[u/mrichter/AliRoot.git] / HLT / trigger / AliHLTD0Trigger.cxx

// $Id: AliHLTD0Trigger.cxx 
//**************************************************************************
//* This file is property of and copyright by the ALICE HLT Project        * 
//* ALICE Experiment at CERN, All rights reserved.                         *
//*                                                                        *
//* Primary Authors: Gaute Ovrebekk                                        *
//*                  for The ALICE HLT Project.                            *
//*                                                                        *
//* Permission to use, copy, modify and distribute this software and its   *
//* documentation strictly for non-commercial purposes is hereby granted   *
//* without fee, provided that the above copyright notice appears in all   *
//* copies and that both the copyright notice and this permission notice   *
//* appear in the supporting documentation. The authors make no claims     *
//* about the suitability of this software for any purpose. It is          *
//* provided "as is" without express or implied warranty.                  *
//**************************************************************************

/// @file   AliHLTD0Trigger.cxx
/// @author Gaute Ovrebekk
/// @date   2009-10-28
/// @brief  HLT trigger component for D0->Kpi

// see header file for class documentation
// or
// refer to README to build package
// or
// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt

#include "AliHLTD0Trigger.h"
#include "AliESDEvent.h"
#include "AliESDv0.h"
#include "AliHLTTriggerDecision.h"
#include "AliHLTDomainEntry.h"
#include "AliHLTGlobalBarrelTrack.h"
#include "TObjArray.h"
#include "TObjString.h"
#include "TDatabasePDG.h"
#include "AliESDVertex.h"
#include "TH1F.h"
#include "AliHLTD0toKpi.h"
#include "AliAODVertex.h"
#include "AliESDVertex.h"
#include "AliAODRecoDecay.h"
#include "AliHLTMCEvent.h"
#include "AliStack.h"
#include "TParticle.h"
#include "TMap.h"

/** ROOT macro for the implementation of ROOT specific class methods */
ClassImp(AliHLTD0Trigger)

AliHLTD0Trigger::AliHLTD0Trigger()
  : AliHLTTrigger()
  , fPtMin(0.0)
  , fdca(0.0)
  , finvMass(0.0)     
  , fcosThetaStar(0.0)
  , fd0(0.0) 
  , fd0d0(0.0)
  , fcosPoint(0.0)
  , fplothisto(false)
  , fUseV0(false)
  , fD0PDG(TDatabasePDG::Instance()->GetParticle(421)->Mass())
  , fD0mass(NULL)
  , fD0pt(NULL)
  , fPos()
  , fNeg()
  , fd0calc(NULL)                  
  , ftwoTrackArray(NULL)
  , fTotalD0(0)
  , fTotalD0Onetrue(0)
  , fTotalD0true(0)
  , fEvent(NULL)
  , fuseKF(false)
{
  
  // see header file for class documentation
  // or
  // refer to README to build package
  // or
  // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt

}

const char* AliHLTD0Trigger::fgkOCDBEntry="HLT/ConfigHLT/D0Trigger";

AliHLTD0Trigger::~AliHLTD0Trigger()
{
 
}
  
const char* AliHLTD0Trigger::GetTriggerName() const
{
  // see header file for class documentation
  return "D0Trigger";
}

AliHLTComponent* AliHLTD0Trigger::Spawn()
{
  // see header file for class documentation
  return new AliHLTD0Trigger;
}

int AliHLTD0Trigger::DoTrigger()
{
  // -- Iterator over Data Blocks --
  //const AliHLTComponentBlockData* iter = NULL;

  if (!IsDataEvent()) return 0;

  HLTDebug("Used  Cuts: pT: %f , DCA: %f , InvMass: %f , CosThetaStar: %f , d0: %f , d0xd0: %f , CosPointingAngle: %f",fPtMin,fdca,finvMass,fcosThetaStar,fd0,fd0d0,fcosPoint);

  Int_t nD0=0;
  Int_t nD0Onetrue=0;
  Int_t nD0true=0;
  TString description;

  for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeMCObject|kAliHLTDataOriginHLT); iter != NULL; iter = GetNextInputObject() ) {   
    fEvent = dynamic_cast<AliHLTMCEvent*>(const_cast<TObject*>( iter ) );
    if ( ! fEvent ) {
      HLTError( "No MC Event present!" );
      break;
    }
  }

  const AliESDVertex *Vertex=NULL;

  for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeESDObject); iter != NULL; iter = GetNextInputObject() ) {   
    if(fUseV0){
      nD0=RecV0(iter);
    }
    else{
       AliESDEvent *event = dynamic_cast<AliESDEvent*>(const_cast<TObject*>( iter ) );
       event->GetStdContent();
       Double_t field = event->GetMagneticField();
       Vertex = event->GetPrimaryVertexTracks();
       if(!Vertex || Vertex->GetNContributors()<2){
	 HLTDebug("Contributors in ESD vertex to low or not been set");
	 continue;
       }
       for(Int_t it=0;it<event->GetNumberOfTracks();it++){
	 SingleTrackSelect(event->GetTrack(it),Vertex,field);
       }
       RecD0(nD0,nD0Onetrue,nD0true,Vertex,field);       
    }
  }

  for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeESDVertex|kAliHLTDataOriginOut); 
	iter != NULL; iter = GetNextInputObject() ) { 
    Vertex = dynamic_cast<const AliESDVertex*>(iter);
    if(!Vertex){
      HLTError("Vertex object is corrupted");
      //iResult = -EINVAL;    
    }
  }  
   
  for ( const AliHLTComponentBlockData* iter = GetFirstInputBlock(kAliHLTDataTypeTrack|kAliHLTDataOriginITS); 
	iter != NULL; iter = GetNextInputBlock() ) { 
    vector<AliHLTGlobalBarrelTrack> tracksVector;
    AliHLTGlobalBarrelTrack::ConvertTrackDataArray(reinterpret_cast<const AliHLTTracksData*>(iter->fPtr), iter->fSize, tracksVector);
    
    Double_t field = GetBz();
    if (Vertex){
      for(UInt_t i=0;i<tracksVector.size();i++){
	SingleTrackSelect(&tracksVector[i],Vertex,field);
      }
      RecD0(nD0,nD0Onetrue,nD0true,Vertex,field);
    }    
  }
  
  fTotalD0+=nD0;
  fTotalD0Onetrue += nD0Onetrue;
  fTotalD0true += nD0true;

  ftwoTrackArray->Clear();
  fPos.clear();
  fNeg.clear();
     
  HLTDebug("Number of D0 found: %d",nD0);
  HLTDebug("Number of D0 candidates with one track as D0 decay: %d",nD0Onetrue);
  HLTDebug("Number of True D0 found: %d",nD0true);
  HLTDebug("Total Number of D0 found: %d",fTotalD0);
  HLTDebug("Number of D0 candidates with one track as D0 decay: %d",fTotalD0Onetrue);
  HLTDebug("Total Number of True D0 found: %d",fTotalD0true);

  if(fplothisto){
    PushBack( (TObject*) fD0mass, kAliHLTDataTypeHistogram,0);
    PushBack( (TObject*) fD0pt, kAliHLTDataTypeHistogram,0);
  }
  
  //if (iResult>=0) {
  if (1) {
   
    if (nD0>=1) {
      description.Form("Event contains %d D0(s)", nD0);
      SetDescription(description.Data());
      // Enable the central detectors for readout.
      GetReadoutList().Enable(
			      AliHLTReadoutList::kITSSPD |
			      AliHLTReadoutList::kITSSDD |
			      AliHLTReadoutList::kITSSSD |
			      AliHLTReadoutList::kTPC |
			      AliHLTReadoutList::kTRD |
			      AliHLTReadoutList::kTOF |
			      AliHLTReadoutList::kHMPID |
			      AliHLTReadoutList::kPHOS
			      );
      // Add the available HLT information for readout too.
      GetTriggerDomain().Add("CLUSTERS", "TPC ");
      TriggerEvent(true);
      return 0;
    }
    description.Form("No D0");
  } else {
    description.Form("No input blocks found");
  }
  SetDescription(description.Data());
  TriggerEvent(false);
  //return iResult;
  return 0;
}

int AliHLTD0Trigger::DoInit(int argc, const char** argv)
{
  
  fd0calc = new AliHLTD0toKpi();
  ftwoTrackArray = new TObjArray(2);

  fplothisto=false;
  // see header file for class documentation
  fD0mass = new TH1F("hMass","D^{0} mass plot",100,1.7,2);
  fD0pt = new TH1F("hPt","D^{0} Pt plot",20,0,20);
  // first configure the default
  int iResult=0;
  if (iResult>=0) iResult=ConfigureFromCDBTObjString(fgkOCDBEntry);

  // configure from the command line parameters if specified
  if (iResult>=0 && argc>0)
    iResult=ConfigureFromArgumentString(argc, argv);
  return iResult;
}

int AliHLTD0Trigger::DoDeinit()
{
  // see header file for class documentation
  if(fd0calc){delete fd0calc; fd0calc = NULL;}  
  if(fD0mass){delete fD0mass; fD0mass = NULL;}
  if(fD0pt){delete fD0pt; fD0pt=NULL;}
  if(ftwoTrackArray){delete ftwoTrackArray; ftwoTrackArray=NULL;}
  
  return 0;
}

int AliHLTD0Trigger::Reconfigure(const char* cdbEntry, const char* /*chainId*/)
{
  // see header file for class documentation

  // configure from the specified antry or the default one
  const char* entry=cdbEntry;
  if (!entry || entry[0]==0) {
    entry=fgkOCDBEntry;
  }

  return ConfigureFromCDBTObjString(entry);
}

int AliHLTD0Trigger::ScanConfigurationArgument(int argc, const char** argv)
{
  // see header file for class documentation
  if (argc<=0) return 0;
  int i=0;
  TString argument=argv[i];
  // -minpt for decay
  if (argument.CompareTo("-pt")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fPtMin=argument.Atof();
    return 2;
  }    
  // minimum dca for decay tracks
  if (argument.CompareTo("-dca")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fdca=argument.Atof();
    return 2;
  }
  // inv. mass half width.
  if (argument.CompareTo("-invmass")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    finvMass=argument.Atof();
    return 2;
  }

// cos theta for decay angle
  if (argument.CompareTo("-costhetastar")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fcosThetaStar=argument.Atof();
    return 2;
  }

  // impact parameter for decay
  if (argument.CompareTo("-d0")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fd0=argument.Atof();
    return 2;
  }
  // product of impact parameter
  if (argument.CompareTo("-d0d0")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fd0d0=argument.Atof();
    return 2;
  }
  // product of impact parameter
  if (argument.CompareTo("-cospoint")==0) {
    if (++i>=argc) return -EPROTO;
    argument=argv[i];
    fcosPoint=argument.Atof();
    return 2;
  }
  if (argument.CompareTo("-plothistogram")==0) {
    fplothisto=true;
    return 1;
  }
  if (argument.CompareTo("-usev0")==0) {
    fUseV0=true;
    return 1;
  }
  if (argument.CompareTo("-useKF")==0) {
    fuseKF=true;
    return 1;
  }
  // unknown argument
  return -EINVAL;
}

void AliHLTD0Trigger::SingleTrackSelect(AliExternalTrackParam* t, const AliESDVertex* pv,Double_t field){
  // Offline uses || on the cuts of decay products
  if (!pv) return;

  Double_t pvpos[3];
  pv->GetXYZ(pvpos);

  if(t->Pt()<fPtMin){return;}
  if(TMath::Abs(t->GetD(pvpos[0],pvpos[1],field)) > fd0){return;}

  if(t->Charge()>0){
    fPos.push_back(t);
  }
  else{
    fNeg.push_back(t);
  }
}

void AliHLTD0Trigger::RecD0(Int_t& nD0,Int_t& nD0Onetrue ,Int_t& nD0true,const AliESDVertex* pv,Double_t field){
  // Default way of reconstructing D0's. Both from ESD and Barreltracks
  Double_t D0,D0bar,xdummy,ydummy; 
  Double_t d0[2];
  Double_t svpos[3];
  Double_t pvpos[3];
  
  if(!pv){
    HLTError("No Vertex is set");
    return;
  }
  pv->GetXYZ(pvpos);
    
  for(UInt_t ip=0;ip<fPos.size();ip++){
    AliExternalTrackParam *tP=fPos[ip];
    for(UInt_t in=0;in<fNeg.size();in++){
      AliExternalTrackParam *tN=fNeg[in];
          
      tP->PropagateToDCA(pv,field,kVeryBig);  //do I need this??????
      tN->PropagateToDCA(pv,field,kVeryBig);
      
      Double_t dcatPtN = tP->GetDCA(tN,field,xdummy,ydummy);
      if(dcatPtN>fdca) { continue; }
      
      ftwoTrackArray->AddAt(tP,0);
      ftwoTrackArray->AddAt(tN,1);
      AliAODVertex *vertexp1n1 = fd0calc->ReconstructSecondaryVertex(ftwoTrackArray,field,pv,fuseKF);
      if(!vertexp1n1) { 
	ftwoTrackArray->Clear();
	continue; 
      }
      
      vertexp1n1->GetXYZ(svpos);
      
      tP->PropagateToDCA(vertexp1n1,field,kVeryBig); 
      tN->PropagateToDCA(vertexp1n1,field,kVeryBig);
      
      /*
      Double_t px[2],py[2],pz[2];
      Double_t momentum[3];
      tP->GetPxPyPz(momentum);
      px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
      tN->GetPxPyPz(momentum);
      px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];

      Short_t dummycharge=0;
      Double_t *dummyd0 = new Double_t[2];
      Int_t nprongs = 2;

      for(Int_t ipr=0;ipr<nprongs;ipr++) dummyd0[ipr]=0.;
      AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
      delete [] dummyd0; dummyd0=NULL;

      UInt_t pdg2[2],pdg2bar[2];
      Double_t mPDG,minv,minvbar;

      pdg2[0]=211; pdg2[1]=321; pdg2bar[0]=321; pdg2bar[1]=211;
      minv = rd->InvMass(nprongs,pdg2);
      minvbar = rd->InvMass(nprongs,pdg2bar);
      if(TMath::Abs(minv-fD0PDG)>finvMass && TMath::Abs(minv-fD0PDG)>finvMass) {continue; delete vertexp1n1; delete rd;}
      */
      if((TMath::Abs(fd0calc->InvMass(tN,tP)-fD0PDG)) > finvMass && TMath::Abs((fd0calc->InvMass(tP,tN))-fD0PDG) > finvMass){continue;}
      fd0calc->cosThetaStar(tN,tP,D0,D0bar);
      if(TMath::Abs(D0) > fcosThetaStar && TMath::Abs(D0bar) > fcosThetaStar){continue;}
      d0[0] = tP->GetD(pvpos[0],pvpos[1],field);
      d0[1] = tN->GetD(pvpos[0],pvpos[1],field);
      if((d0[0]*d0[1]) > fd0d0){continue;}
      if(fd0calc->pointingAngle(tN,tP,pvpos,svpos) < fcosPoint){continue;}
      
      if(fplothisto){
	//fD0mass->Fill(minv);
	//fD0mass->Fill(minvbar);
	fD0mass->Fill(fd0calc->InvMass(tN,tP));
	fD0mass->Fill(fd0calc->InvMass(tP,tN));
	fD0pt->Fill(fd0calc->Pt(tP,tN));
	/*
	if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass){
	  fD0mass->Fill(fd0calc->InvMass(tN,tP));
	}
	else{
	  fD0mass->Fill(fd0calc->InvMass(tP,tN));
	  }
	*/
      }
      
      if(CheckTrackMC(tP,tN)==2){
	nD0true++;
      }
      if(CheckTrackMC(tP,tN)==1){
	nD0Onetrue++;
      }

      nD0++;
      vertexp1n1->RemoveCovMatrix();
      delete vertexp1n1;
    }
  }
}

Int_t AliHLTD0Trigger::RecV0(const TObject* iter){
  // Reconstruction D0's from the V0 found by the V0 finder
  int nD0=0;
  Double_t d0[2];
  Double_t D0,D0bar; 
  Double_t svpos[3];
  Double_t pvpos[3];
  
  AliESDEvent *event = dynamic_cast<AliESDEvent*>(const_cast<TObject*>( iter ) );
  event->GetStdContent();
  Int_t nV0 = event->GetNumberOfV0s();
  Double_t field = event->GetMagneticField();
  const AliESDVertex* pv = event->GetPrimaryVertexTracks();
  pv->GetXYZ(pvpos);

  for (Int_t iv=0; iv<nV0; iv++) {
      
      AliESDtrack *tN=event->GetTrack( event->GetV0(iv)->GetNindex());
      AliESDtrack *tP=event->GetTrack( event->GetV0(iv)->GetPindex());      
      
      if(tN->Pt()<fPtMin && tP->Pt()<fPtMin){continue;} //||????
      
      d0[0] = tP->GetD(pvpos[0],pvpos[1],field);
      d0[1] = tN->GetD(pvpos[0],pvpos[1],field);
      
      if(d0[0]>fd0 && d0[0]>fd0){continue;} // make sure < or>
      
      event->GetV0(iv)->GetXYZ(svpos[0],svpos[1],svpos[2]);
      
      if(!tN->PropagateTo(svpos[0],field) && !tP->PropagateTo(svpos[0],field)){
      	HLTInfo("Tracks could not be propagated to secondary vertex");
      	continue;
      }
      
      Double_t tmp1, tmp2;
      if(tN->GetDCA(tP,field,tmp1,tmp2) > fdca){continue;}
      
      if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass && (fd0calc->InvMass(tP,tN) - fD0PDG) > finvMass){continue;}
      fd0calc->cosThetaStar(tN,tP,D0,D0bar);
      if(D0 > fcosThetaStar && D0bar > fcosThetaStar){continue;}
      if((d0[0]*d0[1]) > fd0d0){continue;}
      if(fd0calc->pointingAngle(tN,tP,pvpos,svpos) < fcosPoint){continue;}
      
      nD0++;
      if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass){
	fD0mass->Fill(fd0calc->InvMass(tN,tP));
      }
      else{
	fD0mass->Fill(fd0calc->InvMass(tP,tN));
      }
  }
  return nD0;
  
}
int AliHLTD0Trigger::CheckTrackMC(AliExternalTrackParam* pt, AliExternalTrackParam* pn){
  // Checks if decay products both came from a D0 or one.
  if(!fEvent){return 0;}

  int lP = pt->GetLabel();
  int lN = pn->GetLabel();

  if(lN>=0 && lP>=0){
    
    int imP = (fEvent->Particle(lP))->GetFirstMother();
    int imN = (fEvent->Particle(lN))->GetFirstMother();
    
    if(imP>=0 && imN>=0){
      TParticle * mP = fEvent->Particle(imP);
      TParticle * mN = fEvent->Particle(imN);
      if((fabs(mP->GetPdgCode())==421 && fabs(mN->GetPdgCode())==421) && imP == imN){
	return 2;
      }
      if((fabs(mP->GetPdgCode())==421 || fabs(mN->GetPdgCode())==421) && imP == imN){
	return 1;
      }
    }
  }
  return 0;
}
void AliHLTD0Trigger::GetOCDBObjectDescription( TMap* const targetMap)
{
  // Get a list of OCDB object description.
  if (!targetMap) return;
  targetMap->Add(new TObjString("HLT/ConfigHLT/D0Trigger"),new TObjString("Object with default cuts for D0 reconstruction" ));
}
Commit	Line	Data
5f4502cc	1	// $Id: AliHLTD0Trigger.cxx
	2	//**************************************************************************
	3	//* This file is property of and copyright by the ALICE HLT Project *
	4	//* ALICE Experiment at CERN, All rights reserved. *
	5	//* *
	6	//* Primary Authors: Gaute Ovrebekk *
	7	//* for The ALICE HLT Project. *
	8	//* *
	9	//* Permission to use, copy, modify and distribute this software and its *
	10	//* documentation strictly for non-commercial purposes is hereby granted *
	11	//* without fee, provided that the above copyright notice appears in all *
	12	//* copies and that both the copyright notice and this permission notice *
	13	//* appear in the supporting documentation. The authors make no claims *
	14	//* about the suitability of this software for any purpose. It is *
	15	//* provided "as is" without express or implied warranty. *
	16	//**************************************************************************
	17
	18	/// @file AliHLTD0Trigger.cxx
	19	/// @author Gaute Ovrebekk
	20	/// @date 2009-10-28
	21	/// @brief HLT trigger component for D0->Kpi
	22
	23	// see header file for class documentation
	24	// or
	25	// refer to README to build package
	26	// or
	27	// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
	28
	29	#include "AliHLTD0Trigger.h"
	30	#include "AliESDEvent.h"
5f4502cc	31	#include "AliESDv0.h"
	32	#include "AliHLTTriggerDecision.h"
	33	#include "AliHLTDomainEntry.h"
	34	#include "AliHLTGlobalBarrelTrack.h"
	35	#include "TObjArray.h"
	36	#include "TObjString.h"
	37	#include "TDatabasePDG.h"
	38	#include "AliESDVertex.h"
	39	#include "TH1F.h"
	40	#include "AliHLTD0toKpi.h"
9929f8f5	41	#include "AliAODVertex.h"
629b904b	42	#include "AliESDVertex.h"
3a626a12	43	#include "AliAODRecoDecay.h"
2a743e38	44	#include "AliHLTMCEvent.h"
	45	#include "AliStack.h"
	46	#include "TParticle.h"
10d746a6	47	#include "TMap.h"
5f4502cc	48
	49	/** ROOT macro for the implementation of ROOT specific class methods */
	50	ClassImp(AliHLTD0Trigger)
	51
	52	AliHLTD0Trigger::AliHLTD0Trigger()
	53	: AliHLTTrigger()
	54	, fPtMin(0.0)
	55	, fdca(0.0)
	56	, finvMass(0.0)
	57	, fcosThetaStar(0.0)
	58	, fd0(0.0)
	59	, fd0d0(0.0)
	60	, fcosPoint(0.0)
9929f8f5	61	, fplothisto(false)
9929f8f5	62	, fUseV0(false)
052f676e	63	, fD0PDG(TDatabasePDG::Instance()->GetParticle(421)->Mass())
5f4502cc	64	, fD0mass(NULL)
252bba71	65	, fD0pt(NULL)
9929f8f5	66	, fPos()
	67	, fNeg()
	68	, fd0calc(NULL)
	69	, ftwoTrackArray(NULL)
	70	, fTotalD0(0)
9f96f527	71	, fTotalD0Onetrue(0)
2a743e38	72	, fTotalD0true(0)
2a743e38	73	, fEvent(NULL)
15f6cee9	74	, fuseKF(false)
5f4502cc	75	{
9929f8f5	76
5f4502cc	77	// see header file for class documentation
	78	// or
	79	// refer to README to build package
	80	// or
	81	// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
	82
	83	}
	84
	85	const char* AliHLTD0Trigger::fgkOCDBEntry="HLT/ConfigHLT/D0Trigger";
	86
	87	AliHLTD0Trigger::~AliHLTD0Trigger()
	88	{
a7cf6e02	89
5f4502cc	90	}
9929f8f5	91
5f4502cc	92	const char* AliHLTD0Trigger::GetTriggerName() const
	93	{
	94	// see header file for class documentation
	95	return "D0Trigger";
	96	}
	97
	98	AliHLTComponent* AliHLTD0Trigger::Spawn()
	99	{
	100	// see header file for class documentation
	101	return new AliHLTD0Trigger;
	102	}
	103
	104	int AliHLTD0Trigger::DoTrigger()
	105	{
9929f8f5	106	// -- Iterator over Data Blocks --
9929f8f5	107	//const AliHLTComponentBlockData* iter = NULL;
5f4502cc	108
9929f8f5	109	if (!IsDataEvent()) return 0;
5f4502cc	110
9f96f527	111	HLTDebug("Used Cuts: pT: %f , DCA: %f , InvMass: %f , CosThetaStar: %f , d0: %f , d0xd0: %f , CosPointingAngle: %f",fPtMin,fdca,finvMass,fcosThetaStar,fd0,fd0d0,fcosPoint);
9f96f527	112
9929f8f5	113	Int_t nD0=0;
9f96f527	114	Int_t nD0Onetrue=0;
2a743e38	115	Int_t nD0true=0;
9929f8f5	116	TString description;
5f4502cc	117
2a743e38	118	for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeMCObject\|kAliHLTDataOriginHLT); iter != NULL; iter = GetNextInputObject() ) {
	119	fEvent = dynamic_cast<AliHLTMCEvent>(const_cast<TObject>( iter ) );
	120	if ( ! fEvent ) {
	121	HLTError( "No MC Event present!" );
	122	break;
	123	}
	124	}
	125
a7cf6e02	126	const AliESDVertex *Vertex=NULL;
8d9d674e	127
9929f8f5	128	for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeESDObject); iter != NULL; iter = GetNextInputObject() ) {
	129	if(fUseV0){
	130	nD0=RecV0(iter);
	131	}
	132	else{
629b904b	133	AliESDEvent event = dynamic_cast<AliESDEvent>(const_cast<TObject*>( iter ) );
629b904b	134	event->GetStdContent();
14978adc	135	Double_t field = event->GetMagneticField();
a7cf6e02	136	Vertex = event->GetPrimaryVertexTracks();
a7cf6e02	137	if(!Vertex \|\| Vertex->GetNContributors()<2){
9f96f527	138	HLTDebug("Contributors in ESD vertex to low or not been set");
3a626a12	139	continue;
3a626a12	140	}
629b904b	141	for(Int_t it=0;it<event->GetNumberOfTracks();it++){
14978adc	142	SingleTrackSelect(event->GetTrack(it),Vertex,field);
629b904b	143	}
14978adc	144	RecD0(nD0,nD0Onetrue,nD0true,Vertex,field);
5f4502cc	145	}
5f4502cc	146	}
9929f8f5	147
3a626a12	148	for ( const TObject *iter = GetFirstInputObject(kAliHLTDataTypeESDVertex\|kAliHLTDataOriginOut);
629b904b	149	iter != NULL; iter = GetNextInputObject() ) {
a7cf6e02	150	Vertex = dynamic_cast<const AliESDVertex*>(iter);
a7cf6e02	151	if(!Vertex){
3a626a12	152	HLTError("Vertex object is corrupted");
629b904b	153	//iResult = -EINVAL;
	154	}
	155	}
	156
	157	for ( const AliHLTComponentBlockData* iter = GetFirstInputBlock(kAliHLTDataTypeTrack\|kAliHLTDataOriginITS);
	158	iter != NULL; iter = GetNextInputBlock() ) {
	159	vector<AliHLTGlobalBarrelTrack> tracksVector;
	160	AliHLTGlobalBarrelTrack::ConvertTrackDataArray(reinterpret_cast<const AliHLTTracksData*>(iter->fPtr), iter->fSize, tracksVector);
	161
14978adc	162	Double_t field = GetBz();
a7cf6e02	163	if (Vertex){
a7cf6e02	164	for(UInt_t i=0;i<tracksVector.size();i++){
14978adc	165	SingleTrackSelect(&tracksVector[i],Vertex,field);
a7cf6e02	166	}
14978adc	167	RecD0(nD0,nD0Onetrue,nD0true,Vertex,field);
a7cf6e02	168	}
	169	}
	170
9929f8f5	171	fTotalD0+=nD0;
9f96f527	172	fTotalD0Onetrue += nD0Onetrue;
2a743e38	173	fTotalD0true += nD0true;
2a743e38	174
9929f8f5	175	ftwoTrackArray->Clear();
	176	fPos.clear();
	177	fNeg.clear();
629b904b	178
2a743e38	179	HLTDebug("Number of D0 found: %d",nD0);
9f96f527	180	HLTDebug("Number of D0 candidates with one track as D0 decay: %d",nD0Onetrue);
2a743e38	181	HLTDebug("Number of True D0 found: %d",nD0true);
2a743e38	182	HLTDebug("Total Number of D0 found: %d",fTotalD0);
9f96f527	183	HLTDebug("Number of D0 candidates with one track as D0 decay: %d",fTotalD0Onetrue);
2a743e38	184	HLTDebug("Total Number of True D0 found: %d",fTotalD0true);
5f4502cc	185
252bba71	186	if(fplothisto){
	187	PushBack( (TObject*) fD0mass, kAliHLTDataTypeHistogram,0);
	188	PushBack( (TObject*) fD0pt, kAliHLTDataTypeHistogram,0);
	189	}
5f4502cc	190
9929f8f5	191	//if (iResult>=0) {
9929f8f5	192	if (1) {
5f4502cc	193
	194	if (nD0>=1) {
	195	description.Form("Event contains %d D0(s)", nD0);
	196	SetDescription(description.Data());
	197	// Enable the central detectors for readout.
	198	GetReadoutList().Enable(
	199	AliHLTReadoutList::kITSSPD \|
	200	AliHLTReadoutList::kITSSDD \|
	201	AliHLTReadoutList::kITSSSD \|
	202	AliHLTReadoutList::kTPC \|
	203	AliHLTReadoutList::kTRD \|
	204	AliHLTReadoutList::kTOF \|
	205	AliHLTReadoutList::kHMPID \|
	206	AliHLTReadoutList::kPHOS
	207	);
	208	// Add the available HLT information for readout too.
	209	GetTriggerDomain().Add("CLUSTERS", "TPC ");
	210	TriggerEvent(true);
	211	return 0;
	212	}
	213	description.Form("No D0");
	214	} else {
	215	description.Form("No input blocks found");
	216	}
	217	SetDescription(description.Data());
	218	TriggerEvent(false);
9929f8f5	219	//return iResult;
9929f8f5	220	return 0;
5f4502cc	221	}
	222
	223	int AliHLTD0Trigger::DoInit(int argc, const char** argv)
	224	{
9929f8f5	225
	226	fd0calc = new AliHLTD0toKpi();
	227	ftwoTrackArray = new TObjArray(2);
	228
5f4502cc	229	fplothisto=false;
5f4502cc	230	// see header file for class documentation
9929f8f5	231	fD0mass = new TH1F("hMass","D^{0} mass plot",100,1.7,2);
252bba71	232	fD0pt = new TH1F("hPt","D^{0} Pt plot",20,0,20);
5f4502cc	233	// first configure the default
	234	int iResult=0;
	235	if (iResult>=0) iResult=ConfigureFromCDBTObjString(fgkOCDBEntry);
	236
	237	// configure from the command line parameters if specified
	238	if (iResult>=0 && argc>0)
	239	iResult=ConfigureFromArgumentString(argc, argv);
	240	return iResult;
	241	}
	242
	243	int AliHLTD0Trigger::DoDeinit()
	244	{
	245	// see header file for class documentation
a7cf6e02	246	if(fd0calc){delete fd0calc; fd0calc = NULL;}
a7cf6e02	247	if(fD0mass){delete fD0mass; fD0mass = NULL;}
925bbd08	248	if(fD0pt){delete fD0pt; fD0pt=NULL;}
925bbd08	249	if(ftwoTrackArray){delete ftwoTrackArray; ftwoTrackArray=NULL;}
a7cf6e02	250
5f4502cc	251	return 0;
	252	}
	253
	254	int AliHLTD0Trigger::Reconfigure(const char* cdbEntry, const char* /chainId/)
	255	{
	256	// see header file for class documentation
	257
	258	// configure from the specified antry or the default one
	259	const char* entry=cdbEntry;
	260	if (!entry \|\| entry[0]==0) {
	261	entry=fgkOCDBEntry;
	262	}
	263
	264	return ConfigureFromCDBTObjString(entry);
	265	}
	266
	267	int AliHLTD0Trigger::ScanConfigurationArgument(int argc, const char** argv)
	268	{
	269	// see header file for class documentation
	270	if (argc<=0) return 0;
	271	int i=0;
	272	TString argument=argv[i];
	273	// -minpt for decay
	274	if (argument.CompareTo("-pt")==0) {
	275	if (++i>=argc) return -EPROTO;
	276	argument=argv[i];
	277	fPtMin=argument.Atof();
	278	return 2;
	279	}
	280	// minimum dca for decay tracks
	281	if (argument.CompareTo("-dca")==0) {
	282	if (++i>=argc) return -EPROTO;
	283	argument=argv[i];
	284	fdca=argument.Atof();
	285	return 2;
	286	}
	287	// inv. mass half width.
	288	if (argument.CompareTo("-invmass")==0) {
	289	if (++i>=argc) return -EPROTO;
	290	argument=argv[i];
	291	finvMass=argument.Atof();
	292	return 2;
	293	}
	294
	295	// cos theta for decay angle
	296	if (argument.CompareTo("-costhetastar")==0) {
	297	if (++i>=argc) return -EPROTO;
	298	argument=argv[i];
	299	fcosThetaStar=argument.Atof();
	300	return 2;
	301	}
	302
	303	// impact parameter for decay
	304	if (argument.CompareTo("-d0")==0) {
	305	if (++i>=argc) return -EPROTO;
	306	argument=argv[i];
	307	fd0=argument.Atof();
	308	return 2;
	309	}
	310	// product of impact parameter
	311	if (argument.CompareTo("-d0d0")==0) {
	312	if (++i>=argc) return -EPROTO;
	313	argument=argv[i];
	314	fd0d0=argument.Atof();
315	return 2;
316	}
317	// product of impact parameter
318	if (argument.CompareTo("-cospoint")==0) {
319	if (++i>=argc) return -EPROTO;
320	argument=argv[i];
321	fcosPoint=argument.Atof();
322	return 2;
323	}
324	if (argument.CompareTo("-plothistogram")==0) {
5f4502cc	325	fplothisto=true;
9929f8f5	326	return 1;
	327	}
	328	if (argument.CompareTo("-usev0")==0) {
	329	fUseV0=true;
	330	return 1;
5f4502cc	331	}
15f6cee9	332	if (argument.CompareTo("-useKF")==0) {
	333	fuseKF=true;
	334	return 1;
	335	}
5f4502cc	336	// unknown argument
	337	return -EINVAL;
	338	}
9929f8f5	339
14978adc	340	void AliHLTD0Trigger::SingleTrackSelect(AliExternalTrackParam* t, const AliESDVertex* pv,Double_t field){
a7cf6e02	341	// Offline uses \|\| on the cuts of decay products
a7cf6e02	342	if (!pv) return;
8d9d674e	343
a7cf6e02	344	Double_t pvpos[3];
a7cf6e02	345	pv->GetXYZ(pvpos);
629b904b	346
9929f8f5	347	if(t->Pt()<fPtMin){return;}
14978adc	348	if(TMath::Abs(t->GetD(pvpos[0],pvpos[1],field)) > fd0){return;}
9929f8f5	349
	350	if(t->Charge()>0){
	351	fPos.push_back(t);
	352	}
	353	else{
	354	fNeg.push_back(t);
	355	}
	356	}
	357
14978adc	358	void AliHLTD0Trigger::RecD0(Int_t& nD0,Int_t& nD0Onetrue ,Int_t& nD0true,const AliESDVertex* pv,Double_t field){
a7cf6e02	359	// Default way of reconstructing D0's. Both from ESD and Barreltracks
9929f8f5	360	Double_t D0,D0bar,xdummy,ydummy;
	361	Double_t d0[2];
	362	Double_t svpos[3];
	363	Double_t pvpos[3];
	364
a7cf6e02	365	if(!pv){
629b904b	366	HLTError("No Vertex is set");
2a743e38	367	return;
9929f8f5	368	}
a7cf6e02	369	pv->GetXYZ(pvpos);
629b904b	370
	371	for(UInt_t ip=0;ip<fPos.size();ip++){
	372	AliExternalTrackParam *tP=fPos[ip];
	373	for(UInt_t in=0;in<fNeg.size();in++){
	374	AliExternalTrackParam *tN=fNeg[in];
	375
14978adc	376	tP->PropagateToDCA(pv,field,kVeryBig); //do I need this??????
14978adc	377	tN->PropagateToDCA(pv,field,kVeryBig);
9929f8f5	378
14978adc	379	Double_t dcatPtN = tP->GetDCA(tN,field,xdummy,ydummy);
9929f8f5	380	if(dcatPtN>fdca) { continue; }
9929f8f5	381
629b904b	382	ftwoTrackArray->AddAt(tP,0);
629b904b	383	ftwoTrackArray->AddAt(tN,1);
14978adc	384	AliAODVertex *vertexp1n1 = fd0calc->ReconstructSecondaryVertex(ftwoTrackArray,field,pv,fuseKF);
9929f8f5	385	if(!vertexp1n1) {
	386	ftwoTrackArray->Clear();
	387	continue;
	388	}
	389
	390	vertexp1n1->GetXYZ(svpos);
	391
14978adc	392	tP->PropagateToDCA(vertexp1n1,field,kVeryBig);
14978adc	393	tN->PropagateToDCA(vertexp1n1,field,kVeryBig);
9929f8f5	394
3a626a12	395	/*
	396	Double_t px[2],py[2],pz[2];
	397	Double_t momentum[3];
	398	tP->GetPxPyPz(momentum);
	399	px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
	400	tN->GetPxPyPz(momentum);
	401	px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
	402
	403	Short_t dummycharge=0;
	404	Double_t *dummyd0 = new Double_t[2];
	405	Int_t nprongs = 2;
	406
	407	for(Int_t ipr=0;ipr<nprongs;ipr++) dummyd0[ipr]=0.;
	408	AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
	409	delete [] dummyd0; dummyd0=NULL;
	410
	411	UInt_t pdg2[2],pdg2bar[2];
	412	Double_t mPDG,minv,minvbar;
	413
	414	pdg2[0]=211; pdg2[1]=321; pdg2bar[0]=321; pdg2bar[1]=211;
	415	minv = rd->InvMass(nprongs,pdg2);
	416	minvbar = rd->InvMass(nprongs,pdg2bar);
052f676e	417	if(TMath::Abs(minv-fD0PDG)>finvMass && TMath::Abs(minv-fD0PDG)>finvMass) {continue; delete vertexp1n1; delete rd;}
3a626a12	418	*/
052f676e	419	if((TMath::Abs(fd0calc->InvMass(tN,tP)-fD0PDG)) > finvMass && TMath::Abs((fd0calc->InvMass(tP,tN))-fD0PDG) > finvMass){continue;}
9929f8f5	420	fd0calc->cosThetaStar(tN,tP,D0,D0bar);
9929f8f5	421	if(TMath::Abs(D0) > fcosThetaStar && TMath::Abs(D0bar) > fcosThetaStar){continue;}
14978adc	422	d0[0] = tP->GetD(pvpos[0],pvpos[1],field);
14978adc	423	d0[1] = tN->GetD(pvpos[0],pvpos[1],field);
9929f8f5	424	if((d0[0]*d0[1]) > fd0d0){continue;}
	425	if(fd0calc->pointingAngle(tN,tP,pvpos,svpos) < fcosPoint){continue;}
	426
	427	if(fplothisto){
3a626a12	428	//fD0mass->Fill(minv);
	429	//fD0mass->Fill(minvbar);
	430	fD0mass->Fill(fd0calc->InvMass(tN,tP));
	431	fD0mass->Fill(fd0calc->InvMass(tP,tN));
252bba71	432	fD0pt->Fill(fd0calc->Pt(tP,tN));
3a626a12	433	/*
052f676e	434	if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass){
9929f8f5	435	fD0mass->Fill(fd0calc->InvMass(tN,tP));
	436	}
	437	else{
	438	fD0mass->Fill(fd0calc->InvMass(tP,tN));
3a626a12	439	}
3a626a12	440	*/
9929f8f5	441	}
3a626a12	442
9f96f527	443	if(CheckTrackMC(tP,tN)==2){
2a743e38	444	nD0true++;
2a743e38	445	}
9f96f527	446	if(CheckTrackMC(tP,tN)==1){
	447	nD0Onetrue++;
	448	}
2a743e38	449
9929f8f5	450	nD0++;
052f676e	451	vertexp1n1->RemoveCovMatrix();
9929f8f5	452	delete vertexp1n1;
	453	}
	454	}
9929f8f5	455	}
	456
	457	Int_t AliHLTD0Trigger::RecV0(const TObject* iter){
a7cf6e02	458	// Reconstruction D0's from the V0 found by the V0 finder
9929f8f5	459	int nD0=0;
	460	Double_t d0[2];
	461	Double_t D0,D0bar;
	462	Double_t svpos[3];
	463	Double_t pvpos[3];
	464
	465	AliESDEvent event = dynamic_cast<AliESDEvent>(const_cast<TObject*>( iter ) );
	466	event->GetStdContent();
	467	Int_t nV0 = event->GetNumberOfV0s();
	468	Double_t field = event->GetMagneticField();
	469	const AliESDVertex* pv = event->GetPrimaryVertexTracks();
	470	pv->GetXYZ(pvpos);
	471
	472	for (Int_t iv=0; iv<nV0; iv++) {
	473
	474	AliESDtrack *tN=event->GetTrack( event->GetV0(iv)->GetNindex());
	475	AliESDtrack *tP=event->GetTrack( event->GetV0(iv)->GetPindex());
	476
	477	if(tN->Pt()<fPtMin && tP->Pt()<fPtMin){continue;} //\|\|????
	478
	479	d0[0] = tP->GetD(pvpos[0],pvpos[1],field);
	480	d0[1] = tN->GetD(pvpos[0],pvpos[1],field);
	481
	482	if(d0[0]>fd0 && d0[0]>fd0){continue;} // make sure < or>
	483
	484	event->GetV0(iv)->GetXYZ(svpos[0],svpos[1],svpos[2]);
	485
	486	if(!tN->PropagateTo(svpos[0],field) && !tP->PropagateTo(svpos[0],field)){
	487	HLTInfo("Tracks could not be propagated to secondary vertex");
	488	continue;
	489	}
	490
	491	Double_t tmp1, tmp2;
	492	if(tN->GetDCA(tP,field,tmp1,tmp2) > fdca){continue;}
	493
052f676e	494	if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass && (fd0calc->InvMass(tP,tN) - fD0PDG) > finvMass){continue;}
9929f8f5	495	fd0calc->cosThetaStar(tN,tP,D0,D0bar);
	496	if(D0 > fcosThetaStar && D0bar > fcosThetaStar){continue;}
	497	if((d0[0]*d0[1]) > fd0d0){continue;}
	498	if(fd0calc->pointingAngle(tN,tP,pvpos,svpos) < fcosPoint){continue;}
	499
	500	nD0++;
052f676e	501	if((fd0calc->InvMass(tN,tP) - fD0PDG) > finvMass){
9929f8f5	502	fD0mass->Fill(fd0calc->InvMass(tN,tP));
	503	}
	504	else{
	505	fD0mass->Fill(fd0calc->InvMass(tP,tN));
	506	}
	507	}
	508	return nD0;
	509
	510	}
9f96f527	511	int AliHLTD0Trigger::CheckTrackMC(AliExternalTrackParam* pt, AliExternalTrackParam* pn){
a7cf6e02	512	// Checks if decay products both came from a D0 or one.
9f96f527	513	if(!fEvent){return 0;}
2a743e38	514
	515	int lP = pt->GetLabel();
	516	int lN = pn->GetLabel();
	517
	518	if(lN>=0 && lP>=0){
	519
	520	int imP = (fEvent->Particle(lP))->GetFirstMother();
	521	int imN = (fEvent->Particle(lN))->GetFirstMother();
	522
	523	if(imP>=0 && imN>=0){
	524	TParticle * mP = fEvent->Particle(imP);
	525	TParticle * mN = fEvent->Particle(imN);
dd2e5959	526	if((fabs(mP->GetPdgCode())==421 && fabs(mN->GetPdgCode())==421) && imP == imN){
9f96f527	527	return 2;
9f96f527	528	}
dd2e5959	529	if((fabs(mP->GetPdgCode())==421 \|\| fabs(mN->GetPdgCode())==421) && imP == imN){
9f96f527	530	return 1;
2a743e38	531	}
	532	}
	533	}
9f96f527	534	return 0;
2a743e38	535	}
10d746a6	536	void AliHLTD0Trigger::GetOCDBObjectDescription( TMap* const targetMap)
	537	{
	538	// Get a list of OCDB object description.
	539	if (!targetMap) return;
	540	targetMap->Add(new TObjString("HLT/ConfigHLT/D0Trigger"),new TObjString("Object with default cuts for D0 reconstruction" ));
	541	}