE;
681 AliDebug(AliLog::kDebug + 2, "TPC not checked, track accepted");
682 }
683
684 // check TOF (only if flags are OK)
685 if (fCheckTOF)
686 {
687 if (isTOF)
688 {
689 // TOF can be checked only when track is matched there
690 track->GetIntegratedTimes(times);
691 tofTime = (Double_t)track->GetTOFsignal();
692 tofSigma = fTOFmaker->GetExpectedSigma(mom, times[AliPID::kPion], AliPID::ParticleMass(AliPID::kPion));
693 tofRef = times[AliPID::kPion];
694
695 tofRel = (tofTime - tofRef) / tofSigma;
696 okTOF = ((tofRel >= fMinTOF) && (tofRel <= fMaxTOF));
697 AliDebug(AliLog::kDebug + 2, Form("TOF nsigma = %f -- range = %f %f -- cut %s", tofRel, fMinTOF, fMaxTOF, (okTOF ? "passed" : "failed")));
698 }
699 else
700 {
701 // if TOF is not matched, the answer depends on TPC:
702 // - if TPC is required, track is checked only there and TOF simply ignored
703 // - if TPC is not required, track is rejected when TOF does not match it, if TOF check is required
704 if (fCheckTPC) okTOF = kTRUE; else okTOF = kFALSE;
705 }
706 }
707 else
708 {
709 okTOF = kTRUE;
710 }
711
712 }
713 else if (isITSSA) // this branch is entered by all ITS standalone tracks
714 {
715 // check dE/dx only if this is required, otherwise ITS standalone are just added but not checked for PID
716 if (fCheckITS)
717 {
718 itsSignal = track->GetITSsignal();
719 itsCluMap = track->GetITSClusterMap();
720 nITS = 0;
721 for(k = 2; k < 6; k++) if(itsCluMap & (1 << k)) ++nITS;
722 if (nITS < 3) return kFALSE;
723 itsNSigma = itsrsp.GetNumberOfSigmas(mom, itsSignal, AliPID::kPion, nITS, kTRUE);
724 okITS = ((TMath::Abs(itsNSigma)) <= fMaxITSband);
725 AliDebug(AliLog::kDebug + 2, Form("ITS nsigma = %f -- max = %f -- cut %s", itsNSigma, fMaxITSband, (okITS ? "passed" : "failed")));
726 }
727 else
728 {
729 okITS = kTRUE;
730 }
731 }
732 else
733 {
734 // if we are here, the track is surely bad
735 okITS=kFALSE;
736 okTPC=kFALSE;
737 okTOF=kFALSE;
738 }
739
740
741 okTrack[0]=okITS;
742 okTrack[1]=okTPC;
743 okTrack[2]=okTOF;
744 okTrack[3]=isTPC;
745 okTrack[4]=isITSSA;
746
747 //cout<<"##########################################"<<endl;
748 //cout<<"isITSSA "<<isITSSA<< " isTPC "<<isTPC<<endl;
749 //cout<<"##########################################"<<endl;
750
751
752 return okTrack;
753}
754
755
756
757
758
759
760
761
762
763
764
765//________________________________________________________________________
766void AliAnalysisTaskSigma1385::Terminate(Option_t *)
767{
768 // Draw result to the screen
769 // Called once at the end of the query
770}
771
772
773