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0aaa8b91 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 **************************************************************************/
f2dec884 15//
16// static dNdPt helper functions
17//
18// basic functionality to select events and tracks
19// for dNdPt analysis
20//
21// Origin: Jan Fiete Grosse-Oetringhaus
22// Modified and Extended: Jacek Otwinowski 19/11/2009
23//
24//
0aaa8b91 25
26#include <TROOT.h>
f2dec884 27#include <TCanvas.h>
28#include <TF1.h>
0aaa8b91 29#include <TH1.h>
30#include <TH2.h>
31#include <TH3.h>
0aaa8b91 32
33#include <AliHeader.h>
34#include <AliStack.h>
35#include <AliLog.h>
0aaa8b91 36#include <AliESD.h>
37#include <AliESDEvent.h>
38#include <AliMCEvent.h>
39#include <AliESDVertex.h>
40#include <AliVertexerTracks.h>
0aaa8b91 41#include <AliMathBase.h>
42#include <AliESDtrackCuts.h>
774986ef 43#include <AliTracker.h>
0aaa8b91 44#include "dNdPt/AlidNdPtEventCuts.h"
45#include "dNdPt/AlidNdPtAcceptanceCuts.h"
46#include "dNdPt/AlidNdPtHelper.h"
47
48//____________________________________________________________________
49ClassImp(AlidNdPtHelper)
50
0aaa8b91 51//____________________________________________________________________
f2dec884 52const AliESDVertex* AlidNdPtHelper::GetVertex(AliESDEvent* const aEsd, AlidNdPtEventCuts *const evtCuts, AlidNdPtAcceptanceCuts *const accCuts, AliESDtrackCuts *const trackCuts, AnalysisMode analysisMode, Bool_t debug, Bool_t bRedoTPC, Bool_t bUseMeanVertex)
0aaa8b91 53{
54 // Get the vertex from the ESD and returns it if the vertex is valid
55 //
56 // Second argument decides which vertex is used (this selects
57 // also the quality criteria that are applied)
58
59 if(!aEsd)
60 {
61 ::Error("AlidNdPtHelper::GetVertex()","esd event is NULL");
62 return NULL;
63 }
64
65 if(!evtCuts || !accCuts || !trackCuts)
66 {
67 ::Error("AlidNdPtHelper::GetVertex()","cuts not available");
68 return NULL;
69 }
70
71 const AliESDVertex* vertex = 0;
72 AliESDVertex *initVertex = 0;
774986ef 73 if (analysisMode == kSPD || analysisMode == kTPCITS ||
74 analysisMode == kTPCSPDvtx || analysisMode == kTPCSPDvtxUpdate || analysisMode == kTPCITSHybrid)
0aaa8b91 75 {
76 vertex = aEsd->GetPrimaryVertexSPD();
77 if (debug)
78 Printf("AlidNdPtHelper::GetVertex: Returning SPD vertex");
79 }
695facdf 80 else if (analysisMode == kTPCTrackSPDvtx || analysisMode == kTPCTrackSPDvtxUpdate ||
81 analysisMode == kTPCITSHybridTrackSPDvtx || analysisMode == kTPCITSHybridTrackSPDvtxDCArPt ||
82 analysisMode == kITSStandAloneTrackSPDvtx || analysisMode == kITSStandAloneTPCTrackSPDvtx)
791aaf54 83 {
84 vertex = aEsd->GetPrimaryVertexTracks();
85 if(!vertex) return NULL;
86 if(vertex->GetNContributors()<1) {
87 // SPD vertex
88 vertex = aEsd->GetPrimaryVertexSPD();
89 }
90 }
847e74b2 91 else if (analysisMode == kTPC)
0aaa8b91 92 {
93 if(bRedoTPC) {
94
95 Double_t kBz = aEsd->GetMagneticField();
96 AliVertexerTracks vertexer(kBz);
97
98 if(bUseMeanVertex) {
99 Double_t pos[3]={evtCuts->GetMeanXv(),evtCuts->GetMeanYv(),evtCuts->GetMeanZv()};
100 Double_t err[3]={evtCuts->GetSigmaMeanXv(),evtCuts->GetSigmaMeanYv(),evtCuts->GetSigmaMeanZv()};
0aaa8b91 101 initVertex = new AliESDVertex(pos,err);
102 vertexer.SetVtxStart(initVertex);
103 vertexer.SetConstraintOn();
104 }
105
0aaa8b91 106 Double_t maxDCAr = accCuts->GetMaxDCAr();
107 Double_t maxDCAz = accCuts->GetMaxDCAz();
108 Int_t minTPCClust = trackCuts->GetMinNClusterTPC();
109
bad4ba69 110 //vertexer.SetTPCMode(Double_t dcacut=0.1, Double_t dcacutIter0=1.0, Double_t maxd0z0=5.0, Int_t minCls=10, Int_t mintrks=1, Double_t nsigma=3., Double_t mindetfitter=0.1, Double_t maxtgl=1.5, Double_t fidR=3., Double_t fidZ=30., Int_t finderAlgo=1, Int_t finderAlgoIter0=4);
0aaa8b91 111 vertexer.SetTPCMode(0.1,1.0,5.0,minTPCClust,1,3.,0.1,2.0,maxDCAr,maxDCAz,1,4);
112
113 // TPC track preselection
114 Int_t ntracks = aEsd->GetNumberOfTracks();
115 TObjArray array(ntracks);
116 UShort_t *id = new UShort_t[ntracks];
117
118 Int_t count=0;
119 for (Int_t i=0;i <ntracks; i++) {
120 AliESDtrack *t = aEsd->GetTrack(i);
121 if (!t) continue;
122 if (t->Charge() == 0) continue;
123 if (!t->GetTPCInnerParam()) continue;
124 if (t->GetTPCNcls()<vertexer.GetMinClusters()) continue;
125 AliExternalTrackParam *tpcTrack = new AliExternalTrackParam(*(t->GetTPCInnerParam()));
126 if(tpcTrack) {
127 array.AddLast(tpcTrack);
128 id[count] = (UShort_t)t->GetID();
129 count++;
130 }
131 }
132 AliESDVertex *vTPC = vertexer.VertexForSelectedTracks(&array,id, kTRUE, kTRUE, bUseMeanVertex);
bad4ba69 133
134 // set recreated TPC vertex
0aaa8b91 135 aEsd->SetPrimaryVertexTPC(vTPC);
136
137 for (Int_t i=0; i<aEsd->GetNumberOfTracks(); i++) {
138 AliESDtrack *t = aEsd->GetTrack(i);
774986ef 139 if(!t) continue;
140
141 Double_t x[3]; t->GetXYZ(x);
142 Double_t b[3]; AliTracker::GetBxByBz(x,b);
143 t->RelateToVertexTPCBxByBz(vTPC, b, kVeryBig);
0aaa8b91 144 }
145
146 delete vTPC;
147 array.Delete();
148 delete [] id; id=NULL;
149
150 }
151 vertex = aEsd->GetPrimaryVertexTPC();
152 if (debug)
774986ef 153 Printf("AlidNdPtHelper::GetVertex: Returning vertex from tracks");
154 }
155 else
156 Printf("AlidNdPtHelper::GetVertex: ERROR: Invalid second argument %d", analysisMode);
0aaa8b91 157
158 if (!vertex) {
159 if (debug)
160 Printf("AlidNdPtHelper::GetVertex: No vertex found in ESD");
161 return 0;
162 }
163
164 if (debug)
165 {
166 Printf("AlidNdPtHelper::GetVertex: Returning valid vertex: %s", vertex->GetTitle());
167 vertex->Print();
168 }
169
170 if(initVertex) delete initVertex; initVertex=NULL;
171 return vertex;
172}
173
bad4ba69 174//____________________________________________________________________
791aaf54 175Bool_t AlidNdPtHelper::TestRecVertex(const AliESDVertex* vertex, const AliESDVertex* vertexSPD, AnalysisMode analysisMode, Bool_t debug)
bad4ba69 176{
177 // Checks if a vertex meets the needed quality criteria
178 if(!vertex) return kFALSE;
774986ef 179 if(!vertex->GetStatus()) return kFALSE;
bad4ba69 180
181 Float_t requiredZResolution = -1;
774986ef 182 if (analysisMode == kSPD || analysisMode == kTPCITS ||
791aaf54 183 analysisMode == kTPCSPDvtx || analysisMode == kTPCSPDvtxUpdate || analysisMode == kTPCITSHybrid ||
184 analysisMode == kTPCTrackSPDvtx || analysisMode == kTPCTrackSPDvtxUpdate || analysisMode == kTPCITSHybridTrackSPDvtx || analysisMode == kTPCITSHybridTrackSPDvtxDCArPt
695facdf 185 || analysisMode == kITSStandAloneTrackSPDvtx || analysisMode == kITSStandAloneTPCTrackSPDvtx)
bad4ba69 186 {
774986ef 187 requiredZResolution = 1000;
bad4ba69 188 }
847e74b2 189 else if (analysisMode == kTPC)
bad4ba69 190 requiredZResolution = 10.;
191
774986ef 192 // check resolution
193 Double_t zRes = vertex->GetZRes();
194
195 if (zRes > requiredZResolution) {
196 if (debug)
197 Printf("AlidNdPtHelper::TestVertex: Resolution too poor %f (required: %f", zRes, requiredZResolution);
198 return kFALSE;
199 }
791aaf54 200
201 // always check for SPD vertex
202 if(!vertexSPD) return kFALSE;
203 if(!vertexSPD->GetStatus()) return kFALSE;
204 if (vertexSPD->IsFromVertexerZ())
774986ef 205 {
791aaf54 206 if (vertexSPD->GetDispersion() > 0.02)
774986ef 207 {
208 if (debug)
209 Printf("AliPWG0Helper::TestVertex: Delta Phi too large in Vertexer Z: %f (required: %f", vertex->GetDispersion(), 0.02);
210 return kFALSE;
211 }
212 }
213
214 /*
bad4ba69 215 // check Ncontributors
216 if (vertex->GetNContributors() <= 0) {
217 if (debug){
218 Printf("AlidNdPtHelper::GetVertex: NContributors() <= 0: %d",vertex->GetNContributors());
219 Printf("AlidNdPtHelper::GetVertex: NIndices(): %d",vertex->GetNIndices());
220 vertex->Print();
221 }
222 return kFALSE;
223 }
774986ef 224 */
bad4ba69 225
226 return kTRUE;
227}
228
791aaf54 229//____________________________________________________________________
230Bool_t AlidNdPtHelper::IsGoodImpPar(AliESDtrack *const track)
231{
232//
233// check whether particle has good DCAr(Pt) impact
234// parameter. Only for TPC+ITS tracks (7*sigma cut)
235// Origin: Andrea Dainese
236//
237
238Float_t d0z0[2],covd0z0[3];
239track->GetImpactParameters(d0z0,covd0z0);
240Float_t sigma= 0.0050+0.0060/TMath::Power(track->Pt(),0.9);
241Float_t d0max = 7.*sigma;
242if(TMath::Abs(d0z0[0]) < d0max) return kTRUE;
243
244return kFALSE;
245}
246
0aaa8b91 247//____________________________________________________________________
f2dec884 248Bool_t AlidNdPtHelper::IsPrimaryParticle(AliStack* const stack, Int_t idx, ParticleMode particleMode)
0aaa8b91 249{
774986ef 250//
0aaa8b91 251// check primary particles
847e74b2 252// depending on the particle mode
0aaa8b91 253//
254 if(!stack) return kFALSE;
255
256 TParticle* particle = stack->Particle(idx);
257 if (!particle) return kFALSE;
258
259 // only charged particles
260 Double_t charge = particle->GetPDG()->Charge()/3.;
f2dec884 261 if (TMath::Abs(charge) < 0.001) return kFALSE;
0aaa8b91 262
263 Int_t pdg = TMath::Abs(particle->GetPdgCode());
264
265 // physical primary
266 Bool_t prim = stack->IsPhysicalPrimary(idx);
267
847e74b2 268 if(particleMode==kMCPion) {
0aaa8b91 269 if(prim && pdg==kPiPlus) return kTRUE;
270 else return kFALSE;
271 }
272
847e74b2 273 if (particleMode==kMCKaon) {
0aaa8b91 274 if(prim && pdg==kKPlus) return kTRUE;
275 else return kFALSE;
276 }
277
847e74b2 278 if (particleMode==kMCProton) {
0aaa8b91 279 if(prim && pdg==kProton) return kTRUE;
280 else return kFALSE;
281 }
282
17e8c701 283 if(particleMode==kMCRest) {
284 if(prim && pdg!=kPiPlus && pdg!=kKPlus && pdg!=kProton) return kTRUE;
285 else return kFALSE;
286 }
287
0aaa8b91 288return prim;
289}
290
d269b0e6 291//____________________________________________________________________
f2dec884 292Bool_t AlidNdPtHelper::IsCosmicTrack(AliESDtrack *const track1, AliESDtrack *const track2)
d269b0e6 293{
294//
295// check cosmic tracks
296//
297 if(!track1) return kFALSE;
298 if(!track2) return kFALSE;
d269b0e6 299
774986ef 300 //
301 // cosmic tracks in TPC
302 //
303 //if( TMath::Abs( track1->Theta() - track2->Theta() ) < 0.004 &&
304 // ((TMath::Abs(track1->Phi()-track2->Phi()) - TMath::Pi() )<0.004) &&
305 //if( track1->Pt() > 4.0 && (TMath::Abs(track1->Phi()-track2->Phi())-TMath::Pi())<0.1
306 // && (TMath::Abs(track1->Eta()+track2->Eta())-0.1) < 0.0 && (track1->Charge()+track2->Charge()) == 0)
307
308 //Float_t scaleF= 6.0;
309 if ( track1->Pt() > 4 && track2->Pt() > 4 &&
310 //(TMath::Abs(track1->GetSnp()-track2->GetSnp())-2.) < scaleF * TMath::Sqrt(track1->GetSigmaSnp2()+track2->GetSigmaSnp2()) &&
311 //TMath::Abs(track1->GetTgl()-track2->GetTgl()) < scaleF * TMath::Sqrt(track1->GetSigmaTgl2()+track2->GetSigmaTgl2()) &&
312 //TMath::Abs(track1->OneOverPt()-track2->OneOverPt()) < scaleF * TMath::Sqrt(track1->GetSigma1Pt2()+track2->GetSigma1Pt2()) &&
313 (track1->Charge()+track2->Charge()) == 0 &&
314 track1->Eta()*track2->Eta()<0.0 && TMath::Abs(track1->Eta()+track2->Eta())<0.03 &&
315 TMath::Abs(TMath::Abs(track1->Phi()-track2->Phi())-TMath::Pi())<0.1
316 )
d269b0e6 317 {
774986ef 318 printf("COSMIC candidate \n");
d269b0e6 319
774986ef 320 printf("track1->Pt() %f, track1->Theta() %f, track1->Eta() %f, track1->Phi() %f, track1->Charge() %d \n", track1->Pt(), track1->Theta(), track1->Eta(), track1->Phi(), track1->Charge());
321 printf("track2->Pt() %f, track2->Theta() %f, track2->Eta() %f, track2->Phi() %f, track2->Charge() %d \n", track2->Pt(), track2->Theta(), track2->Eta(), track2->Phi(), track2->Charge());
322 printf("dtheta %f, deta %f, dphi %f, dq %d \n", track1->Theta()-track2->Theta(), track1->Eta()-track2->Eta(), track1->Phi()-track2->Phi(), track1->Charge()+track2->Charge());
323 printf("dsphi %f, errsphi %f, dtanl %f, errtanl %f \n", TMath::Abs(track1->GetSnp()-track2->GetSnp()), TMath::Sqrt(track1->GetSigmaSnp2()+track2->GetSigmaSnp2()), TMath::Abs(track1->GetTgl()-track2->GetTgl()), TMath::Sqrt(track1->GetSigmaTgl2()+track2->GetSigmaTgl2()));
324 return kTRUE;
325 }
847e74b2 326
327return kFALSE;
328}
329
0aaa8b91 330//____________________________________________________________________
70fdd197 331void AlidNdPtHelper::PrintConf(AnalysisMode analysisMode, AliTriggerAnalysis::Trigger trigger)
0aaa8b91 332{
333 //
334 // Prints the given configuration
335 //
336
337 TString str(">>>> Running with ");
338
339 switch (analysisMode)
340 {
341 case kInvalid: str += "invalid setting"; break;
342 case kSPD : str += "SPD-only"; break;
343 case kTPC : str += "TPC-only"; break;
344 case kTPCITS : str += "Global tracking"; break;
345 case kTPCSPDvtx : str += "TPC tracking + SPD event vertex"; break;
847e74b2 346 case kTPCSPDvtxUpdate : str += "TPC tracks updated with SPD event vertex point"; break;
791aaf54 347 case kTPCTrackSPDvtx : str += "TPC tracking + Tracks event vertex or SPD event vertex"; break;
348 case kTPCTrackSPDvtxUpdate : str += "TPC tracks updated with Track or SPD event vertex point"; break;
774986ef 349 case kTPCITSHybrid : str += "TPC tracking + ITS refit + >1 SPD cluster"; break;
791aaf54 350 case kTPCITSHybridTrackSPDvtx : str += "TPC tracking + ITS refit + >1 SPD cluster + Tracks event vertex or SPD event vertex"; break;
351 case kTPCITSHybridTrackSPDvtxDCArPt : str += "TPC tracking + ITS refit + >1 SPD cluster + Tracks event vertex or SPD event vertex + DCAr(pt)"; break;
695facdf 352 case kITSStandAloneTrackSPDvtx : str += "ITS standalone + Tracks event vertex or SPD event vertex + DCAr(pt)"; break;
353 case kITSStandAloneTPCTrackSPDvtx : str += "kITSStandAloneTPCTrackSPDvtx + TPC stand alone track + Tracks event vertex or SPD event vertex + DCAr(pt)"; break;
0aaa8b91 354 case kMCRec : str += "TPC tracking + Replace rec. with MC values"; break;
0aaa8b91 355 }
356 str += " and trigger ";
357
70fdd197 358 str += AliTriggerAnalysis::GetTriggerName(trigger);
0aaa8b91 359
360 str += " <<<<";
361
362 Printf("%s", str.Data());
363}
364
365//____________________________________________________________________
366Int_t AlidNdPtHelper::ConvertPdgToPid(TParticle *particle) {
367//
368// Convert Abs(pdg) to pid
369// (0 - e, 1 - muons, 2 - pions, 3 - kaons, 4 - protons, 5 -all rest)
370//
371Int_t pid=-1;
372
373 if (TMath::Abs(particle->GetPdgCode()) == kElectron) { pid = 0; }
374 else if (TMath::Abs(particle->GetPdgCode()) == kMuonMinus) { pid = 1; }
375 else if (TMath::Abs(particle->GetPdgCode()) == kPiPlus) { pid = 2; }
376 else if (TMath::Abs(particle->GetPdgCode()) == kKPlus) { pid = 3; }
377 else if (TMath::Abs(particle->GetPdgCode()) == kProton) { pid = 4; }
378 else { pid = 5; }
379
380return pid;
381}
382
383//_____________________________________________________________________________
f2dec884 384TH1F* AlidNdPtHelper::CreateResHisto(TH2F* const hRes2, TH1F **phMean, Int_t integ, Bool_t drawBinFits, Int_t minHistEntries)
0aaa8b91 385{
bad4ba69 386//
387// Create mean and resolution
388// histograms
389//
0aaa8b91 390 TVirtualPad* currentPad = gPad;
391 TAxis* axis = hRes2->GetXaxis();
392 Int_t nBins = axis->GetNbins();
393 Bool_t overflowBinFits = kFALSE;
394 TH1F* hRes, *hMean;
395 if (axis->GetXbins()->GetSize()){
396 hRes = new TH1F("hRes", "", nBins, axis->GetXbins()->GetArray());
397 hMean = new TH1F("hMean", "", nBins, axis->GetXbins()->GetArray());
398 }
399 else{
400 hRes = new TH1F("hRes", "", nBins, axis->GetXmin(), axis->GetXmax());
401 hMean = new TH1F("hMean", "", nBins, axis->GetXmin(), axis->GetXmax());
402
403 }
404 hRes->SetStats(false);
405 hRes->SetOption("E");
406 hRes->SetMinimum(0.);
407 //
408 hMean->SetStats(false);
409 hMean->SetOption("E");
410
411 // create the fit function
412 TF1 * fitFunc = new TF1("G","[0]*exp(-(x-[1])*(x-[1])/(2.*[2]*[2]))",-3,3);
413
414 fitFunc->SetLineWidth(2);
415 fitFunc->SetFillStyle(0);
416 // create canvas for fits
417 TCanvas* canBinFits = NULL;
418 Int_t nPads = (overflowBinFits) ? nBins+2 : nBins;
419 Int_t nx = Int_t(sqrt(nPads-1.));// + 1;
420 Int_t ny = (nPads-1) / nx + 1;
421 if (drawBinFits) {
422 canBinFits = (TCanvas*)gROOT->FindObject("canBinFits");
423 if (canBinFits) delete canBinFits;
424 canBinFits = new TCanvas("canBinFits", "fits of bins", 200, 100, 500, 700);
425 canBinFits->Divide(nx, ny);
426 }
427
428 // loop over x bins and fit projection
429 Int_t dBin = ((overflowBinFits) ? 1 : 0);
430 for (Int_t bin = 1-dBin; bin <= nBins+dBin; bin++) {
431 if (drawBinFits) canBinFits->cd(bin + dBin);
432 Int_t bin0=TMath::Max(bin-integ,0);
433 Int_t bin1=TMath::Min(bin+integ,nBins);
434 TH1D* hBin = hRes2->ProjectionY("hBin", bin0, bin1);
435 //
436 if (hBin->GetEntries() > minHistEntries) {
437 fitFunc->SetParameters(hBin->GetMaximum(),hBin->GetMean(),hBin->GetRMS());
438 hBin->Fit(fitFunc,"s");
439 Double_t sigma = TMath::Abs(fitFunc->GetParameter(2));
440
441 if (sigma > 0.){
442 hRes->SetBinContent(bin, TMath::Abs(fitFunc->GetParameter(2)));
443 hMean->SetBinContent(bin, fitFunc->GetParameter(1));
444 }
445 else{
446 hRes->SetBinContent(bin, 0.);
447 hMean->SetBinContent(bin,0);
448 }
449 hRes->SetBinError(bin, fitFunc->GetParError(2));
450 hMean->SetBinError(bin, fitFunc->GetParError(1));
451
452 //
453 //
454
455 } else {
456 hRes->SetBinContent(bin, 0.);
457 hRes->SetBinError(bin, 0.);
458 hMean->SetBinContent(bin, 0.);
459 hMean->SetBinError(bin, 0.);
460 }
461
462
463 if (drawBinFits) {
464 char name[256];
465 if (bin == 0) {
466 sprintf(name, "%s < %.4g", axis->GetTitle(), axis->GetBinUpEdge(bin));
467 } else if (bin == nBins+1) {
468 sprintf(name, "%.4g < %s", axis->GetBinLowEdge(bin), axis->GetTitle());
469 } else {
470 sprintf(name, "%.4g < %s < %.4g", axis->GetBinLowEdge(bin),
471 axis->GetTitle(), axis->GetBinUpEdge(bin));
472 }
473 canBinFits->cd(bin + dBin);
474 hBin->SetTitle(name);
475 hBin->SetStats(kTRUE);
476 hBin->DrawCopy("E");
477 canBinFits->Update();
478 canBinFits->Modified();
479 canBinFits->Update();
480 }
481
482 delete hBin;
483 }
484
485 delete fitFunc;
486 currentPad->cd();
487 *phMean = hMean;
488 return hRes;
489}
490
491//_____________________________________________________________________________
492TH1F* AlidNdPtHelper::MakeResol(TH2F * his, Int_t integ, Bool_t type, Bool_t drawBins, Int_t minHistEntries){
493// Create resolution histograms
494
495 TH1F *hisr=0, *hism=0;
496 if (!gPad) new TCanvas;
0aaa8b91 497 hisr = CreateResHisto(his,&hism,integ,drawBins,minHistEntries);
498 if (type) return hism;
499 else return hisr;
500
501return hisr;
502}
503
504//_____________________________________________________________________________
bad4ba69 505TObjArray* AlidNdPtHelper::GetAllChargedTracks(AliESDEvent *esdEvent, AnalysisMode analysisMode)
0aaa8b91 506{
507 //
508 // all charged TPC particles
509 //
510 TObjArray *allTracks = new TObjArray();
511 if(!allTracks) return allTracks;
512
513 AliESDtrack *track=0;
514 for (Int_t iTrack = 0; iTrack < esdEvent->GetNumberOfTracks(); iTrack++)
515 {
847e74b2 516 if(analysisMode == AlidNdPtHelper::kTPC) {
774986ef 517 //
847e74b2 518 // track must be deleted by user
774986ef 519 // esd track parameters are replaced by TPCinner
520 //
bad4ba69 521 track = AliESDtrackCuts::GetTPCOnlyTrack(esdEvent,iTrack);
847e74b2 522 if(!track) continue;
523 }
774986ef 524 else if (analysisMode == AlidNdPtHelper::kTPCSPDvtx || analysisMode == AlidNdPtHelper::kTPCSPDvtxUpdate)
847e74b2 525 {
774986ef 526 //
847e74b2 527 // track must be deleted by the user
774986ef 528 // esd track parameters are replaced by TPCinner
529 //
847e74b2 530 track = AlidNdPtHelper::GetTPCOnlyTrackSPDvtx(esdEvent,iTrack,kFALSE);
531 if(!track) continue;
532 }
791aaf54 533 else if (analysisMode == AlidNdPtHelper::kTPCTrackSPDvtx || analysisMode == AlidNdPtHelper::kTPCTrackSPDvtxUpdate)
534 {
535 //
536 // track must be deleted by the user
537 // esd track parameters are replaced by TPCinner
538 //
539 track = AlidNdPtHelper::GetTPCOnlyTrackTrackSPDvtx(esdEvent,iTrack,kFALSE);
540 if(!track) continue;
541 }
695facdf 542 else if(analysisMode == AlidNdPtHelper::kTPCITSHybrid )
774986ef 543 {
544 track = AlidNdPtHelper::GetTrackSPDvtx(esdEvent,iTrack,kFALSE);
545 }
695facdf 546 else if(analysisMode == AlidNdPtHelper::kTPCITSHybridTrackSPDvtx || analysisMode == AlidNdPtHelper::kTPCITSHybridTrackSPDvtxDCArPt || kITSStandAloneTrackSPDvtx || kITSStandAloneTPCTrackSPDvtx)
791aaf54 547 {
548 track = AlidNdPtHelper::GetTrackTrackSPDvtx(esdEvent,iTrack,kFALSE);
549 }
774986ef 550 else
551 {
552 track = esdEvent->GetTrack(iTrack);
0aaa8b91 553 }
774986ef 554
0aaa8b91 555 if(!track) continue;
556
557 if(track->Charge()==0) {
791aaf54 558 if(analysisMode == AlidNdPtHelper::kTPC ||
559 analysisMode == AlidNdPtHelper::kTPCSPDvtx || analysisMode == AlidNdPtHelper::kTPCTrackSPDvtx ||
560 analysisMode == AlidNdPtHelper::kTPCSPDvtxUpdate || analysisMode == AlidNdPtHelper::kTPCTrackSPDvtxUpdate)
847e74b2 561 {
0aaa8b91 562 delete track; continue;
563 } else {
564 continue;
565 }
566 }
567
568 allTracks->Add(track);
569 }
bad4ba69 570
791aaf54 571 if(analysisMode == AlidNdPtHelper::kTPC ||
572 analysisMode == AlidNdPtHelper::kTPCSPDvtx || analysisMode == AlidNdPtHelper::kTPCTrackSPDvtx ||
573 analysisMode == AlidNdPtHelper::kTPCSPDvtxUpdate || analysisMode == AlidNdPtHelper::kTPCTrackSPDvtxUpdate) {
bad4ba69 574
575 allTracks->SetOwner(kTRUE);
576 }
0aaa8b91 577
578return allTracks;
579}
580
847e74b2 581//_____________________________________________________________________________
582AliESDtrack *AlidNdPtHelper::GetTPCOnlyTrackSPDvtx(AliESDEvent* esdEvent, Int_t iTrack, Bool_t bUpdate)
583{
584//
585// Create ESD tracks from TPCinner parameters.
586// Propagte to DCA to SPD vertex.
587// Update using SPD vertex point (parameter)
588//
589// It is user responsibility to delete these tracks
590//
591
592 if (!esdEvent) return NULL;
593 if (!esdEvent->GetPrimaryVertexSPD() ) { return NULL; }
594 if (!esdEvent->GetPrimaryVertexSPD()->GetStatus() ) { return NULL; }
595
596 //
597 AliESDtrack* track = esdEvent->GetTrack(iTrack);
598 if (!track)
599 return NULL;
600
774986ef 601 Bool_t isOK = kFALSE;
602 Double_t x[3]; track->GetXYZ(x);
603 Double_t b[3]; AliTracker::GetBxByBz(x,b);
604
847e74b2 605 // create new ESD track
606 AliESDtrack *tpcTrack = new AliESDtrack();
607
608 // relate TPC-only tracks (TPCinner) to SPD vertex
609 AliExternalTrackParam cParam;
610 if(bUpdate) {
774986ef 611 isOK = track->RelateToVertexTPCBxByBz(esdEvent->GetPrimaryVertexSPD(),b,kVeryBig,&cParam);
847e74b2 612 track->Set(cParam.GetX(),cParam.GetAlpha(),cParam.GetParameter(),cParam.GetCovariance());
613
614 // reject fake tracks
615 if(track->Pt() > 10000.) {
616 ::Error("Exclude no physical tracks","pt>10000. GeV");
617 delete tpcTrack;
618 return NULL;
619 }
620 }
621 else {
774986ef 622 isOK = track->RelateToVertexTPCBxByBz(esdEvent->GetPrimaryVertexSPD(), b, kVeryBig);
847e74b2 623 }
624
625 // only true if we have a tpc track
626 if (!track->FillTPCOnlyTrack(*tpcTrack))
627 {
628 delete tpcTrack;
629 return NULL;
630 }
774986ef 631
632 if(!isOK) return NULL;
847e74b2 633
634return tpcTrack;
635}
636
791aaf54 637//_____________________________________________________________________________
638AliESDtrack *AlidNdPtHelper::GetTPCOnlyTrackTrackSPDvtx(AliESDEvent* esdEvent, Int_t iTrack, Bool_t bUpdate)
639{
640//
641// Create ESD tracks from TPCinner parameters.
642// Propagte to DCA to Track or SPD vertex.
643// Update using SPD vertex point (parameter)
644//
645// It is user responsibility to delete these tracks
646//
647 if (!esdEvent) return NULL;
648 const AliESDVertex *vertex = esdEvent->GetPrimaryVertexTracks();
649 if(vertex->GetNContributors()<1) {
650 // SPD vertex
651 vertex = esdEvent->GetPrimaryVertexSPD();
652 }
653 if(!vertex) return NULL;
654
655 //
656 AliESDtrack* track = esdEvent->GetTrack(iTrack);
657 if (!track)
658 return NULL;
659
660 Bool_t isOK = kFALSE;
661 Double_t x[3]; track->GetXYZ(x);
662 Double_t b[3]; AliTracker::GetBxByBz(x,b);
663
664 // create new ESD track
665 AliESDtrack *tpcTrack = new AliESDtrack();
666
667 // relate TPC-only tracks (TPCinner) to SPD vertex
668 AliExternalTrackParam cParam;
669 if(bUpdate) {
670 isOK = track->RelateToVertexTPCBxByBz(vertex,b,kVeryBig,&cParam);
671 track->Set(cParam.GetX(),cParam.GetAlpha(),cParam.GetParameter(),cParam.GetCovariance());
672
673 // reject fake tracks
674 if(track->Pt() > 10000.) {
675 ::Error("Exclude no physical tracks","pt>10000. GeV");
676 delete tpcTrack;
677 return NULL;
678 }
679 }
680 else {
681 isOK = track->RelateToVertexTPCBxByBz(vertex, b, kVeryBig);
682 }
683
684 // only true if we have a tpc track
685 if (!track->FillTPCOnlyTrack(*tpcTrack))
686 {
687 delete tpcTrack;
688 return NULL;
689 }
690
691 if(!isOK) return NULL;
692
693return tpcTrack;
694}
695
774986ef 696//_____________________________________________________________________________
697AliESDtrack *AlidNdPtHelper::GetTrackSPDvtx(AliESDEvent* esdEvent, Int_t iTrack, Bool_t bUpdate)
698{
699//
700// Propagte track to DCA to SPD vertex.
701// Update using SPD vertex point (parameter)
702//
703 if (!esdEvent) return NULL;
704 if (!esdEvent->GetPrimaryVertexSPD() ) { return NULL; }
705 if (!esdEvent->GetPrimaryVertexSPD()->GetStatus() ) { return NULL; }
706
707 //
708 AliESDtrack* track = esdEvent->GetTrack(iTrack);
709 if (!track)
710 return NULL;
711
712 Bool_t isOK = kFALSE;
713 Double_t x[3]; track->GetXYZ(x);
714 Double_t b[3]; AliTracker::GetBxByBz(x,b);
715
716 // relate tracks to SPD vertex
717 AliExternalTrackParam cParam;
718 if(bUpdate) {
719 isOK = track->RelateToVertexBxByBz(esdEvent->GetPrimaryVertexSPD(),b,kVeryBig,&cParam);
720 track->Set(cParam.GetX(),cParam.GetAlpha(),cParam.GetParameter(),cParam.GetCovariance());
721
722 // reject fake tracks
723 if(track->Pt() > 10000.) {
724 ::Error("Exclude no physical tracks","pt>10000. GeV");
725 return NULL;
726 }
727 }
728 else {
729 isOK = track->RelateToVertexBxByBz(esdEvent->GetPrimaryVertexSPD(), b, kVeryBig);
730 }
731
732 if(!isOK) return NULL;
733
734return track;
735}
736
791aaf54 737//_____________________________________________________________________________
738AliESDtrack *AlidNdPtHelper::GetTrackTrackSPDvtx(AliESDEvent* esdEvent, Int_t iTrack, Bool_t bUpdate)
739{
740//
741// Propagte track to DCA to Track or SPD vertex.
742// Update using SPD vertex point (parameter)
743//
744 if (!esdEvent) return NULL;
745
746 const AliESDVertex *vertex = esdEvent->GetPrimaryVertexTracks();
747 if(vertex->GetNContributors()<1) {
748 // SPD vertex
749 vertex = esdEvent->GetPrimaryVertexSPD();
750 }
751 if(!vertex) return NULL;
752
753 //
754 AliESDtrack* track = esdEvent->GetTrack(iTrack);
755 if (!track)
756 return NULL;
757
758 Bool_t isOK = kFALSE;
759 Double_t x[3]; track->GetXYZ(x);
760 Double_t b[3]; AliTracker::GetBxByBz(x,b);
761
762 // relate tracks to SPD vertex
763 AliExternalTrackParam cParam;
764 if(bUpdate) {
765 isOK = track->RelateToVertexBxByBz(vertex,b,kVeryBig,&cParam);
766 track->Set(cParam.GetX(),cParam.GetAlpha(),cParam.GetParameter(),cParam.GetCovariance());
767
768 // reject fake tracks
769 if(track->Pt() > 10000.) {
770 ::Error("Exclude no physical tracks","pt>10000. GeV");
771 return NULL;
772 }
773 }
774 else {
775 isOK = track->RelateToVertexBxByBz(vertex, b, kVeryBig);
776 }
777
778 if(!isOK) return NULL;
779
780return track;
781}
782
0aaa8b91 783//_____________________________________________________________________________
f2dec884 784Int_t AlidNdPtHelper::GetTPCMBTrackMult(AliESDEvent *const esdEvent, AlidNdPtEventCuts *const evtCuts, AlidNdPtAcceptanceCuts *const accCuts, AliESDtrackCuts *const trackCuts)
0aaa8b91 785{
786 //
787 // get MB event track multiplicity
788 //
789 if(!esdEvent)
790 {
791 ::Error("AlidNdPtHelper::GetTPCMBTrackMult()","esd event is NULL");
792 return 0;
793 }
794
795 if(!evtCuts || !accCuts || !trackCuts)
796 {
797 ::Error("AlidNdPtHelper::GetTPCMBTrackMult()","cuts not available");
798 return 0;
799 }
800
801 //
802 Double_t pos[3]={evtCuts->GetMeanXv(),evtCuts->GetMeanYv(),evtCuts->GetMeanZv()};
803 Double_t err[3]={evtCuts->GetSigmaMeanXv(),evtCuts->GetSigmaMeanYv(),evtCuts->GetSigmaMeanZv()};
804 AliESDVertex vtx0(pos,err);
805
806 //
807 Float_t maxDCAr = accCuts->GetMaxDCAr();
808 Float_t maxDCAz = accCuts->GetMaxDCAz();
809 Float_t minTPCClust = trackCuts->GetMinNClusterTPC();
810 //
811 Int_t ntracks = esdEvent->GetNumberOfTracks();
812 Double_t dca[2],cov[3];
813 Int_t mult=0;
814 for (Int_t i=0;i <ntracks; i++){
815 AliESDtrack *t = esdEvent->GetTrack(i);
816 if (!t) continue;
817 if (t->Charge() == 0) continue;
818 if (!t->GetTPCInnerParam()) continue;
819 if (t->GetTPCNcls()<minTPCClust) continue;
820 //
774986ef 821 Double_t x[3]; t->GetXYZ(x);
822 Double_t b[3]; AliTracker::GetBxByBz(x,b);
823 const Double_t kMaxStep = 1; //max step over the material
824
0aaa8b91 825 AliExternalTrackParam *tpcTrack = new AliExternalTrackParam(*(t->GetTPCInnerParam()));
774986ef 826 if (!tpcTrack->PropagateToDCABxByBz(&vtx0,b,kMaxStep,dca,cov))
0aaa8b91 827 {
828 if(tpcTrack) delete tpcTrack;
829 continue;
830 }
831 //
832 if (TMath::Abs(dca[0])>maxDCAr || TMath::Abs(dca[1])>maxDCAz) {
833 if(tpcTrack) delete tpcTrack;
834 continue;
835 }
836
837 mult++;
838
839 if(tpcTrack) delete tpcTrack;
840 }
841
842return mult;
843}
844
845//_____________________________________________________________________________
f2dec884 846Int_t AlidNdPtHelper::GetTPCMBPrimTrackMult(AliESDEvent *const esdEvent, AliStack *const stack, AlidNdPtEventCuts *const evtCuts, AlidNdPtAcceptanceCuts *const accCuts, AliESDtrackCuts *const trackCuts)
0aaa8b91 847{
848 //
849 // get MB primary event track multiplicity
850 //
851 if(!esdEvent)
852 {
853 ::Error("AlidNdPtHelper::GetTPCMBPrimTrackMult()","esd event is NULL");
854 return 0;
855 }
856
857 if(!stack)
858 {
859 ::Error("AlidNdPtHelper::GetTPCMBPrimTrackMult()","esd event is NULL");
860 return 0;
861 }
862
863 if(!evtCuts || !accCuts || !trackCuts)
864 {
865 ::Error("AlidNdPtHelper::GetTPCMBPrimTrackMult()","cuts not available");
866 return 0;
867 }
868
869 //
870 Double_t pos[3]={evtCuts->GetMeanXv(),evtCuts->GetMeanYv(),evtCuts->GetMeanZv()};
871 Double_t err[3]={evtCuts->GetSigmaMeanXv(),evtCuts->GetSigmaMeanYv(),evtCuts->GetSigmaMeanZv()};
872 AliESDVertex vtx0(pos,err);
873
874 //
875 Float_t maxDCAr = accCuts->GetMaxDCAr();
876 Float_t maxDCAz = accCuts->GetMaxDCAz();
877 Float_t minTPCClust = trackCuts->GetMinNClusterTPC();
878
879 //
880 Int_t ntracks = esdEvent->GetNumberOfTracks();
881 Double_t dca[2],cov[3];
882 Int_t mult=0;
883 for (Int_t i=0;i <ntracks; i++){
884 AliESDtrack *t = esdEvent->GetTrack(i);
885 if (!t) continue;
886 if (t->Charge() == 0) continue;
887 if (!t->GetTPCInnerParam()) continue;
888 if (t->GetTPCNcls()<minTPCClust) continue;
889 //
774986ef 890 Double_t x[3]; t->GetXYZ(x);
891 Double_t b[3]; AliTracker::GetBxByBz(x,b);
892 const Double_t kMaxStep = 1; //max step over the material
893
0aaa8b91 894 AliExternalTrackParam *tpcTrack = new AliExternalTrackParam(*(t->GetTPCInnerParam()));
774986ef 895 if (!tpcTrack->PropagateToDCABxByBz(&vtx0,b,kMaxStep,dca,cov))
0aaa8b91 896 {
897 if(tpcTrack) delete tpcTrack;
898 continue;
899 }
900 //
901 if (TMath::Abs(dca[0])>maxDCAr || TMath::Abs(dca[1])>maxDCAz) {
902 if(tpcTrack) delete tpcTrack;
903 continue;
904 }
905
906 Int_t label = TMath::Abs(t->GetLabel());
907 TParticle *part = stack->Particle(label);
908 if(!part) {
909 if(tpcTrack) delete tpcTrack;
910 continue;
911 }
912 if(!stack->IsPhysicalPrimary(label))
913 {
914 if(tpcTrack) delete tpcTrack;
915 continue;
916 }
917
918 mult++;
919
920 if(tpcTrack) delete tpcTrack;
921 }
922
923return mult;
924}
925
926
791aaf54 927//_____________________________________________________________________________
928Double_t AlidNdPtHelper::GetStrangenessCorrFactor(const Double_t pt)
929{
930// data driven correction factor for secondaries
931// underestimated secondaries with strangeness in Pythia (A. Dainese)
0aaa8b91 932
791aaf54 933//
934// pt=0.17; fact=1
935// pt=0.4; fact=1.07
936// pt=0.6; fact=1.25
937// pt>=1.2; fact=1.5
938//
0aaa8b91 939
791aaf54 940if (pt <= 0.17) return 1.0;
941if (pt <= 0.4) return GetLinearInterpolationValue(0.17,1.0,0.4,1.07, pt);
942if (pt <= 0.6) return GetLinearInterpolationValue(0.4,1.07,0.6,1.25, pt);
943if (pt <= 1.2) return GetLinearInterpolationValue(0.6,1.25,1.2,1.5, pt);
944return 1.5;
945
946}
947
948//___________________________________________________________________________
949Double_t AlidNdPtHelper::GetLinearInterpolationValue(Double_t const x1, Double_t const y1, Double_t const x2, Double_t const y2, const Double_t pt)
950{
951//
952// linear interpolation
953//
954 return ((y2-y1)/(x2-x1))*pt+(y2-(((y2-y1)/(x2-x1))*x2));
955}
0aaa8b91 956
957//_____________________________________________________________________________
f2dec884 958Int_t AlidNdPtHelper::GetMCTrueTrackMult(AliMCEvent *const mcEvent, AlidNdPtEventCuts *const evtCuts, AlidNdPtAcceptanceCuts *const accCuts)
0aaa8b91 959{
960 //
961 // calculate mc event true track multiplicity
962 //
963 if(!mcEvent) return 0;
964
965 AliStack* stack = 0;
966 Int_t mult = 0;
967
968 // MC particle stack
969 stack = mcEvent->Stack();
970 if (!stack) return 0;
971
695facdf 972 //
973 //printf("minZv %f, maxZv %f \n", evtCuts->GetMinZv(), evtCuts->GetMaxZv());
974 //
975
0aaa8b91 976 Bool_t isEventOK = evtCuts->AcceptMCEvent(mcEvent);
977 if(!isEventOK) return 0;
978
979 Int_t nPart = stack->GetNtrack();
980 for (Int_t iMc = 0; iMc < nPart; ++iMc)
981 {
982 TParticle* particle = stack->Particle(iMc);
983 if (!particle)
984 continue;
985
986 // only charged particles
09abaebb 987 if(!particle->GetPDG()) continue;
0aaa8b91 988 Double_t charge = particle->GetPDG()->Charge()/3.;
f2dec884 989 if (TMath::Abs(charge) < 0.001)
0aaa8b91 990 continue;
991
992 // physical primary
993 Bool_t prim = stack->IsPhysicalPrimary(iMc);
994 if(!prim) continue;
995
774986ef 996 // checked accepted without pt cut
997 //if(accCuts->AcceptTrack(particle))
998 if( particle->Eta() > accCuts->GetMinEta() && particle->Eta() < accCuts->GetMaxEta() )
0aaa8b91 999 {
1000 mult++;
1001 }
1002 }
1003
1004return mult;
1005}
1006
1007//_______________________________________________________________________
f2dec884 1008void AlidNdPtHelper::PrintMCInfo(AliStack *const pStack,Int_t label)
0aaa8b91 1009{
1010// print information about particles in the stack
1011
1012 if(!pStack)return;
1013 label = TMath::Abs(label);
1014 TParticle *part = pStack->Particle(label);
1015 Printf("########################");
1016 Printf("%s:%d %d UniqueID %d PDG %d P %3.3f",(char*)__FILE__,__LINE__,label,part->GetUniqueID(),part->GetPdgCode(),part->P());
1017 part->Print();
1018 TParticle* mother = part;
1019 Int_t imo = part->GetFirstMother();
1020 Int_t nprim = pStack->GetNprimary();
1021
1022 while((imo >= nprim)) {
1023 mother = pStack->Particle(imo);
1024 Printf("Mother %s:%d Label %d UniqueID %d PDG %d P %3.3f",(char*)__FILE__,__LINE__,imo,mother->GetUniqueID(),mother->GetPdgCode(),mother->P());
1025 mother->Print();
1026 imo = mother->GetFirstMother();
1027 }
1028
1029 Printf("########################");
1030}
1031
1032
1033//_____________________________________________________________________________
f2dec884 1034TH1* AlidNdPtHelper::GetContCorrHisto(TH1 *const hist)
0aaa8b91 1035{
1036//
1037// get contamination histogram
1038//
1039 if(!hist) return 0;
1040
1041 Int_t nbins = hist->GetNbinsX();
f2dec884 1042 TH1 *hCont = (TH1D *)hist->Clone();
0aaa8b91 1043
1044 for(Int_t i=0; i<=nbins+1; i++) {
1045 Double_t binContent = hist->GetBinContent(i);
1046 Double_t binError = hist->GetBinError(i);
1047
f2dec884 1048 hCont->SetBinContent(i,1.-binContent);
1049 hCont->SetBinError(i,binError);
0aaa8b91 1050 }
1051
f2dec884 1052return hCont;
0aaa8b91 1053}
1054
1055
1056//_____________________________________________________________________________
f2dec884 1057TH1* AlidNdPtHelper::ScaleByBinWidth(TH1 *const hist)
0aaa8b91 1058{
1059//
1060// scale by bin width
1061//
1062 if(!hist) return 0;
1063
f2dec884 1064 TH1 *hScale = (TH1D *)hist->Clone();
1065 hScale->Scale(1.,"width");
0aaa8b91 1066
f2dec884 1067return hScale;
0aaa8b91 1068}
1069
1070//_____________________________________________________________________________
f2dec884 1071TH1* AlidNdPtHelper::CalcRelativeDifference(TH1 *const hist1, TH1 *const hist2)
0aaa8b91 1072{
1073//
1074// calculate rel. difference
1075//
1076
1077 if(!hist1) return 0;
1078 if(!hist2) return 0;
1079
f2dec884 1080 TH1 *h1Clone = (TH1D *)hist1->Clone();
1081 h1Clone->Sumw2();
0aaa8b91 1082
1083 // (rec-mc)/mc
f2dec884 1084 h1Clone->Add(hist2,-1);
1085 h1Clone->Divide(hist2);
0aaa8b91 1086
f2dec884 1087return h1Clone;
0aaa8b91 1088}
1089
1090//_____________________________________________________________________________
f2dec884 1091TH1* AlidNdPtHelper::CalcRelativeDifferenceFun(TH1 *const hist1, TF1 *const fun)
0aaa8b91 1092{
1093//
08a80bfe 1094// calculate rel. difference
0aaa8b91 1095// between histogram and function
1096//
1097 if(!hist1) return 0;
1098 if(!fun) return 0;
1099
f2dec884 1100 TH1 *h1Clone = (TH1D *)hist1->Clone();
1101 h1Clone->Sumw2();
0aaa8b91 1102
1103 //
f2dec884 1104 h1Clone->Add(fun,-1);
1105 h1Clone->Divide(hist1);
0aaa8b91 1106
f2dec884 1107return h1Clone;
0aaa8b91 1108}
1109
1110//_____________________________________________________________________________
f2dec884 1111TH1* AlidNdPtHelper::NormalizeToEvent(TH2 *const hist1, TH1 *const hist2)
0aaa8b91 1112{
1113// normalise to event for a given multiplicity bin
1114// return pt histogram
1115
1116 if(!hist1) return 0;
1117 if(!hist2) return 0;
1118 char name[256];
1119
1120 Int_t nbinsX = hist1->GetNbinsX();
1121 //Int_t nbinsY = hist1->GetNbinsY();
1122
f2dec884 1123 TH1D *histNorm = 0;
0aaa8b91 1124 for(Int_t i=0; i<=nbinsX+1; i++) {
1125 sprintf(name,"mom_%d",i);
1126 TH1D *hist = (TH1D*)hist1->ProjectionY(name,i+1,i+1);
1127
1128 sprintf(name,"mom_norm");
1129 if(i==0) {
f2dec884 1130 histNorm = (TH1D *)hist->Clone(name);
1131 histNorm->Reset();
0aaa8b91 1132 }
1133
1134 Double_t nbEvents = hist2->GetBinContent(i);
1135 if(!nbEvents) { nbEvents = 1.; };
1136
1137 hist->Scale(1./nbEvents);
f2dec884 1138 histNorm->Add(hist);
0aaa8b91 1139 }
1140
f2dec884 1141return histNorm;
0aaa8b91 1142}
1143
1144//_____________________________________________________________________________
f2dec884 1145THnSparse* AlidNdPtHelper::GenerateCorrMatrix(THnSparse *const hist1, THnSparse *const hist2, char *const name) {
0aaa8b91 1146// generate correction matrix
1147if(!hist1 || !hist2) return 0;
1148
1149THnSparse *h =(THnSparse*)hist1->Clone(name);;
1150h->Divide(hist1,hist2,1,1,"B");
1151
1152return h;
1153}
1154
1155//_____________________________________________________________________________
f2dec884 1156TH2* AlidNdPtHelper::GenerateCorrMatrix(TH2 *const hist1, TH2 *const hist2, char *const name) {
0aaa8b91 1157// generate correction matrix
1158if(!hist1 || !hist2) return 0;
1159
1160TH2D *h =(TH2D*)hist1->Clone(name);;
1161h->Divide(hist1,hist2,1,1,"B");
1162
1163return h;
1164}
1165
1166//_____________________________________________________________________________
f2dec884 1167TH1* AlidNdPtHelper::GenerateCorrMatrix(TH1 *const hist1, TH1 *const hist2, char *const name) {
0aaa8b91 1168// generate correction matrix
1169if(!hist1 || !hist2) return 0;
1170
1171TH1D *h =(TH1D*)hist1->Clone(name);;
1172h->Divide(hist1,hist2,1,1,"B");
1173
1174return h;
1175}
1176
1177//_____________________________________________________________________________
f2dec884 1178THnSparse* AlidNdPtHelper::GenerateContCorrMatrix(THnSparse *const hist1, THnSparse *const hist2, char *const name) {
0aaa8b91 1179// generate contamination correction matrix
1180if(!hist1 || !hist2) return 0;
1181
1182THnSparse *hist = GenerateCorrMatrix(hist1, hist2, name);
1183if(!hist) return 0;
1184
1185// only for non ZERO bins!!!!
1186
1187Int_t* coord = new Int_t[hist->GetNdimensions()];
1188memset(coord, 0, sizeof(Int_t) * hist->GetNdimensions());
1189
1190 for (Long64_t i = 0; i < hist->GetNbins(); ++i) {
1191 Double_t v = hist->GetBinContent(i, coord);
1192 hist->SetBinContent(coord, 1.0-v);
1193 //printf("v %f, hist->GetBinContent(i, coord) %f \n",v,hist->GetBinContent(i, coord));
1194 Double_t err = hist->GetBinError(coord);
1195 hist->SetBinError(coord, err);
1196 }
1197
1198delete [] coord;
1199
1200return hist;
1201}
1202
1203//_____________________________________________________________________________
f2dec884 1204TH2* AlidNdPtHelper::GenerateContCorrMatrix(TH2 *const hist1, TH2 *const hist2, char *const name) {
0aaa8b91 1205// generate contamination correction matrix
1206if(!hist1 || !hist2) return 0;
1207
1208TH2 *hist = GenerateCorrMatrix(hist1, hist2, name);
1209if(!hist) return 0;
1210
1211Int_t nBinsX = hist->GetNbinsX();
1212Int_t nBinsY = hist->GetNbinsY();
1213
1214 for (Int_t i = 0; i < nBinsX+1; i++) {
1215 for (Int_t j = 0; j < nBinsY+1; j++) {
1216 Double_t cont = hist->GetBinContent(i,j);
1217 hist->SetBinContent(i,j,1.-cont);
1218 Double_t err = hist->GetBinError(i,j);
1219 hist->SetBinError(i,j,err);
1220 }
1221 }
1222
1223return hist;
1224}
1225
1226//_____________________________________________________________________________
f2dec884 1227TH1* AlidNdPtHelper::GenerateContCorrMatrix(TH1 *const hist1, TH1 *const hist2, char *const name) {
0aaa8b91 1228// generate contamination correction matrix
1229if(!hist1 || !hist2) return 0;
1230
1231TH1 *hist = GenerateCorrMatrix(hist1, hist2, name);
1232if(!hist) return 0;
1233
1234Int_t nBinsX = hist->GetNbinsX();
1235
1236 for (Int_t i = 0; i < nBinsX+1; i++) {
1237 Double_t cont = hist->GetBinContent(i);
1238 hist->SetBinContent(i,1.-cont);
1239 Double_t err = hist->GetBinError(i);
1240 hist->SetBinError(i,err);
1241 }
1242
1243return hist;
1244}
1245
1246//_____________________________________________________________________________
f2dec884 1247const AliESDVertex* AlidNdPtHelper::GetTPCVertexZ(AliESDEvent* const esdEvent, AlidNdPtEventCuts *const evtCuts, AlidNdPtAcceptanceCuts *const accCuts, AliESDtrackCuts *const trackCuts, Float_t fraction, Int_t ntracksMin){
0aaa8b91 1248 //
1249 // TPC Z vertexer
1250 //
bad4ba69 1251 if(!esdEvent)
1252 {
1253 ::Error("AlidNdPtHelper::GetTPCVertexZ()","cuts not available");
1254 return NULL;
1255 }
1256
1257 if(!evtCuts || !accCuts || !trackCuts)
1258 {
1259 ::Error("AlidNdPtHelper::GetTPCVertexZ()","cuts not available");
1260 return NULL;
1261 }
1262
1263 Double_t vtxpos[3]={evtCuts->GetMeanXv(),evtCuts->GetMeanYv(),evtCuts->GetMeanZv()};
1264 Double_t vtxsigma[3]={evtCuts->GetSigmaMeanXv(),evtCuts->GetSigmaMeanYv(),evtCuts->GetSigmaMeanZv()};
0aaa8b91 1265 AliESDVertex vtx0(vtxpos,vtxsigma);
bad4ba69 1266
1267 Double_t maxDCAr = accCuts->GetMaxDCAr();
1268 Double_t maxDCAz = accCuts->GetMaxDCAz();
1269 Int_t minTPCClust = trackCuts->GetMinNClusterTPC();
1270
0aaa8b91 1271 //
1272 Int_t ntracks = esdEvent->GetNumberOfTracks();
1273 TVectorD ztrack(ntracks);
0aaa8b91 1274 Double_t dca[2],cov[3];
1275 Int_t counter=0;
1276 for (Int_t i=0;i <ntracks; i++){
1277 AliESDtrack *t = esdEvent->GetTrack(i);
1278 if (!t) continue;
1279 if (!t->GetTPCInnerParam()) continue;
bad4ba69 1280 if (t->GetTPCNcls()<minTPCClust) continue;
0aaa8b91 1281 //
774986ef 1282
1283 Double_t x[3]; t->GetXYZ(x);
1284 Double_t b[3]; AliTracker::GetBxByBz(x,b);
1285 const Double_t kMaxStep = 1; //max step over the material
1286
0aaa8b91 1287 AliExternalTrackParam *tpcTrack = new AliExternalTrackParam(*(t->GetTPCInnerParam()));
774986ef 1288 if (!tpcTrack->PropagateToDCABxByBz(&vtx0,b,kMaxStep,dca,cov)) continue;
0aaa8b91 1289
1290 //
bad4ba69 1291 if (TMath::Abs(dca[0])>maxDCAr) continue;
1292 //if (TMath::Sqrt(cov[0])>sigmaXYcut) continue;
1293 if (TMath::Abs(tpcTrack->GetZ())>maxDCAz) continue;
0aaa8b91 1294
0aaa8b91 1295 ztrack[counter]=tpcTrack->GetZ();
1296 counter++;
1297
1298 if(tpcTrack) delete tpcTrack;
1299 }
bad4ba69 1300
0aaa8b91 1301 //
1302 // Find LTM z position
1303 //
1304 Double_t mean=0, sigma=0;
1305 if (counter<ntracksMin) return 0;
1306 //
1307 Int_t nused = TMath::Nint(counter*fraction);
1308 if (nused==counter) nused=counter-1;
1309 if (nused>1){
1310 AliMathBase::EvaluateUni(counter, ztrack.GetMatrixArray(), mean,sigma, TMath::Nint(counter*fraction));
1311 sigma/=TMath::Sqrt(nused);
1312 }else{
1313 mean = TMath::Mean(counter, ztrack.GetMatrixArray());
1314 sigma = TMath::RMS(counter, ztrack.GetMatrixArray());
1315 sigma/=TMath::Sqrt(counter-1);
1316 }
1317 vtxpos[2]=mean;
1318 vtxsigma[2]=sigma;
1319 const AliESDVertex* vertex = new AliESDVertex(vtxpos, vtxsigma);
1320 return vertex;
1321}
1322
1323//_____________________________________________________________________________
f2dec884 1324Int_t AlidNdPtHelper::GetSPDMBTrackMult(AliESDEvent* const esdEvent, Float_t deltaThetaCut, Float_t deltaPhiCut)
0aaa8b91 1325{
1326 //
1327 // SPD track multiplicity
1328 //
1329
1330 // get tracklets
1331 const AliMultiplicity* mult = esdEvent->GetMultiplicity();
1332 if (!mult)
1333 return 0;
1334
1335 // get multiplicity from SPD tracklets
1336 Int_t inputCount = 0;
1337 for (Int_t i=0; i<mult->GetNumberOfTracklets(); ++i)
1338 {
1339 //printf("%d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), mult->GetDeltaPhi(i));
1340
1341 Float_t phi = mult->GetPhi(i);
1342 if (phi < 0)
1343 phi += TMath::Pi() * 2;
1344 Float_t deltaPhi = mult->GetDeltaPhi(i);
1345 Float_t deltaTheta = mult->GetDeltaTheta(i);
1346
1347 if (TMath::Abs(deltaPhi) > 1)
1348 printf("WARNING: Very high Delta Phi: %d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), deltaPhi);
1349
1350 if (deltaThetaCut > 0. && TMath::Abs(deltaTheta) > deltaThetaCut)
1351 continue;
1352
1353 if (deltaPhiCut > 0. && TMath::Abs(deltaPhi) > deltaPhiCut)
1354 continue;
1355
1356 ++inputCount;
1357 }
1358
1359return inputCount;
1360}
1361
1362//_____________________________________________________________________________
f2dec884 1363Int_t AlidNdPtHelper::GetSPDMBPrimTrackMult(AliESDEvent* const esdEvent, AliStack* const stack, Float_t deltaThetaCut, Float_t deltaPhiCut)
0aaa8b91 1364{
1365 //
1366 // SPD track multiplicity
1367 //
1368
1369 // get tracklets
1370 const AliMultiplicity* mult = esdEvent->GetMultiplicity();
1371 if (!mult)
1372 return 0;
1373
1374 // get multiplicity from SPD tracklets
1375 Int_t inputCount = 0;
1376 for (Int_t i=0; i<mult->GetNumberOfTracklets(); ++i)
1377 {
1378 //printf("%d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), mult->GetDeltaPhi(i));
1379
1380 Float_t phi = mult->GetPhi(i);
1381 if (phi < 0)
1382 phi += TMath::Pi() * 2;
1383 Float_t deltaPhi = mult->GetDeltaPhi(i);
1384 Float_t deltaTheta = mult->GetDeltaTheta(i);
1385
1386 if (TMath::Abs(deltaPhi) > 1)
1387 printf("WARNING: Very high Delta Phi: %d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), deltaPhi);
1388
1389 if (deltaThetaCut > 0. && TMath::Abs(deltaTheta) > deltaThetaCut)
1390 continue;
1391
1392 if (deltaPhiCut > 0. && TMath::Abs(deltaPhi) > deltaPhiCut)
1393 continue;
1394
1395
1396 if (mult->GetLabel(i, 0) < 0 || mult->GetLabel(i, 0) != mult->GetLabel(i, 1) ||
1397 !stack->IsPhysicalPrimary(mult->GetLabel(i, 0)))
1398 continue;
1399
1400
1401 ++inputCount;
1402 }
1403
1404return inputCount;
1405}
1406
1407