PWGLF/SPECTRA/PiKaPr/TPCTOF/AliAnalysisCombinedHadronSpectra.cxx

   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   *
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   9  * without fee, proviyaded 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 purapose. It is         *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 ///////////////////////////////////////////////////////////////////////////
  17 //                                                                       //
  18 //                                                                       //
  19 // Analysis for identified charged hadron spectra.                       //
  20 //                                                                       //
  21 //                                                                       //
  22 ///////////////////////////////////////////////////////////////////////////
  23
  24 #include "Riostream.h"
  25 #include "TChain.h"
  26 #include "TTree.h"
  27 #include "TH1F.h"
  28 #include "TH2D.h"
  29 #include "TH3F.h"
  30 #include "TList.h"
  31 #include "TMath.h"
  32 #include "TCanvas.h"
  33 #include "TObjArray.h"
  34 #include "TF1.h"
  35 #include "TFile.h"
  36
  37 #include "AliAnalysisTaskSE.h"
  38 #include "AliAnalysisManager.h"
  39
  40 #include "AliHeader.h"
  41 #include "AliGenPythiaEventHeader.h"
  42 #include "AliGenCocktailEventHeader.h"
  43
  44 #include "AliPID.h"
  45 #include "AliESDtrackCuts.h"
  46 #include "AliESDVertex.h"
  47 #include "AliESDEvent.h"
  48 #include "AliESDInputHandler.h"
  49 #include "AliESDtrack.h"
  50 #include "AliESDpid.h"
  51 #include "AliCentrality.h"
  52 #include "AliESDUtils.h"
  53 #include "AliMultiplicity.h"
  54
  55 #include "AliMCEventHandler.h"
  56 #include "AliMCEvent.h"
  57 #include "AliStack.h"
  58
  59 #include "AliLog.h"
  60
  61 #include "AliAnalysisCombinedHadronSpectra.h"
  62
  63
  64 ClassImp(AliAnalysisCombinedHadronSpectra)
  65
  66 //________________________________________________________________________
  67 AliAnalysisCombinedHadronSpectra::AliAnalysisCombinedHadronSpectra()
  68   : AliAnalysisTaskSE("TaskChargedHadron"), fESD(0), fListHist(0), fESDtrackCuts(0),fESDTrackCutsMult(0),fESDpid(0),
  69     fMCtrue(0),
  70     fOnlyQA(0),
  71     fUseHBTmultiplicity(0),
  72     fUseTPConlyTracks(0),
  73     fSaveMotherPDG(0),
  74     fAlephParameters(),
  75     fHistRealTracks(0),
  76     fHistMCparticles(0),
  77     fHistPidQA(0),
  78     fHistMult(0),
  79     fHistCentrality(0)
  80 {
  81   // default Constructor
  82   /* fast compilation test
  83      gSystem->Load("libANALYSIS");
  84      gSystem->Load("libANALYSISalice");
  85      .L /d/alice09/akalweit/train/trunk/akalweit_hadronSpectra/AliAnalysisCombinedHadronSpectra.cxx++
  86    */
  87 }
  88
  89
  90 //________________________________________________________________________
  91 AliAnalysisCombinedHadronSpectra::AliAnalysisCombinedHadronSpectra(const char *name)
  92   : AliAnalysisTaskSE(name), fESD(0), fListHist(0), fESDtrackCuts(0),fESDTrackCutsMult(0),fESDpid(0),
  93     fMCtrue(0),
  94     fOnlyQA(0),
  95     fUseHBTmultiplicity(0),
  96     fUseTPConlyTracks(0),
  97     fSaveMotherPDG(0),
  98     fAlephParameters(),
  99     fHistRealTracks(0),
 100     fHistMCparticles(0),
 101     fHistPidQA(0),
 102     fHistMult(0),
 103     fHistCentrality(0)
 104 {
 105   //
 106   // standard constructur which should be used
 107   //
 108   Printf("*** CONSTRUCTOR CALLED ****");
 109   //
 110   fMCtrue = kTRUE;
 111   fOnlyQA = kFALSE;
 112   fUseHBTmultiplicity = kTRUE;
 113   fUseTPConlyTracks = kFALSE;
 114   /* real */
 115   fAlephParameters[0] = 0.0283086;
 116   fAlephParameters[1] = 2.63394e+01;
 117   fAlephParameters[2] = 5.04114e-11;
 118   fAlephParameters[3] = 2.12543e+00;
 119   fAlephParameters[4] = 4.88663e+00;
 120   //
 121   // initialize PID object
 122   //
 123   //fESDpid = new AliESDpid();
 124   //
 125   // create track cuts
 126   //
 127   fESDtrackCuts = new AliESDtrackCuts("AliESDtrackCuts","AliESDtrackCuts");
 128   //
 129   //Initialize();
 130   // Output slot #0 writes into a TList container
 131   DefineOutput(1, TList::Class());
 132
 133 }
 134
 135
 136 //________________________________________________________________________
 137 void AliAnalysisCombinedHadronSpectra::Initialize()
 138 {
 139   //
 140   // updating parameters in case of changes
 141   //
 142   // 1. pid parameters
 143   //
 144   //fESDpid->GetTPCResponse().SetBetheBlochParameters(fAlephParameters[0],fAlephParameters[1],fAlephParameters[2],fAlephParameters[3],fAlephParameters[4]);
 145   //
 146   // 2. track cuts
 147   //
 148   /*
 149   fESDtrackCuts->SetMaxCovDiagonalElements(2, 2, 0.5, 0.5, 2);  // BEWARE STANDARD VALUES ARE: 2, 2, 0.5, 0.5, 2
 150   fESDtrackCuts->SetMaxNsigmaToVertex(3);
 151   fESDtrackCuts->SetRequireSigmaToVertex(kTRUE);
 152   fESDtrackCuts->SetAcceptKinkDaughters(kFALSE);
 153   fESDtrackCuts->SetMinNClustersTPC(70);
 154   fESDtrackCuts->SetMaxChi2PerClusterTPC(4);
 155   fESDtrackCuts->SetMaxDCAToVertexXY(3);
 156   fESDtrackCuts->SetMaxDCAToVertexZ(3);
 157   fESDtrackCuts->SetRequireTPCRefit(kTRUE);
 158   fESDtrackCuts->SetRequireITSRefit(kTRUE);
 159   fESDtrackCuts->SetClusterRequirementITS(AliESDtrackCuts::kSPD, AliESDtrackCuts::kAny); //TEMPORARY <-> REMOVE
 160   fESDtrackCuts->SetMinNClustersITS(3);
 161   */
 162   //fESDtrackCuts = AliESDtrackCuts::GetStandardITSTPCTrackCuts2010(kTRUE); // kTRUE = sel. primaries --> patch for the moment, do TFractionFitter later
 163
 164
 165   if (!fUseTPConlyTracks) {
 166           fESDtrackCuts = AliESDtrackCuts::GetStandardITSTPCTrackCuts2010(kFALSE);
 167           fESDtrackCuts->SetMaxDCAToVertexXY(3);
 168           fESDtrackCuts->SetMaxDCAToVertexZ(2);
 169           fESDtrackCuts->SetEtaRange(-0.9,0.9);
 170   }
 171   else {
 172           //fESDtrackCuts = AliESDtrackCuts::GetStandardTPCOnlyTrackCuts();
 173           fESDtrackCuts->SetMinNClustersTPC(70);
 174           fESDtrackCuts->SetMaxChi2PerClusterTPC(4);
 175           fESDtrackCuts->SetAcceptKinkDaughters(kFALSE);
 176           fESDtrackCuts->SetRequireTPCRefit(kFALSE);
 177
 178           fESDtrackCuts->SetMaxDCAToVertexXY(15);
 179           fESDtrackCuts->SetMaxDCAToVertexZ(6);
 180           fESDtrackCuts->SetDCAToVertex2D(kFALSE);
 181           fESDtrackCuts->SetRequireSigmaToVertex(kFALSE);
 182
 183           fESDtrackCuts->SetEtaRange(-0.9,0.9);
 184   }
 185   //
 186   //
 187   //
 188   //
 189   fESDTrackCutsMult = AliESDtrackCuts::GetStandardITSTPCTrackCuts2010(kTRUE);
 190   fESDTrackCutsMult->SetEtaRange(-1.2,+1.2);
 191   fESDTrackCutsMult->SetPtRange(0.15,1e10);
 192
 193 }
 194
 195
 196 //________________________________________________________________________
 197 void AliAnalysisCombinedHadronSpectra::UserCreateOutputObjects()
 198 {
 199   // Create histograms
 200   // Called once
 201   fListHist = new TList();
 202   fListHist->SetOwner(kTRUE);
 203   //
 204   const Int_t kPtBins = 35;
 205   const Int_t kMultBins = 11;
 206   const Int_t kDcaBins = 76;
 207   const Float_t kDcaBinsTPConlyFactor = 5; //need to change binning of DCA plot for tpconly
 208   // sort pT-bins ..
 209   Double_t binsPt[kPtBins+1] = {0., 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0};
 210
 211   Double_t binsDca[kDcaBins+1] =  {-3,-2.85,-2.7,-2.55,-2.4,-2.25,-2.1,-1.95,-1.8,-1.65,-1.5,-1.35,-1.2,-1.05,-0.9,-0.75,-0.6,-0.45,-0.3,-0.285,-0.27,-0.255,-0.24,-0.225,-0.21,-0.195,-0.18,-0.165,-0.15,-0.135,-0.12,-0.105,-0.09,-0.075,-0.06,-0.045,-0.03,-0.015,0,0.015,0.03,0.045,0.06,0.075,0.09,0.105,0.12,0.135,0.15,0.165,0.18,0.195,0.21,0.225,0.24,0.255,0.27,0.285,0.3,0.45,0.6,0.75,0.9,1.05,1.2,1.35,1.5,1.65,1.8,1.95,2.1,2.25,2.4,2.55,2.7,2.85,3};
 212
 213   // DCA bins borders get multiplied by constant factor for TPConlyTracks
 214   Double_t binsDcaTPConly[kDcaBins+1];
 215   for (Int_t i = 0; i< kDcaBins+1; i++) {
 216         binsDcaTPConly[i] = kDcaBinsTPConlyFactor * binsDca[i];
 217   }
 218
 219   //
 220   // create the histograms with all necessary information --> it is filled 4x for each particle assumption
 221   //
 222   // (0.) assumed particle: 0. pion, 1. kaon, 2. proton, 3. deuteron
 223   // (1.) multiplicity or centrality -- number of accepted ESD tracks per events (deprecated), but now classes from 1 to 10, 0: Min. Bias
 224   // (2.) pT
 225   // (3.) sign
 226   // (4.) rapidity --> filled 4x
 227   // (5.)  pull TPC dEx --> filled 4x
 228   // (6.) has valid TOF pid signal
 229   // (7.) nsigma TOF --> filled 4x
 230   // (8..) dca_xy
 231   // (9.) CODE -- only MC 0-generated, 1-true rec. primaries, 2-misident prim, 3-second weak, 4-second material, 5-misident sec, 6-sec. K0, 7-sec. lambda, 8-sec sigma+
 232   //
 233   //                              0,           1,           2,  3,       4,   5,    6,   7,       8
 234   Int_t    binsHistReal[9] = {   3,   kMultBins,     kPtBins,  2,      10,   50,    2,  80, kDcaBins};
 235   Double_t xminHistReal[9] = {-0.5,        -0.5,           0, -2,    -0.5,   -5,- 0.5,  -8,       -3};
 236   Double_t xmaxHistReal[9] = { 2.5,        10.5,           3,  2,     0.5,    5,  1.5,   8,        3};
 237   fHistRealTracks = new THnSparseF("fHistRealTracks","real tracks",9,binsHistReal,xminHistReal,xmaxHistReal);
 238   //
 239   fHistRealTracks->GetAxis(2)->Set(kPtBins, binsPt);
 240
 241   //different DCAxy binning for TPConlyTracks
 242   if (!fUseTPConlyTracks) fHistRealTracks->GetAxis(8)->Set(kDcaBins, binsDca);
 243   else  fHistRealTracks->GetAxis(8)->Set(kDcaBins, binsDcaTPConly);
 244   fListHist->Add(fHistRealTracks);
 245   //
 246   //                      0.ptot,1.tpcSig,2.hasTOF, 3. assumed part., 4. nclDedx, 5. nSigmaTPC (4x), 6. nSigmaTOF (4x), 7. centrality
 247   fHistPidQA = new TH3D("fHistPidQA","PID QA",500,0.1,10,1000,0,1000,2,-2,2);
 248   BinLogAxis(fHistPidQA);
 249   fListHist->Add(fHistPidQA);
 250
 251   //                            0,            1,           2,  3,      4,   5,    6,   7,        8,    9
 252   Int_t    binsHistMC[10] = {   3,    kMultBins,     kPtBins,  2,     10,  50,    2,  80, kDcaBins,    6};
 253   Double_t xminHistMC[10] = {-0.5,         -0.5,           0, -2,   -0.5,  -5,- 0.5,  -8,       -3, -0.5};
 254   Double_t xmaxHistMC[10] = { 2.5,         10.5,           3,  2,    0.5,   5,  1.5,   8,        3,  5.5};
 255
 256   //different binning for CODE axis, if we want to save motherPDG
 257   if (fSaveMotherPDG) {
 258     binsHistMC[9] = 9;
 259     xmaxHistMC[9] = 8.5;
 260   }
 261
 262   fHistMCparticles = new THnSparseF("fHistMCparticles","MC histogram",10,binsHistMC,xminHistMC,xmaxHistMC);
 263   fHistMCparticles->GetAxis(2)->Set(kPtBins, binsPt);
 264
 265   //different DCAxy binning for TPConlyTracks
 266   if (!fUseTPConlyTracks) fHistMCparticles->GetAxis(8)->Set(kDcaBins, binsDca);
 267   else fHistMCparticles->GetAxis(8)->Set(kDcaBins, binsDcaTPConly);
 268
 269   fListHist->Add(fHistMCparticles);
 270   //
 271   fHistMult = new TH2D("fHistMult", "control histogram to count number of events", 502, -2.5, 499.5,4,-0.5,3.5);
 272   fHistCentrality = new TH1D("fHistCentrality", "control histogram to count number of events", 22, -1.5, 20.5);
 273   fListHist->Add(fHistMult);
 274   fListHist->Add(fHistCentrality);
 275
 276 }
 277
 278 //________________________________________________________________________
 279 void AliAnalysisCombinedHadronSpectra::UserExec(Option_t *)
 280 {
 281   //
 282   // main event loop
 283   //
 284   if (!fESDpid) fESDpid = ((AliESDInputHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->GetESDpid();
 285   if (!fESDpid) {
 286     fESDpid = new AliESDpid(); // HACK FOR MC PBPB --> PLEASE REMOVE AS SOON AS POSSIBLE
 287     fESDpid->GetTPCResponse().SetBetheBlochParameters(1.28778e+00/50., 3.13539e+01, TMath::Exp(-3.16327e+01), 1.87901e+00, 6.41583e+00);
 288   }
 289   //AliLog::SetGlobalLogLevel(AliLog::kError);
 290   //
 291   // Check Monte Carlo information and other access first:
 292   //
 293   AliMCEventHandler* eventHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
 294   if (!eventHandler) {
 295     //Printf("ERROR: Could not retrieve MC event handler");
 296     fMCtrue = kFALSE;
 297   }
 298   //
 299   AliMCEvent* mcEvent = 0x0;
 300   AliStack* stack = 0x0;
 301   if (eventHandler) mcEvent = eventHandler->MCEvent();
 302   if (!mcEvent) {
 303     //Printf("ERROR: Could not retrieve MC event");
 304     if (fMCtrue) return;
 305   }
 306   if (fMCtrue) {
 307     stack = mcEvent->Stack();
 308     if (!stack) return;
 309   }
 310   //
 311   fESD = dynamic_cast<AliESDEvent*>( InputEvent() );
 312   if (!fESD) {
 313     //Printf("ERROR: fESD not available");
 314     return;
 315   }
 316
 317   if (!fESDtrackCuts) {
 318     Printf("ERROR: fESDtrackCuts not available");
 319     return;
 320   }
 321   //
 322   // check if event is selected by physics selection class
 323   //
 324   Bool_t isSelected = kTRUE; // for reasons of backward compatibility --> check is now in AddTask macro
 325   /*
 326   Bool_t isSelected = kFALSE;
 327   isSelected = (((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected() & AliVEvent::kMB) == AliVEvent::kMB;
 328   */
 329   //
 330   // monitor vertex position
 331   //
 332   const AliESDVertex *vertex = fESD->GetPrimaryVertexTracks();
 333   if(vertex->GetNContributors()<1) {
 334     // SPD vertex
 335     vertex = fESD->GetPrimaryVertexSPD();
 336     if(vertex->GetNContributors()<1) vertex = 0x0;
 337   }
 338   //
 339   // small track loop to determine trigger Pt, multiplicity or centrality
 340   //
 341   Double_t triggerPt = 0;
 342   for (Int_t i=0;i<fESD->GetNumberOfTracks();++i) {
 343     AliESDtrack *track =fESD->GetTrack(i);
 344     if (!fESDTrackCutsMult->AcceptTrack(track)) continue;
 345     if (track->Pt() > triggerPt) triggerPt = track->Pt();
 346   }
 347   Int_t trackCounter = fESDTrackCutsMult->CountAcceptedTracks(fESD);
 348   //
 349   // 2nd multiplicity estimator SPD hits; replaces multiplicity from HBT
 350   //
 351   Float_t spdCorr = -1;
 352   const AliMultiplicity *mult = fESD->GetMultiplicity();
 353   Float_t nClusters[6]={0.0,0.0,0.0,0.0,0.0,0.0};
 354   for(Int_t ilay=0; ilay<6; ilay++) nClusters[ilay] = (Float_t)mult->GetNumberOfITSClusters(ilay);
 355   if (vertex) spdCorr = AliESDUtils::GetCorrSPD2(nClusters[1],vertex->GetZ());
 356   //
 357   Float_t centrality = -1;
 358   //
 359   // IMPORTANT CENTRALITY DEFINITION FOR pp
 360   //
 361   if (!fUseHBTmultiplicity) {
 362     // test binning to check if multiplicity-dependence is due to diffractive events being s
 363     if (trackCounter >= 0  && trackCounter <= 0)  centrality = 0;
 364     if (trackCounter >= 1  && trackCounter <= 1)  centrality = 1;
 365     if (trackCounter >= 2  && trackCounter <= 2)  centrality = 2;
 366     if (trackCounter >= 3  && trackCounter <= 3)  centrality = 3;
 367     if (trackCounter >= 4  && trackCounter <= 4)  centrality = 4;
 368     if (trackCounter >= 5  && trackCounter <= 5)  centrality = 5;
 369     // this was all the original bin 1 being [0..5]
 370     if (trackCounter >= 6  && trackCounter <= 9)  centrality = 6;
 371     if (trackCounter >= 10 && trackCounter <= 14) centrality = 7;
 372     if (trackCounter >= 15 && trackCounter <= 22) centrality = 8;
 373     if (trackCounter >= 23 && trackCounter <= 32) centrality = 9;
 374     if (trackCounter >= 33 && trackCounter <= 42) centrality = 10;
 375     /*
 376     if (trackCounter >= 43 && trackCounter <= 52) centrality = 7
 377     if (trackCounter >= 53 && trackCounter <= 62) centrality = 8;
 378     if (trackCounter >= 63 && trackCounter <= 72) centrality = 9;
 379     if (trackCounter >= 73 && trackCounter <= 82) centrality = 10;
 380     */
 381   } else {
 382     if (spdCorr >= 0  && spdCorr <=  2)  centrality  = 0;
 383     if (spdCorr >= 3  && spdCorr <=  5)  centrality  = 1;
 384     if (spdCorr >= 6  && spdCorr <=  8)  centrality  = 2;
 385     if (spdCorr >= 9  && spdCorr <= 11)  centrality  = 3;
 386     if (spdCorr >= 12 && spdCorr <= 14)  centrality  = 4;
 387     if (spdCorr >= 15 && spdCorr <= 16)  centrality  = 5;
 388     // this was all the original bin 1 being [0..16]
 389     if (spdCorr >= 17 && spdCorr <= 30)  centrality =  6;
 390     if (spdCorr >= 31 && spdCorr <= 45)  centrality =  7;
 391     if (spdCorr >= 46 && spdCorr <= 68)  centrality =  8;
 392     if (spdCorr >= 69 && spdCorr <= 97)  centrality =  9;
 393     if (spdCorr >= 98)                   centrality = 10;
 394     /*
 395     if (spdCorr >= 17 && spdCorr <= 30)  centrality = 2;
 396     if (spdCorr >= 31 && spdCorr <= 45)  centrality = 3;
 397     if (spdCorr >= 46 && spdCorr <= 68)  centrality = 4;
 398     if (spdCorr >= 69 && spdCorr <= 97)  centrality = 5;
 399     if (spdCorr >= 98)                   centrality = 6;
 400     */
 401   }
 402   //
 403   Int_t rootS = fESD->GetBeamEnergy() < 1000 ? 0 : 1;
 404   if (fESD->GetEventSpecie() == 4) { // PbPb
 405     rootS = 2;
 406     AliCentrality *esdCentrality = fESD->GetCentrality();
 407     centrality = esdCentrality->GetCentralityClass10("V0M") + 1; // centrality percentile determined with V0
 408     if (TMath::Abs(centrality - 1) < 1e-5) {
 409       centrality = esdCentrality->GetCentralityClass5("V0M");
 410     }
 411   }
 412   Int_t nContributors = 0;
 413   if (fESD->GetPrimaryVertexTPC()) nContributors = fESD->GetPrimaryVertexTPC()->GetNContributors();
 414   //
 415   Int_t processtype = 0;
 416   Int_t processCode = 0;
 417   //
 418   // important change: fill generated only after vertex cut in case of heavy-ions
 419   //
 420   if (!vertex && fESD->GetEventSpecie() == 4) {
 421     fHistMult->Fill(-1, processCode);
 422     PostData(1, fListHist);
 423     return;
 424   } else {
 425     if (TMath::Abs(vertex->GetZv()) > 10 && fESD->GetEventSpecie() == 4) {
 426       fHistMult->Fill(-1, processCode);
 427       PostData(1, fListHist);
 428       return;
 429     }
 430   }
 431   //
 432   if (fMCtrue) {
 433     //
 434     //
 435     //
 436     AliHeader * header = mcEvent->Header();
 437     processtype = GetPythiaEventProcessType(header);
 438     // non diffractive
 439     if (processtype !=92 && processtype !=93 && processtype != 94) processCode = 1;
 440     // single diffractive
 441     if ((processtype == 92 || processtype == 93)) processCode = 2;
 442     // double diffractive
 443     if (processtype == 94) processCode = 3;
 444     //
 445     for(Int_t i = 0; i < stack->GetNtrack(); i++) {
 446       TParticle * trackMC = stack->Particle(i);
 447       Int_t pdg = trackMC->GetPdgCode();
 448       //
 449       Double_t xv = trackMC->Vx();
 450       Double_t yv = trackMC->Vy();
 451       Double_t zv = trackMC->Vz();
 452       Double_t dxy = 0;
 453       dxy = TMath::Sqrt(xv*xv + yv*yv); // so stupid to avoid warnings
 454       Double_t dz = 0;
 455       dz = TMath::Abs(zv); // so stupid to avoid warnings
 456       //
 457       // vertex cut - selection of primaries
 458       //
 459       //if (dxy > 3 || dz > 10) continue; // fixed cut at 3cm in r
 460       //
 461       if (!stack->IsPhysicalPrimary(i)) continue;
 462       //
 463       // fill MC histograms here...
 464       //
 465       Double_t rap = trackMC->Y();
 466       Double_t pT  = trackMC->Pt();
 467       Int_t sign = pdg < 0 ? -1 : 1; // only works for charged pi,K,p !!
 468 //      Double_t transMass = TMath::Sqrt(trackMC->Pt()*trackMC->Pt() + trackMC->GetMass()*trackMC->GetMass()) - trackMC->GetMass();
 469       //
 470       Int_t iPart = -1;
 471       if (TMath::Abs(pdg) == 211)  iPart = 0; // select Pi+/Pi- only
 472       if (TMath::Abs(pdg) == 321)  iPart = 1; // select K+/K- only
 473       if (TMath::Abs(pdg) == 2212) iPart = 2; // select p+/p- only
 474       if (iPart == -1) continue;
 475       //
 476       Double_t vecHistMC[10] = {iPart, centrality,  pT, sign, rap, 0, 1, 0, dxy, 0};
 477       if (!fOnlyQA) fHistMCparticles->Fill(vecHistMC);
 478     }
 479   }
 480   //
 481   if (!isSelected && !fOnlyQA) {
 482     PostData(1, fListHist);
 483     return;
 484   }
 485   //
 486   if (!vertex) {
 487     fHistMult->Fill(-1, processCode);
 488     PostData(1, fListHist);
 489     return;
 490   } else {
 491     if (TMath::Abs(vertex->GetZv()) > 10) {
 492       fHistMult->Fill(-1, processCode);
 493       PostData(1, fListHist);
 494       return;
 495     }
 496   }
 497   //
 498   // count events after physics selection and after vertex selection
 499   //
 500   //cout << "MULTIPLICITY " << trackCounter << " " << fESD->GetEventNumberInFile() <<endl;
 501   fHistMult->Fill(trackCounter, processCode);
 502   fHistCentrality->Fill(centrality);
 503
 504
 505   //***************************************************
 506   // track loop
 507   //***************************************************
 508   //const Float_t kNsigmaCut = 3;
 509   //const Float_t k2sigmaCorr = 1/(0.5*(TMath::Erf(kNsigmaCut/sqrt(2))-TMath::Erf(-kNsigmaCut/sqrt(2))))/*1/0.9545*/;
 510   //
 511   Float_t dca[2], cov[3]; // dca_xy, dca_z, sigma_xy, sigma_xy_z, sigma_z for the vertex cut
 512   //
 513   for (Int_t i=0;i<fESD->GetNumberOfTracks();++i) {
 514
 515         AliESDtrack *track = 0;
 516     AliESDtrack *trackForTOF = 0; //normal track for all TOF information needed when using tpconly-tracks
 517
 518         //normal tracks, if tpconly flag is set, use tpconlytracks
 519         if (!fUseTPConlyTracks){
 520         track =fESD->GetTrack(i);
 521         }
 522         else {
 523                 track = fESDtrackCuts->GetTPCOnlyTrack(fESD,i);
 524                 if (!track) continue;
 525                 trackForTOF = fESD->GetTrack(i);
 526         }
 527     //
 528     if (!track->GetInnerParam()) {
 529                 if (fUseTPConlyTracks) {delete track; track = 0;} //need to delete tpconlytrack
 530                 continue;
 531         }
 532     Double_t ptot = track->GetInnerParam()->GetP(); // momentum for dEdx determination
 533     Double_t pT = track->Pt();
 534     track->GetImpactParameters(dca, cov);
 535     //
 536     //
 537     // cut for dead regions in the detector
 538     // if (track->Eta() > 0.1 && (track->Eta() < 0.2 && track->Phi() > 0.1 && track->Phi() < 0.1) continue;
 539     //
 540     // 2.a) apply some standard track cuts according to general recommendations
 541     //
 542     if (!fESDtrackCuts->AcceptTrack(track)) {
 543                 if (fUseTPConlyTracks) {delete track; track = 0;} //need to delete tpconlytrack
 544                 continue;
 545         }
 546
 547         UInt_t status = 0;
 548     if (!fUseTPConlyTracks) status = track->GetStatus();
 549         else status = trackForTOF->GetStatus();
 550     Bool_t hasTOFout  = status&AliESDtrack::kTOFout;
 551     Bool_t hasTOFtime = status&AliESDtrack::kTIME;
 552     Bool_t hasTOFpid  = status&AliESDtrack::kTOFpid;
 553     Bool_t hasTOF     = kFALSE;
 554     if (hasTOFout && hasTOFtime && hasTOFpid) hasTOF = kTRUE;
 555         Float_t length = 0.;
 556     if (!fUseTPConlyTracks) length = track->GetIntegratedLength();
 557     else length = trackForTOF->GetIntegratedLength();
 558
 559     if (length < 350.) hasTOF = kFALSE;
 560     //
 561     // calculate rapidities and kinematics
 562     //
 563     //
 564     Double_t pvec[3];
 565     track->GetPxPyPz(pvec);
 566     Double_t energyPion = TMath::Sqrt(track->GetP()*track->GetP() + AliPID::ParticleMass(AliPID::kPion)*AliPID::ParticleMass(AliPID::kPion));
 567     Double_t energyKaon = TMath::Sqrt(track->GetP()*track->GetP() + AliPID::ParticleMass(AliPID::kKaon)*AliPID::ParticleMass(AliPID::kKaon));
 568     Double_t energyProton = TMath::Sqrt(track->GetP()*track->GetP() + AliPID::ParticleMass(AliPID::kProton)*AliPID::ParticleMass(AliPID::kProton));
 569     Double_t energyDeuteron = TMath::Sqrt(track->GetP()*track->GetP() + 4*AliPID::ParticleMass(AliPID::kProton)*AliPID::ParticleMass(AliPID::kProton));
 570     //
 571     Double_t rapPion = 0.5*TMath::Log((energyPion + pvec[2])/(energyPion - pvec[2]));
 572     Double_t rapKaon = 0.5*TMath::Log((energyKaon + pvec[2])/(energyKaon - pvec[2]));
 573     Double_t rapProton = 0.5*TMath::Log((energyProton + pvec[2])/(energyProton - pvec[2]));
 574     Double_t rapDeuteron = 0.5*TMath::Log((energyDeuteron + pvec[2])/(energyDeuteron - pvec[2]));
 575     //
 576 //    Double_t transMassPion = TMath::Sqrt(track->Pt()*track->Pt() + AliPID::ParticleMass(AliPID::kPion)*AliPID::ParticleMass(AliPID::kPion))      -  AliPID::ParticleMass(AliPID::kPion);
 577 //    Double_t transMassKaon = TMath::Sqrt(track->Pt()*track->Pt() + AliPID::ParticleMass(AliPID::kKaon)*AliPID::ParticleMass(AliPID::kKaon))     -  AliPID::ParticleMass(AliPID::kKaon);
 578  //   Double_t transMassProton = TMath::Sqrt(track->Pt()*track->Pt() + AliPID::ParticleMass(AliPID::kProton)*AliPID::ParticleMass(AliPID::kProton))    -  AliPID::ParticleMass(AliPID::kProton);
 579 //    Double_t transMassDeuteron = TMath::Sqrt(track->Pt()*track->Pt() + 4*AliPID::ParticleMass(AliPID::kProton)*AliPID::ParticleMass(AliPID::kProton))    -  2*AliPID::ParticleMass(AliPID::kProton);
 580     //
 581     // 3. make the PID
 582     //
 583     Double_t sign = track->GetSign();
 584     Double_t tpcSignal = track->GetTPCsignal();
 585     //
 586     //
 587     // 3.a. calculate expected signals in nsigma
 588     //
 589     //
 590     // (0.) assumed particle: 0. pion, 1. kaon, 2. proton, 3. deuteron
 591     // (1.) multiplicity or centrality -- number of accepted ESD tracks per events (deprecated), but now classes from 1 to 10, 0: Min. Bias
 592     // (2.) pT
 593     // (3.) sign
 594     // (4.) rapidity --> filled 4x
 595     // (5.)  pull TPC dEx --> filled 4x
 596     // (6.) has valid TOF pid signal
 597     // (7.) nsigma TOF --> filled 4x
 598     // (8..) dca_xy
 599     // (9.) CODE -- only MC 0-generated, 1-true rec. primaries, 2-misident, 3-second weak, 4-second material
 600     //
 601 //    Double_t transMass[4] = {transMassPion,transMassKaon,transMassProton,transMassDeuteron};
 602     Double_t rap[4] = {rapPion,rapKaon,rapProton,rapDeuteron};
 603     Double_t pullsTPC[4] = {fESDpid->NumberOfSigmasTPC(track,AliPID::kPion),
 604                             fESDpid->NumberOfSigmasTPC(track,AliPID::kKaon),
 605                             fESDpid->NumberOfSigmasTPC(track,AliPID::kProton),
 606                             0}; // ASK FOR PUTTING THE DEUTERON TO AliPID !!!!!!!!!!!!!!
 607     Float_t time0 = fESDpid->GetTOFResponse().GetTimeZero();
 608     //fESDpid->GetTOFResponse().SetTimeResolution(130.);
 609     Double_t pullsTOF[4] ={0.,0.,0.,0.};
 610     if (!fUseTPConlyTracks) {
 611                          pullsTOF[0] = fESDpid->NumberOfSigmasTOF(track,AliPID::kPion, time0);
 612                              pullsTOF[1] = fESDpid->NumberOfSigmasTOF(track,AliPID::kKaon, time0);
 613                              pullsTOF[2] = fESDpid->NumberOfSigmasTOF(track,AliPID::kProton, time0);
 614                              pullsTOF[3] = 0; // ASK FOR PUTTING THE DEUTERON TO AliPID !!!!!!!!!!!!!!;
 615         }
 616         else {
 617                          pullsTOF[0] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kPion, time0);
 618                              pullsTOF[1] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kKaon, time0);
 619                              pullsTOF[2] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kProton, time0);
 620                              pullsTOF[3] = 0; // ASK FOR PUTTING THE DEUTERON TO AliPID !!!!!!!!!!!!!!;
 621         }
 622
 623     //
 624 //    Double_t tpcQA[4] = {fESDpid->NumberOfSigmasTPC(track,AliPID::kElectron),
 625 //                       fESDpid->NumberOfSigmasTPC(track,AliPID::kPion),
 626 //                       fESDpid->NumberOfSigmasTPC(track,AliPID::kKaon),
 627 //                       fESDpid->NumberOfSigmasTPC(track,AliPID::kProton)};
 628
 629     Double_t tofQA[4] = {0.,0.,0.,0.};
 630     if (!fUseTPConlyTracks) {
 631                  tofQA[0] = fESDpid->NumberOfSigmasTOF(track,AliPID::kElectron, time0);
 632                          tofQA[0] = fESDpid->NumberOfSigmasTOF(track,AliPID::kPion, time0);
 633                  tofQA[0] = fESDpid->NumberOfSigmasTOF(track,AliPID::kKaon, time0);
 634                  tofQA[0] = fESDpid->NumberOfSigmasTOF(track,AliPID::kProton, time0);
 635         }
 636         else{
 637                  tofQA[0] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kElectron, time0);
 638                          tofQA[0] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kPion, time0);
 639                  tofQA[0] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kKaon, time0);
 640                  tofQA[0] = fESDpid->NumberOfSigmasTOF(trackForTOF,AliPID::kProton, time0);
 641         }
 642
 643     //
 644     for(Int_t iPart = 0; iPart < 3; iPart++) { // loop over assumed particle type
 645       //                              0,           1,    2,    3,           4,               5,      6,              7,     8
 646       Double_t vecHistReal[9]  = {iPart,  centrality,   pT, sign,  rap[iPart], pullsTPC[iPart], hasTOF, pullsTOF[iPart], dca[0]};
 647       if (!fOnlyQA) fHistRealTracks->Fill(vecHistReal);
 648       //
 649       // using MC truth for precise efficiencies...
 650       //
 651       if (fMCtrue && !fOnlyQA) {
 652         Int_t code = 9; // code: 0-generated, 1-true rec. primaries, 2-misident, 3-second weak, 4-second material
 653         Int_t assumedPdg = 0;//2212(proton); 321(Kaon); 211(pion);
 654         Int_t motherCode = -1;
 655         if (iPart == 0) assumedPdg = 211;
 656         if (iPart == 1) assumedPdg = 321;
 657         if (iPart == 2) assumedPdg = 2212;
 658         //
 659         //
 660         TParticle *trackMC = stack->Particle(TMath::Abs(track->GetLabel()));
 661         Int_t pdg = TMath::Abs(trackMC->GetPdgCode());
 662         //
 663         if (pdg != assumedPdg && stack->IsPhysicalPrimary(TMath::Abs(track->GetLabel()))) code = 2;
 664         if (pdg != assumedPdg && stack->IsSecondaryFromWeakDecay(TMath::Abs(track->GetLabel()))) code = 5;
 665         if (pdg == assumedPdg && stack->IsPhysicalPrimary(TMath::Abs(track->GetLabel()))) code = 1;
 666         if (pdg == assumedPdg && stack->IsSecondaryFromWeakDecay(TMath::Abs(track->GetLabel()))) {
 667           code = 3;
 668           if (fSaveMotherPDG){
 669             TParticle *trackMother =  stack->Particle(TMath::Abs(trackMC->GetFirstMother()));
 670             if (trackMother->GetPdgCode() == 310) motherCode = 6; //K0
 671             if (trackMother->GetPdgCode() == 3122) motherCode = 7; //Lambda
 672             if (trackMother->GetPdgCode() == 3222) motherCode = 8; //Sigma+
 673           }
 674         }
 675         if (pdg == assumedPdg && stack->IsSecondaryFromMaterial(TMath::Abs(track->GetLabel()))) code = 4;
 676
 677         //
 678         // muons need special treatment, because they are indistinguishable from pions
 679         //
 680         if (iPart == 0 && pdg == 13  && stack->IsPhysicalPrimary(TMath::Abs(track->GetLabel()))) code = 1;
 681         if (iPart == 0 && pdg == 13  && stack->IsSecondaryFromWeakDecay(TMath::Abs(track->GetLabel()))) code = 3;
 682         //
 683         // check TOF mismatch on MC basis with TOF label
 684         //
 685         Int_t tofLabel[3];
 686         if (!fUseTPConlyTracks) track->GetTOFLabel(tofLabel);
 687         else trackForTOF->GetTOFLabel(tofLabel);
 688         if (TMath::Abs(track->GetLabel()) != TMath::Abs(tofLabel[0])) hasTOF = kFALSE;
 689         //
 690         // IMPORTANT BIG PROBLEM HERE THE PROBABLILITY TO HAVE A PID SIGNAL MUST BE IN !!!!!!!!!!!!
 691         //
 692         //                              0,           1,   2,    3,           4,               5,      6,               7,      8,   9
 693         Double_t vectorHistMC[10] = {iPart,  centrality,  pT, sign,  rap[iPart], pullsTPC[iPart], hasTOF, pullsTOF[iPart], dca[0], code};
 694         if (!fOnlyQA) {
 695           fHistMCparticles->Fill(vectorHistMC);
 696           if (motherCode != -1 && fSaveMotherPDG) { //if mother of weak decay is K0, lambda or sigma+ add track again with this information
 697             Double_t vectorHistMCmother[10] = {iPart,  centrality,  pT, sign,  rap[iPart], pullsTPC[iPart], hasTOF, pullsTOF[iPart], dca[0], motherCode};
 698             fHistMCparticles->Fill(vectorHistMCmother);
 699           }
 700         }
 701       }
 702       //
 703       //
 704       Int_t tpcShared = track->GetTPCnclsS();
 705       if (TMath::Abs(track->Eta()) < 0.8 && iPart == 0 && tpcShared < 4) fHistPidQA->Fill(ptot,tpcSignal,sign);
 706     } // end loop over assumed particle type
 707
 708           //need to delete tpconlytrack
 709           if (fUseTPConlyTracks){
 710                 delete track;
 711                 track = 0;
 712           }
 713
 714   } // end of track loop
 715
 716   // Post output data
 717   PostData(1, fListHist);
 718
 719 }
 720
 721
 722 //________________________________________________________________________
 723 void AliAnalysisCombinedHadronSpectra::Terminate(Option_t *)
 724 {
 725   // Draw result to the screen
 726   // Called once at the end of the query
 727   Printf("*** CONSTRUCTOR CALLED ****");
 728
 729 }
 730
 731
 732 //________________________________________________________________________
 733 Bool_t AliAnalysisCombinedHadronSpectra::SelectOnImpPar(AliESDtrack* t) {
 734   //
 735   // cut on transverse impact parameter // DEPRECATED
 736   //
 737   Float_t d0z0[2],covd0z0[3];
 738   t->GetImpactParameters(d0z0,covd0z0);
 739   Float_t sigma= 0.0050+0.0060/TMath::Power(t->Pt(),0.9);
 740   Float_t d0max = 7.*sigma;
 741   //
 742   Float_t sigmaZ = 0.0146+0.0070/TMath::Power(t->Pt(),1.114758);
 743   if (t->Pt() > 1) sigmaZ = 0.0216;
 744   Float_t d0maxZ = 5.*sigmaZ;
 745   //
 746   if(TMath::Abs(d0z0[0]) < d0max && TMath::Abs(d0z0[1]) < d0maxZ) return kTRUE;
 747   return kFALSE;
 748 }
 749
 750
 751 //________________________________________________________________________
 752 void AliAnalysisCombinedHadronSpectra::BinLogAxis(const TH1 *h) {
 753   //
 754   // Method for the correct logarithmic binning of histograms
 755   //
 756   TAxis *axis = h->GetXaxis();
 757   int bins = axis->GetNbins();
 758
 759   Double_t from = axis->GetXmin();
 760   Double_t to = axis->GetXmax();
 761   Double_t *newBins = new Double_t[bins + 1];
 762
 763   newBins[0] = from;
 764   Double_t factor = pow(to/from, 1./bins);
 765
 766   for (int i = 1; i <= bins; i++) {
 767    newBins[i] = factor * newBins[i-1];
 768   }
 769   axis->Set(bins, newBins);
 770   delete [] newBins;
 771
 772 }
 773
 774
 775 //________________________________________________________________________
 776 Int_t AliAnalysisCombinedHadronSpectra::GetPythiaEventProcessType(const AliHeader* aHeader, const Bool_t adebug) const {
 777   //
 778   // get the process type of the event.
 779   //
 780
 781   // can only read pythia headers, either directly or from cocktalil header
 782   AliGenPythiaEventHeader* pythiaGenHeader = dynamic_cast<AliGenPythiaEventHeader*>(aHeader->GenEventHeader());
 783
 784   if (!pythiaGenHeader) {
 785
 786     AliGenCocktailEventHeader* genCocktailHeader = dynamic_cast<AliGenCocktailEventHeader*>(aHeader->GenEventHeader());
 787     if (!genCocktailHeader) {
 788       //printf("AliAnalysisCombinedHadronSpectra::GetProcessType : Unknown header type (not Pythia or Cocktail). \n");
 789       return -1;
 790     }
 791
 792     TList* headerList = genCocktailHeader->GetHeaders();
 793     if (!headerList) {
 794       return -1;
 795     }
 796
 797     for (Int_t i=0; i<headerList->GetEntries(); i++) {
 798       pythiaGenHeader = dynamic_cast<AliGenPythiaEventHeader*>(headerList->At(i));
 799       if (pythiaGenHeader)
 800         break;
 801     }
 802
 803     if (!pythiaGenHeader) {
 804       //printf("AliAnalysisCombinedHadronSpectra::GetProcessType : Could not find Pythia header. \n");
 805       return -1;
 806     }
 807   }
 808
 809   if (adebug) {
 810     //printf("AliAnalysisCombinedHadronSpectra::GetProcessType : Pythia process type found: %d \n",pythiaGenHeader->ProcessType());
 811   }
 812
 813   return pythiaGenHeader->ProcessType();
 814 }