[u/mrichter/AliRoot.git] / PWG0 / multPbPb / AliAnalysisTaskMultPbTracks.cxx

// AliAnalysisTaskMultPbTracks

// Author: Michele Floris, CERN
// TODO:
// - Add chi2/cluster plot for primary, secondaries and fakes

#include "AliAnalysisTaskMultPbTracks.h"
#include "AliESDInputHandler.h"
#include "AliAnalysisMultPbTrackHistoManager.h"
#include "AliAnalysisManager.h"
#include "AliESDtrackCuts.h"
#include "AliMCEvent.h"
#include "AliStack.h"
#include "TH1I.h"
#include "TH3D.h"
#include "AliMCParticle.h"
#include "AliGenEventHeader.h"
#include "AliESDCentrality.h"
#include "AliMultiplicity.h"
#include <iostream>
#include "AliAnalysisMultPbCentralitySelector.h"

using namespace std;

ClassImp(AliAnalysisTaskMultPbTracks)

AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks()
: AliAnalysisTaskSE("TaskMultPbTracks"),
  fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
{
  // constructor

  DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class());
  DefineOutput(2, AliESDtrackCuts::Class());
  DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class());

  fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis");
  if(fIsMC) fHistoManager->SetSuffix("MC");

}
AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const char * name)
  : AliAnalysisTaskSE(name),
    fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
{
  //
  // Standard constructur which should be used
  //

  DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class());
  DefineOutput(2, AliESDtrackCuts::Class());
  DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class());

  fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis");
  if(fIsMC) fHistoManager->SetSuffix("MC");

}

AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const AliAnalysisTaskMultPbTracks& obj) : 
  AliAnalysisTaskSE(obj) ,fESD (0), fHistoManager(0), fCentrSelector(0), fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
{
  //copy ctor
  fESD = obj.fESD ;
  fHistoManager= obj.fHistoManager;
  fTrackCuts  = obj.fTrackCuts;
  fTrackCutsNoDCA  = obj.fTrackCutsNoDCA;
  fCentrSelector = obj.fCentrSelector;

}

AliAnalysisTaskMultPbTracks::~AliAnalysisTaskMultPbTracks(){
  // destructor

  if(!AliAnalysisManager::GetAnalysisManager()->IsProofMode()) {
    if(fHistoManager) {
      delete fHistoManager;
      fHistoManager = 0;
    }
  }
  // Histo list should not be destroyed: fListWrapper is owner!

}
void AliAnalysisTaskMultPbTracks::UserCreateOutputObjects()
{
  // Called once

  // For the DCA distributions, we want to use exactly the same cuts
  // as for the other distributions, with the exception of the DCA cut
  fTrackCutsNoDCA = new AliESDtrackCuts(*fTrackCuts); // clone cuts
  // Reset all DCA cuts; FIXME: is this all?
  fTrackCutsNoDCA->SetMaxDCAToVertexXY();
  fTrackCutsNoDCA->SetMaxDCAToVertexZ ();
  fTrackCutsNoDCA->SetMaxDCAToVertexXYPtDep();
  fTrackCutsNoDCA->SetMaxDCAToVertexZPtDep();

}


void AliAnalysisTaskMultPbTracks::UserExec(Option_t *)
{
  // User code

  /* PostData(0) is taken care of by AliAnalysisTaskSE */
  PostData(1,fHistoManager);
  PostData(2,fTrackCuts);
  PostData(3,fCentrSelector);

  // Cache histogram pointers
  static TH3D * hTracks  [AliAnalysisMultPbTrackHistoManager::kNHistos];
  static TH1D * hDCA     [AliAnalysisMultPbTrackHistoManager::kNHistos];
  static TH1D * hNTracks [AliAnalysisMultPbTrackHistoManager::kNHistos];
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]        = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoGen       );
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]        = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRec       );
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]    = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim   );
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]    = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecFake   );
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]  = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat );
  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak);

  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoGen]        = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoGen       );
  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec]        = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRec       );
  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]    = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim   );
  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]    = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecFake   );
  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]  = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat );
  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak);

  hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]        = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoGen );
  hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]        = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoRec );

  fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
  if (strcmp(fESD->ClassName(),"AliESDEvent")) {
    AliFatal("Not processing ESDs");
  }
  
  // FIXME: use physics selection here to keep track of events lost?
  fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatAll);

  Bool_t isSelected = (((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected() & fOfflineTrigger);

  if(!isSelected) return;
  fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatPhysSel);


  // Centrality selection
  Bool_t isCentralitySelected = fCentrSelector->IsCentralityBinSelected(fESD,fTrackCuts);  
  if(!isCentralitySelected) return;

  // AliESDCentrality *centrality = fESD->GetCentrality();
  // if(!centrality) {
  //   AliFatal("Centrality object not available"); 
  // }
  // else {
  //   Int_t centrBin = centrality->GetCentralityClass5(fCentralityEstimator.Data()) ;
    
  //   if (centrBin != fCentrBin && fCentrBin != -1) return;
  // }

  fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatCentr);


  if (fIsMC) {
    // Get MC vertex
    //FIXME: which vertex do I take for MC?
    TArrayF   vertex;
    fMCEvent->GenEventHeader()->PrimaryVertex(vertex);
    Float_t zvGen = vertex[2];    

    if (!fMCEvent) {
      AliError("No MC info found");
    } else {
      
      //loop on the MC event, only over primaries, which are always
      //      the first in stack.
      Int_t nMCTracks = fMCEvent->GetNumberOfPrimaries();
      Int_t nPhysicalPrimaries = 0;
      for (Int_t ipart=0; ipart<nMCTracks; ipart++) { 
	
	AliMCParticle *mcPart  = (AliMCParticle*)fMCEvent->GetTrack(ipart);
	
	// We don't care about neutrals and non-physical primaries
	if(mcPart->Charge() == 0) continue;

	//check if current particle is a physical primary
	if(!IsPhysicalPrimaryAndTransportBit(ipart)) continue;
 
	nPhysicalPrimaries++;
	// Fill species histo and particle species
	fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoGen)->Fill(mcPart->Particle()->GetUniqueID());
	fHistoManager->FillParticleID(AliAnalysisMultPbTrackHistoManager::kHistoGen, mcPart);
	
	//	Float_t zv = vtxESD->GetZ();
	// Fill generated histo
	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(mcPart->Pt(),mcPart->Eta(),zvGen);
	Int_t partCode = fHistoManager->GetLocalParticleID(mcPart);
	if (partCode == AliAnalysisMultPbTrackHistoManager::kPartPiPlus  || 
	    partCode == AliAnalysisMultPbTrackHistoManager::kPartPiMinus)
	  fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoGen, partCode);
	
      }
      hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(nPhysicalPrimaries);
      fHistoManager->GetHistoVzEvent(AliAnalysisMultPbTrackHistoManager::kHistoGen)->Fill(zvGen);
  
    
    }
  }
  

  // FIXME: shall I take the primary vertex?
  const AliESDVertex* vtxESD = fESD->GetPrimaryVertex();
  if(!vtxESD) return;
  // FIXME: leave the cuts here or find a better place?)
  // Quality cut on vertexer Z, as suggested by Francesco Prino
  if(vtxESD->IsFromVertexerZ()) {
    if (vtxESD->GetNContributors() <= 0) return;
    if (vtxESD->GetDispersion() >= 0.04) return;
    if (vtxESD->GetZRes() >= 0.25) return;
  }
  fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatVtx);
  fHistoManager->GetHistoVzEvent(AliAnalysisMultPbTrackHistoManager::kHistoRec)->Fill(vtxESD->GetZ());

  // loop on tracks
  Int_t ntracks = fESD->GetNumberOfTracks();
  Int_t acceptedTracks = 0;

  for (Int_t itrack = 0; itrack<ntracks; itrack++) {    
    AliESDtrack * esdTrack = fESD->GetTrack(itrack);

    // Fill DCA distibutions, without the DCA cut, Fill the other stuff, with all cuts!
    Bool_t accepted = fTrackCuts->AcceptTrack(esdTrack);
    Bool_t acceptedNoDCA = fTrackCutsNoDCA->AcceptTrack(esdTrack);

    if(accepted) acceptedTracks++;

    // Compute weighted offset
    // TODO: other choiches for the DCA?
    Double_t b = fESD->GetMagneticField();
    Double_t dca[2];
    Double_t cov[3];
    Double_t weightedDCA = 10;
    

    if (esdTrack->PropagateToDCA(vtxESD, b,3., dca, cov)) {
      Double_t det = cov[0]*cov[2]-cov[1]*cov[1]; 
      if (det<=0) {
	AliError("DCA Covariance matrix is not positive definite!");
      }
      else {
	weightedDCA = (dca[0]*dca[0]*cov[2]+dca[1]*dca[1]*cov[0]-2*dca[0]*dca[1]*cov[1])/det; 
	weightedDCA = weightedDCA>0 ? TMath::Sqrt(weightedDCA) : 10;
      }
      //      printf("dR:%e dZ%e  sigR2:%e sigRZ:%e sigZ2:%e\n",dca[0],dca[1],cov[0],cov[1],cov[2]);
    }
    

    // Alternative: p*DCA
    // Float_t xz[2]; 
    // esdTrack->GetDZ(vtxESD->GetX(),vtxESD->GetY(),vtxESD->GetZ(), fESD->GetMagneticField(), xz); 
    // Float_t dca = xz[0]*esdTrack->P();

    // for each track
    if(accepted) 
      hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
    if(acceptedNoDCA)
      hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(weightedDCA);

    // Fill separately primaries and secondaries
    // FIXME: fakes? Is this the correct way to account for them?
    // Get label and corresponding mcPart;
    if (fIsMC) {
      //      Int_t label = TMath::Abs(esdTrack->GetLabel()); // no fakes!!!
      Int_t label = esdTrack->GetLabel(); // 
      AliMCParticle *mcPart  = label < 0 ? 0 : (AliMCParticle*)fMCEvent->GetTrack(label);
      if (!mcPart)  {
	if(accepted)
	  hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	if(acceptedNoDCA)
	  hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(weightedDCA);
      }
      else {
	if(IsPhysicalPrimaryAndTransportBit(label)) {
	  // Fill species histo
	  fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim)->Fill(mcPart->Particle()->GetUniqueID());
	  if(accepted) {
	    hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	    Int_t partCode = fHistoManager->GetLocalParticleID(mcPart);
	    if (partCode == AliAnalysisMultPbTrackHistoManager::kPartPiPlus  || 
		partCode == AliAnalysisMultPbTrackHistoManager::kPartPiMinus)
	      fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim, partCode);
	  }
	  if(acceptedNoDCA)
	    hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(weightedDCA);
	} 
	else {
	  Int_t mfl=0;
	  Int_t indexMoth=mcPart->Particle()->GetFirstMother();
	  if(indexMoth>=0){
	    TParticle* moth = fMCEvent->Stack()->Particle(indexMoth);
	    Float_t codemoth = TMath::Abs(moth->GetPdgCode());
	    mfl = Int_t (codemoth/ TMath::Power(10, Int_t(TMath::Log10(codemoth))));
	  }
	  if(mfl==3){ // strangeness
	    fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak)->Fill(mcPart->Particle()->GetUniqueID());
	    if(accepted)
	      hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	    if(acceptedNoDCA)
	      hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(weightedDCA);	  
	  }else{ // material
	    fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat)->Fill(mcPart->Particle()->GetUniqueID());
	    if(accepted)
	      hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	    if(acceptedNoDCA)
	      hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(weightedDCA);	  

	  }


	}
      }
    }


  }
  //  cout << acceptedTracks << endl;
  
  hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]  ->Fill(acceptedTracks);
  // FIXME
  //  hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]  ->Fill(fESD->GetMultiplicity()->GetNumberOfTracklets());


}

void   AliAnalysisTaskMultPbTracks::Terminate(Option_t *){
  // terminate

}


Bool_t AliAnalysisTaskMultPbTracks::IsPhysicalPrimaryAndTransportBit(Int_t ipart) {

  Bool_t physprim=fMCEvent->IsPhysicalPrimary(ipart);
  if (!physprim) return kFALSE;
  Bool_t transported = ((AliMCParticle*)fMCEvent->GetTrack(ipart))->Particle()->TestBit(kTransportBit);
  if(!transported) return kFALSE;

  return kTRUE;

}

// void AliAnalysisTaskEvil::PrintProcInfo()
// {
//   ProcInfo_t info;
//   gSystem->GetProcInfo(&info);
//   AliInfo(Form("fMemResident=%10ld kB  fMemVirtual=%10ld kB",info.fMemResident,info.fMemVirtual));
// }
Commit	Line	Data
a23f7c97	1	// AliAnalysisTaskMultPbTracks
	2
	3	// Author: Michele Floris, CERN
	4	// TODO:
	5	// - Add chi2/cluster plot for primary, secondaries and fakes
a23f7c97	6
	7	#include "AliAnalysisTaskMultPbTracks.h"
	8	#include "AliESDInputHandler.h"
	9	#include "AliAnalysisMultPbTrackHistoManager.h"
	10	#include "AliAnalysisManager.h"
	11	#include "AliESDtrackCuts.h"
a23f7c97	12	#include "AliMCEvent.h"
	13	#include "AliStack.h"
	14	#include "TH1I.h"
	15	#include "TH3D.h"
	16	#include "AliMCParticle.h"
	17	#include "AliGenEventHeader.h"
54b31d6a	18	#include "AliESDCentrality.h"
7f5f2e0c	19	#include "AliMultiplicity.h"
a23f7c97	20	#include <iostream>
2bbfd8c6	21	#include "AliAnalysisMultPbCentralitySelector.h"
a23f7c97	22
	23	using namespace std;
	24
	25	ClassImp(AliAnalysisTaskMultPbTracks)
	26
	27	AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks()
54b31d6a	28	: AliAnalysisTaskSE("TaskMultPbTracks"),
2bbfd8c6	29	fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
a23f7c97	30	{
	31	// constructor
	32
	33	DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class());
54b31d6a	34	DefineOutput(2, AliESDtrackCuts::Class());
2bbfd8c6	35	DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class());
a23f7c97	36
	37	fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis");
	38	if(fIsMC) fHistoManager->SetSuffix("MC");
	39
	40	}
	41	AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const char * name)
54b31d6a	42	: AliAnalysisTaskSE(name),
2bbfd8c6	43	fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
a23f7c97	44	{
	45	//
	46	// Standard constructur which should be used
	47	//
	48
	49	DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class());
54b31d6a	50	DefineOutput(2, AliESDtrackCuts::Class());
2bbfd8c6	51	DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class());
a23f7c97	52
	53	fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis");
	54	if(fIsMC) fHistoManager->SetSuffix("MC");
	55
	56	}
	57
	58	AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const AliAnalysisTaskMultPbTracks& obj) :
2bbfd8c6	59	AliAnalysisTaskSE(obj) ,fESD (0), fHistoManager(0), fCentrSelector(0), fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0)
a23f7c97	60	{
	61	//copy ctor
	62	fESD = obj.fESD ;
	63	fHistoManager= obj.fHistoManager;
a23f7c97	64	fTrackCuts = obj.fTrackCuts;
a23f7c97	65	fTrackCutsNoDCA = obj.fTrackCutsNoDCA;
2bbfd8c6	66	fCentrSelector = obj.fCentrSelector;
a23f7c97	67
	68	}
	69
	70	AliAnalysisTaskMultPbTracks::~AliAnalysisTaskMultPbTracks(){
	71	// destructor
	72
	73	if(!AliAnalysisManager::GetAnalysisManager()->IsProofMode()) {
	74	if(fHistoManager) {
	75	delete fHistoManager;
	76	fHistoManager = 0;
	77	}
	78	}
	79	// Histo list should not be destroyed: fListWrapper is owner!
	80
	81	}
	82	void AliAnalysisTaskMultPbTracks::UserCreateOutputObjects()
	83	{
	84	// Called once
	85
	86	// For the DCA distributions, we want to use exactly the same cuts
	87	// as for the other distributions, with the exception of the DCA cut
	88	fTrackCutsNoDCA = new AliESDtrackCuts(*fTrackCuts); // clone cuts
	89	// Reset all DCA cuts; FIXME: is this all?
	90	fTrackCutsNoDCA->SetMaxDCAToVertexXY();
	91	fTrackCutsNoDCA->SetMaxDCAToVertexZ ();
	92	fTrackCutsNoDCA->SetMaxDCAToVertexXYPtDep();
	93	fTrackCutsNoDCA->SetMaxDCAToVertexZPtDep();
	94
	95	}
	96
	97
	98	void AliAnalysisTaskMultPbTracks::UserExec(Option_t *)
	99	{
	100	// User code
	101
	102	/* PostData(0) is taken care of by AliAnalysisTaskSE */
	103	PostData(1,fHistoManager);
54b31d6a	104	PostData(2,fTrackCuts);
2bbfd8c6	105	PostData(3,fCentrSelector);
a23f7c97	106
54b31d6a	107	// Cache histogram pointers
e0376287	108	static TH3D * hTracks [AliAnalysisMultPbTrackHistoManager::kNHistos];
	109	static TH1D * hDCA [AliAnalysisMultPbTrackHistoManager::kNHistos];
	110	static TH1D * hNTracks [AliAnalysisMultPbTrackHistoManager::kNHistos];
a23f7c97	111	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoGen );
	112	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRec );
	113	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim );
	114	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecFake );
	115	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat );
	116	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak);
	117
	118	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoGen );
	119	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRec );
	120	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim );
	121	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecFake );
	122	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat );
	123	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak);
	124
2bbfd8c6	125	hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoGen );
2bbfd8c6	126	hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoRec );
a23f7c97	127
	128	fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
	129	if (strcmp(fESD->ClassName(),"AliESDEvent")) {
	130	AliFatal("Not processing ESDs");
	131	}
	132
	133	// FIXME: use physics selection here to keep track of events lost?
	134	fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatAll);
	135
8b628a20	136	Bool_t isSelected = (((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected() & fOfflineTrigger);
	137
	138	if(!isSelected) return;
	139	fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatPhysSel);
	140
	141
54b31d6a	142	// Centrality selection
2bbfd8c6	143	Bool_t isCentralitySelected = fCentrSelector->IsCentralityBinSelected(fESD,fTrackCuts);
	144	if(!isCentralitySelected) return;
	145
	146	// AliESDCentrality *centrality = fESD->GetCentrality();
	147	// if(!centrality) {
	148	// AliFatal("Centrality object not available");
	149	// }
	150	// else {
	151	// Int_t centrBin = centrality->GetCentralityClass5(fCentralityEstimator.Data()) ;
54b31d6a	152
2bbfd8c6	153	// if (centrBin != fCentrBin && fCentrBin != -1) return;
2bbfd8c6	154	// }
a23f7c97	155
	156	fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatCentr);
	157
4d0aa70f	158
4d0aa70f	159
a23f7c97	160	if (fIsMC) {
4d0aa70f	161	// Get MC vertex
	162	//FIXME: which vertex do I take for MC?
	163	TArrayF vertex;
	164	fMCEvent->GenEventHeader()->PrimaryVertex(vertex);
	165	Float_t zvGen = vertex[2];
a23f7c97	166
	167	if (!fMCEvent) {
	168	AliError("No MC info found");
	169	} else {
	170
e0376287	171	//loop on the MC event, only over primaries, which are always
	172	// the first in stack.
	173	Int_t nMCTracks = fMCEvent->GetNumberOfPrimaries();
	174	Int_t nPhysicalPrimaries = 0;
	175	for (Int_t ipart=0; ipart<nMCTracks; ipart++) {
a23f7c97	176
	177	AliMCParticle mcPart = (AliMCParticle)fMCEvent->GetTrack(ipart);
	178
	179	// We don't care about neutrals and non-physical primaries
	180	if(mcPart->Charge() == 0) continue;
	181
54b31d6a	182	//check if current particle is a physical primary
e0376287	183	if(!IsPhysicalPrimaryAndTransportBit(ipart)) continue;
54b31d6a	184
e0376287	185	nPhysicalPrimaries++;
3b8cbf2d	186	// Fill species histo and particle species
	187	fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoGen)->Fill(mcPart->Particle()->GetUniqueID());
	188	fHistoManager->FillParticleID(AliAnalysisMultPbTrackHistoManager::kHistoGen, mcPart);
e0376287	189
a23f7c97	190	// Float_t zv = vtxESD->GetZ();
a23f7c97	191	// Fill generated histo
4d0aa70f	192	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(mcPart->Pt(),mcPart->Eta(),zvGen);
	193	Int_t partCode = fHistoManager->GetLocalParticleID(mcPart);
	194	if (partCode == AliAnalysisMultPbTrackHistoManager::kPartPiPlus \|\|
	195	partCode == AliAnalysisMultPbTrackHistoManager::kPartPiMinus)
	196	fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoGen, partCode);
a23f7c97	197
a23f7c97	198	}
e0376287	199	hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(nPhysicalPrimaries);
4d0aa70f	200	fHistoManager->GetHistoVzEvent(AliAnalysisMultPbTrackHistoManager::kHistoGen)->Fill(zvGen);
	201
	202
a23f7c97	203	}
	204	}
	205
e0376287	206
a23f7c97	207	// FIXME: shall I take the primary vertex?
	208	const AliESDVertex* vtxESD = fESD->GetPrimaryVertex();
	209	if(!vtxESD) return;
4d0aa70f	210	// FIXME: leave the cuts here or find a better place?)
	211	// Quality cut on vertexer Z, as suggested by Francesco Prino
	212	if(vtxESD->IsFromVertexerZ()) {
	213	if (vtxESD->GetNContributors() <= 0) return;
	214	if (vtxESD->GetDispersion() >= 0.04) return;
	215	if (vtxESD->GetZRes() >= 0.25) return;
	216	}
a23f7c97	217	fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatVtx);
4d0aa70f	218	fHistoManager->GetHistoVzEvent(AliAnalysisMultPbTrackHistoManager::kHistoRec)->Fill(vtxESD->GetZ());
a23f7c97	219
	220	// loop on tracks
	221	Int_t ntracks = fESD->GetNumberOfTracks();
2bbfd8c6	222	Int_t acceptedTracks = 0;
a23f7c97	223
	224	for (Int_t itrack = 0; itrack<ntracks; itrack++) {
	225	AliESDtrack * esdTrack = fESD->GetTrack(itrack);
	226
	227	// Fill DCA distibutions, without the DCA cut, Fill the other stuff, with all cuts!
	228	Bool_t accepted = fTrackCuts->AcceptTrack(esdTrack);
	229	Bool_t acceptedNoDCA = fTrackCutsNoDCA->AcceptTrack(esdTrack);
	230
2bbfd8c6	231	if(accepted) acceptedTracks++;
2bbfd8c6	232
a23f7c97	233	// Compute weighted offset
	234	// TODO: other choiches for the DCA?
	235	Double_t b = fESD->GetMagneticField();
	236	Double_t dca[2];
	237	Double_t cov[3];
	238	Double_t weightedDCA = 10;
	239
	240
	241
	242	if (esdTrack->PropagateToDCA(vtxESD, b,3., dca, cov)) {
	243	Double_t det = cov[0]cov[2]-cov[1]cov[1];
	244	if (det<=0) {
	245	AliError("DCA Covariance matrix is not positive definite!");
	246	}
	247	else {
	248	weightedDCA = (dca[0]dca[0]cov[2]+dca[1]dca[1]cov[0]-2dca[0]dca[1]*cov[1])/det;
	249	weightedDCA = weightedDCA>0 ? TMath::Sqrt(weightedDCA) : 10;
	250	}
	251	// printf("dR:%e dZ%e sigR2:%e sigRZ:%e sigZ2:%e\n",dca[0],dca[1],cov[0],cov[1],cov[2]);
	252	}
	253
	254
	255
	256
	257	// Alternative: p*DCA
	258	// Float_t xz[2];
	259	// esdTrack->GetDZ(vtxESD->GetX(),vtxESD->GetY(),vtxESD->GetZ(), fESD->GetMagneticField(), xz);
	260	// Float_t dca = xz[0]*esdTrack->P();
	261
	262	// for each track
	263	if(accepted)
	264	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	265	if(acceptedNoDCA)
	266	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(weightedDCA);
	267
	268	// Fill separately primaries and secondaries
	269	// FIXME: fakes? Is this the correct way to account for them?
	270	// Get label and corresponding mcPart;
	271	if (fIsMC) {
	272	// Int_t label = TMath::Abs(esdTrack->GetLabel()); // no fakes!!!
	273	Int_t label = esdTrack->GetLabel(); //
e0376287	274	AliMCParticle mcPart = label < 0 ? 0 : (AliMCParticle)fMCEvent->GetTrack(label);
a23f7c97	275	if (!mcPart) {
	276	if(accepted)
	277	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	278	if(acceptedNoDCA)
	279	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(weightedDCA);
	280	}
	281	else {
e0376287	282	if(IsPhysicalPrimaryAndTransportBit(label)) {
e0376287	283	// Fill species histo
3b8cbf2d	284	fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim)->Fill(mcPart->Particle()->GetUniqueID());
4d0aa70f	285	if(accepted) {
a23f7c97	286	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
4d0aa70f	287	Int_t partCode = fHistoManager->GetLocalParticleID(mcPart);
	288	if (partCode == AliAnalysisMultPbTrackHistoManager::kPartPiPlus \|\|
	289	partCode == AliAnalysisMultPbTrackHistoManager::kPartPiMinus)
	290	fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim, partCode);
	291	}
a23f7c97	292	if(acceptedNoDCA)
	293	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(weightedDCA);
	294	}
	295	else {
	296	Int_t mfl=0;
	297	Int_t indexMoth=mcPart->Particle()->GetFirstMother();
	298	if(indexMoth>=0){
	299	TParticle* moth = fMCEvent->Stack()->Particle(indexMoth);
	300	Float_t codemoth = TMath::Abs(moth->GetPdgCode());
	301	mfl = Int_t (codemoth/ TMath::Power(10, Int_t(TMath::Log10(codemoth))));
	302	}
	303	if(mfl==3){ // strangeness
3b8cbf2d	304	fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak)->Fill(mcPart->Particle()->GetUniqueID());
a23f7c97	305	if(accepted)
	306	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	307	if(acceptedNoDCA)
	308	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(weightedDCA);
	309	}else{ // material
3b8cbf2d	310	fHistoManager->GetHistoProcess(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat)->Fill(mcPart->Particle()->GetUniqueID());
a23f7c97	311	if(accepted)
	312	hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ());
	313	if(acceptedNoDCA)
	314	hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(weightedDCA);
	315
	316	}
	317
	318
	319	}
	320	}
	321	}
	322
	323
	324	}
2bbfd8c6	325	// cout << acceptedTracks << endl;
	326
	327	hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] ->Fill(acceptedTracks);
7f5f2e0c	328	// FIXME
7f5f2e0c	329	// hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] ->Fill(fESD->GetMultiplicity()->GetNumberOfTracklets());
a23f7c97	330
	331
	332	}
	333
	334	void AliAnalysisTaskMultPbTracks::Terminate(Option_t *){
	335	// terminate
	336
	337	}
	338
	339
e0376287	340	Bool_t AliAnalysisTaskMultPbTracks::IsPhysicalPrimaryAndTransportBit(Int_t ipart) {
	341
	342	Bool_t physprim=fMCEvent->IsPhysicalPrimary(ipart);
	343	if (!physprim) return kFALSE;
	344	Bool_t transported = ((AliMCParticle*)fMCEvent->GetTrack(ipart))->Particle()->TestBit(kTransportBit);
	345	if(!transported) return kFALSE;
	346
	347	return kTRUE;
	348
	349	}
eef42d18	350
	351	// void AliAnalysisTaskEvil::PrintProcInfo()
	352	// {
	353	// ProcInfo_t info;
	354	// gSystem->GetProcInfo(&info);
	355	// AliInfo(Form("fMemResident=%10ld kB fMemVirtual=%10ld kB",info.fMemResident,info.fMemVirtual));
	356	// }