[u/mrichter/AliRoot.git] / ANALYSIS / AliAnalysisTaskMCParticleFilter.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * 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.                  *
 **************************************************************************/

//
//  Analysis task for Kinematic filtering
//  Fill AODtrackMC tracks from Kinematic stack
//
 
#include <TChain.h>
#include <TFile.h>
#include "TParticle.h"
#include "TParameter.h"
#include "TString.h"
#include "TList.h"
#include "TProfile.h"
#include "TH1F.h"


#include "AliAnalysisTaskMCParticleFilter.h"
#include "AliAnalysisManager.h"
#include "AliAnalysisFilter.h"
#include "AliHeader.h"
#include "AliStack.h"
#include "AliMCEvent.h"
#include "AliMCEventHandler.h"
#include "AliAODEvent.h"
#include "AliAODHeader.h"
#include "AliAODMCHeader.h"
#include "AliAODHandler.h"
#include "AliAODVertex.h"
#include "AliAODMCParticle.h"
#include "AliCollisionGeometry.h"
#include "AliGenCocktailEventHeader.h"

#include "AliLog.h"

ClassImp(AliAnalysisTaskMCParticleFilter)

////////////////////////////////////////////////////////////////////////

//____________________________________________________________________
AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter():
AliAnalysisTaskSE(),
  fTrackFilterMother(0x0),
  fHistList(0x0)
{
  // Default constructor
}

Bool_t AliAnalysisTaskMCParticleFilter::Notify()
{
  //
  // Implemented Notify() to read the cross sections
  // and number of trials from pyxsec.root
  // 
  TTree *tree = AliAnalysisManager::GetAnalysisManager()->GetTree();
  Double_t xsection = 0;
  UInt_t   ntrials  = 0;
  if(tree){
    TFile *curfile = tree->GetCurrentFile();
    if (!curfile) {
      Error("Notify","No current file");
      return kFALSE;
    }

    TString fileName(curfile->GetName());
    if(fileName.Contains("AliESDs.root")){
        fileName.ReplaceAll("AliESDs.root", "pyxsec.root");
    }
    else if(fileName.Contains("AliAOD.root")){
        fileName.ReplaceAll("AliAOD.root", "pyxsec.root");
    }
    else if(fileName.Contains("galice.root")){
        // for running with galice and kinematics alone...                      
        fileName.ReplaceAll("galice.root", "pyxsec.root");
    }


    TFile *fxsec = TFile::Open(fileName.Data());
    if(!fxsec){
      AliInfo(Form("%s:%d %s not found in the Input",(char*)__FILE__,__LINE__,fileName.Data()));
      // not a severe condition we just do not have the information...
      return kTRUE;
    }
    TTree *xtree = (TTree*)fxsec->Get("Xsection");
    if(!xtree){
      Printf("%s:%d tree not found in the pyxsec.root",(char*)__FILE__,__LINE__);
      return kTRUE;
    }
    xtree->SetBranchAddress("xsection",&xsection);
    xtree->SetBranchAddress("ntrials",&ntrials);
    xtree->GetEntry(0);
    ((TProfile*)(fHistList->FindObject("h1Xsec")))->Fill("<#sigma>",xsection);
    ((TH1F*)(fHistList->FindObject("h1Trials")))->Fill("#sum{ntrials}",ntrials); 

  }
  return kTRUE;
}


//____________________________________________________________________
AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const char* name):
    AliAnalysisTaskSE(name),
    fTrackFilterMother(0x0),
    fHistList(0x0)
{
  // Default constructor
  DefineOutput(1,TList::Class());  
}

/*
//____________________________________________________________________
AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const AliAnalysisTaskMCParticleFilter& obj):
    AliAnalysisTaskSE(obj),
    fTrackFilterMother(obj.fTrackFilterMother)
{
  // Copy constructor
}
*/
//____________________________________________________________________
AliAnalysisTaskMCParticleFilter::~AliAnalysisTaskMCParticleFilter()
{
  //  if( fTrackFilterMother ) delete fTrackFilterMother;
}

/*
//____________________________________________________________________
AliAnalysisTaskMCParticleFilter& AliAnalysisTaskMCParticleFilter::operator=(const AliAnalysisTaskMCParticleFilter& other)
{
// Assignment
  if(this!=&other) {
    AliAnalysisTaskSE::operator=(other);
    fTrackFilterMother = other.fTrackFilterMother;
  }
  return *this;
}
*/
//____________________________________________________________________
void AliAnalysisTaskMCParticleFilter::UserCreateOutputObjects()
{
  // Create the output container
    if (OutputTree()&&fTrackFilterMother) 
	OutputTree()->GetUserInfo()->Add(fTrackFilterMother);

    // this part is mainly needed to set the MCEventHandler
    // to the AODHandler, this will not be needed when
    // AODHandler goes to ANALYSISalice
    // setting in the steering macro will not work on proof :(
    // so we have to do it in a task

    // the branch booking can also go into the AODHandler then


    // mcparticles
    TClonesArray *tca = new TClonesArray("AliAODMCParticle", 0);
    tca->SetName(AliAODMCParticle::StdBranchName());
    AddAODBranch("TClonesArray",&tca);

    // MC header...
    AliAODMCHeader *mcHeader = new AliAODMCHeader();
    mcHeader->SetName(AliAODMCHeader::StdBranchName());
    AddAODBranch("AliAODMCHeader",&mcHeader);    

    
    AliMCEventHandler *mcH = (AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler()); 
    AliAODHandler *aodH = dynamic_cast<AliAODHandler*> ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
    if(!aodH){
      Printf("%s:&d Could not get AODHandler",(char*)__FILE__,__LINE__);
      return;
    }
    aodH->SetMCEventHandler(mcH);


    // these are histograms, for averaging and summing
    // do it via histograms to be PROOF-proof
    // which merges the results from different workers
    // histos are not saved reside only in memory
    
    
    fHistList = new TList();
    TProfile *h1Xsec = new TProfile("h1Xsec","xsec from pyxsec.root",1,0,1);
    h1Xsec->GetXaxis()->SetBinLabel(1,"<#sigma>");
    fHistList->Add(h1Xsec);
    TH1F* h1Trials = new TH1F("h1Trials","trials from pyxsec.root",1,0,1);
    h1Trials->GetXaxis()->SetBinLabel(1,"#sum{ntrials}");
    fHistList->Add(h1Trials);

    
}

//____________________________________________________________________
void AliAnalysisTaskMCParticleFilter::UserExec(Option_t */*option*/)
{
// Execute analysis for current event
//

// Fill AOD tracks from Kinematic stack
    
  // get AliAOD Event 
  AliAODEvent* aod = AODEvent();
  if (!aod) {
      AliWarning("No Output Handler connected, doing nothing !") ;
      return;
  }

  AliMCEventHandler *mcH = (AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler()); 
  if(!mcH){ 
    AliWarning("No MC handler Found");
    return;
  }


  // fetch the output 
  // Fill control histos

  // tmp array for holding the mctracks
  // need to set mother and duagther __before__
  // filling in the tree

  AliMCEvent *mcE = MCEvent();

  if(!mcE){
    AliWarning("No MC event Found");
    return;
  }

  Int_t np    = mcE->GetNumberOfTracks();
  Int_t nprim = mcE->GetNumberOfPrimaries();
  // TODO ADD MC VERTEX

  AliAODMCHeader *aodMCHo = (AliAODMCHeader *) aod->FindListObject("mcHeader");
  // Get the proper MC Collision Geometry
  AliGenEventHeader* mcEH = mcE->GenEventHeader();
  AliCollisionGeometry *colG = dynamic_cast<AliCollisionGeometry *>(mcEH);

  if (!colG) {
    AliGenCocktailEventHeader *ccEH = dynamic_cast<AliGenCocktailEventHeader *>(mcEH);
    if (ccEH) {
      TList *genHeaders = ccEH->GetHeaders();
      for (int imch=0; imch<genHeaders->GetEntries(); imch++) {
	colG = dynamic_cast<AliCollisionGeometry *>(genHeaders->At(imch));
	if (colG) break;
      }
    }
  }

  if (colG) {
    aodMCHo->SetReactionPlaneAngle(colG->ReactionPlaneAngle());
    printf("Found Collision Geometry. Got Reaction Plane %lf\n", colG->ReactionPlaneAngle());
  }


  // check varibales for charm need all daughters
  static int  iTaken = 0;
  static int  iAll = 0;
  static int  iCharm = 0;


  Int_t j=0;
  for (Int_t ip = 0; ip < np; ip++){
    AliMCParticle* mcpart = (AliMCParticle*) mcE->GetTrack(ip);
    TParticle* part = mcpart->Particle();
    Float_t xv = part->Vx();
    Float_t yv = part->Vy();
    Float_t zv = part->Vz();
    Float_t rv = TMath::Sqrt(xv * xv + yv * yv);
      
    Bool_t write = kFALSE;
    
    if (ip < nprim) {
      // Select the primary event
      write = kTRUE;
    } else if (part->GetUniqueID() == 4) {
      // Particles from decay
      // Check that the decay chain ends at a primary particle
      AliMCParticle* mother = mcpart;
      Int_t imo = mcpart->GetMother();
      while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
	mother =  (AliMCParticle*) mcE->GetTrack(imo);
	imo =  mother->GetMother();
      }
      // Select according to pseudorapidity and production point of primary ancestor
      if (imo < nprim && Select(((AliMCParticle*) mcE->GetTrack(imo))->Particle(), rv, zv))write = kTRUE;         
    } else if (part->GetUniqueID() == 5) {
      // Now look for pair production
      Int_t imo = mcpart->GetMother();
      if (imo < nprim) {
	// Select, if the gamma is a primary
	write = kTRUE;
      } else {
	// Check if the gamma comes from the decay chain of a primary particle
	AliMCParticle* mother =  (AliMCParticle*) mcE->GetTrack(imo);
	imo = mother->GetMother();
	while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
	  mother =   (AliMCParticle*) mcE->GetTrack(imo);
	  imo =  mother->GetMother();
	}
	// Select according to pseudorapidity and production point 
	if (imo < nprim && Select(mother->Particle(), rv, zv)) 
	  write = kTRUE;
      }
    }
    /*
    else if (part->GetUniqueID() == 13){
      // Evaporation
      // Check that we end at a primary particle
      TParticle* mother = part;
      Int_t imo = part->GetFirstMother();
      while((imo >= nprim) && ((mother->GetUniqueID() == 4 ) || ( mother->GetUniqueID() == 13))) {
	mother =  mcE->Stack()->Particle(imo);
	imo =  mother->GetFirstMother();
      }
      // Select according to pseudorapidity and production point 
	if (imo < nprim && Select(mother, rv, zv)) 
	  write = kTRUE;
    }
    */    
    if (write) {
      if(mcH)mcH->SelectParticle(ip);
      j++;
      
      // debug info to check fro charm daugthers
      if((TMath::Abs(part->GetPdgCode()))==411){
	iCharm++;
	Int_t d0 =  mcpart->GetFirstDaughter();
	Int_t d1 =  mcpart->GetLastDaughter();
	if(d0>0&&d1>0){
	  for(int id = d0;id <= d1;id++){
	    iAll++;
	    if(mcH->IsParticleSelected(id))iTaken++;
	  }
	}
      }// if charm
    }
  }

  AliInfo(Form("Taken daughters %d/%d of %d charm",iTaken,iAll,iCharm));

  PostData(1,fHistList);

  return;
}

void AliAnalysisTaskMCParticleFilter::Terminate(Option_t */*option*/){
  //
  // Terminate the execution save the PYTHIA x_section to the UserInfo()
  //


  TTree *tree = (TTree*)GetOutputData(0);
  fHistList = (TList*)GetOutputData(1);
  if(!fHistList){
    Printf("%s:%d Output list not found",(char*)__FILE__,__LINE__);
    return;
  }

  if(!tree){
    Printf("%s:%d Output tree not found",(char*)__FILE__,__LINE__);
    return;
  }

  TProfile *hXsec = ((TProfile*)(fHistList->FindObject("h1Xsec")));
  TH1F* hTrials  = ((TH1F*)(fHistList->FindObject("h1Trials")));
  if(!hXsec)return;
  if(!hTrials)return;

  Float_t xsec = hXsec->GetBinContent(1);
  Float_t trials = hTrials->Integral();
  AliInfo(Form("Average -section %.4E and total number of trials %E",xsec,trials));
  
  // This only works if the tree is not a special output
  // in this case it is already written
  /*
  TParameter<float> *x = new TParameter<float>("xsection",xsec);
  tree->GetUserInfo()->Add(x);
  TParameter<float> *t = new TParameter<float>("trials",trials);
  tree->GetUserInfo()->Add(t);
  */
  

}

Bool_t AliAnalysisTaskMCParticleFilter::Select(TParticle* part, Float_t rv, Float_t zv)
{
  // Selection accoring to eta of the mother and production point
  // This has to be refined !!!!!!

  // Esp if we don't have collisison in the central barrel but e.g. beam gas
  //  return kTRUE;

  Float_t eta = part->Eta();

  // central barrel consider everything in the ITS...
  // large eta window for smeared vertex and SPD acceptance (2 at z = 0)
  // larger for V0s in the TPC
  //  if (TMath::Abs(eta) < 2.5 && rv < 250. && TMath::Abs(zv)<255)return kTRUE;

  if (TMath::Abs(eta) < 2.5 && rv < 170)return kTRUE;   

  // Andreas' Cuts
  //  if (TMath::Abs(eta) < 1. && rv < 170)return kTRUE;   


  // Muon arm
  if(eta > -4.2 && eta < -2.3 && zv > -500.)return kTRUE; // Muon arms

  // PMD acceptance 2.3 <= eta < = 3.5
  //  if(eta>2.0&&eta<3.7)return kTRUE; 

  return kFALSE;
 
}
Commit	Line	Data
da97a08a	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	//
	17	// Analysis task for Kinematic filtering
	18	// Fill AODtrackMC tracks from Kinematic stack
	19	//
	20
	21	#include <TChain.h>
	22	#include <TFile.h>
	23	#include "TParticle.h"
a3b51fd2	24	#include "TParameter.h"
da97a08a	25	#include "TString.h"
a3b51fd2	26	#include "TList.h"
	27	#include "TProfile.h"
	28	#include "TH1F.h"
	29
da97a08a	30
	31	#include "AliAnalysisTaskMCParticleFilter.h"
	32	#include "AliAnalysisManager.h"
	33	#include "AliAnalysisFilter.h"
	34	#include "AliHeader.h"
	35	#include "AliStack.h"
	36	#include "AliMCEvent.h"
	37	#include "AliMCEventHandler.h"
	38	#include "AliAODEvent.h"
	39	#include "AliAODHeader.h"
dce1b636	40	#include "AliAODMCHeader.h"
da97a08a	41	#include "AliAODHandler.h"
	42	#include "AliAODVertex.h"
	43	#include "AliAODMCParticle.h"
e988332e	44	#include "AliCollisionGeometry.h"
e988332e	45	#include "AliGenCocktailEventHeader.h"
da97a08a	46
	47	#include "AliLog.h"
	48
	49	ClassImp(AliAnalysisTaskMCParticleFilter)
	50
	51	////////////////////////////////////////////////////////////////////////
	52
	53	//____________________________________________________________________
	54	AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter():
	55	AliAnalysisTaskSE(),
a3b51fd2	56	fTrackFilterMother(0x0),
a3b51fd2	57	fHistList(0x0)
da97a08a	58	{
	59	// Default constructor
	60	}
	61
a3b51fd2	62	Bool_t AliAnalysisTaskMCParticleFilter::Notify()
	63	{
	64	//
	65	// Implemented Notify() to read the cross sections
	66	// and number of trials from pyxsec.root
	67	//
	68	TTree *tree = AliAnalysisManager::GetAnalysisManager()->GetTree();
	69	Double_t xsection = 0;
	70	UInt_t ntrials = 0;
	71	if(tree){
	72	TFile *curfile = tree->GetCurrentFile();
	73	if (!curfile) {
	74	Error("Notify","No current file");
	75	return kFALSE;
	76	}
	77
	78	TString fileName(curfile->GetName());
	79	if(fileName.Contains("AliESDs.root")){
	80	fileName.ReplaceAll("AliESDs.root", "pyxsec.root");
	81	}
	82	else if(fileName.Contains("AliAOD.root")){
	83	fileName.ReplaceAll("AliAOD.root", "pyxsec.root");
	84	}
	85	else if(fileName.Contains("galice.root")){
	86	// for running with galice and kinematics alone...
	87	fileName.ReplaceAll("galice.root", "pyxsec.root");
	88	}
	89
	90
	91	TFile *fxsec = TFile::Open(fileName.Data());
	92	if(!fxsec){
	93	AliInfo(Form("%s:%d %s not found in the Input",(char*)__FILE__,__LINE__,fileName.Data()));
	94	// not a severe condition we just do not have the information...
	95	return kTRUE;
	96	}
	97	TTree xtree = (TTree)fxsec->Get("Xsection");
	98	if(!xtree){
	99	Printf("%s:%d tree not found in the pyxsec.root",(char*)__FILE__,__LINE__);
	100	return kTRUE;
	101	}
	102	xtree->SetBranchAddress("xsection",&xsection);
	103	xtree->SetBranchAddress("ntrials",&ntrials);
	104	xtree->GetEntry(0);
	105	((TProfile*)(fHistList->FindObject("h1Xsec")))->Fill("<#sigma>",xsection);
	106	((TH1F*)(fHistList->FindObject("h1Trials")))->Fill("#sum{ntrials}",ntrials);
	107
	108	}
	109	return kTRUE;
	110	}
	111
	112
	113
da97a08a	114	//____________________________________________________________________
	115	AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const char* name):
	116	AliAnalysisTaskSE(name),
a3b51fd2	117	fTrackFilterMother(0x0),
a3b51fd2	118	fHistList(0x0)
da97a08a	119	{
da97a08a	120	// Default constructor
a3b51fd2	121	DefineOutput(1,TList::Class());
da97a08a	122	}
da97a08a	123
a3b51fd2	124	/*
da97a08a	125	//____________________________________________________________________
	126	AliAnalysisTaskMCParticleFilter::AliAnalysisTaskMCParticleFilter(const AliAnalysisTaskMCParticleFilter& obj):
	127	AliAnalysisTaskSE(obj),
	128	fTrackFilterMother(obj.fTrackFilterMother)
	129	{
	130	// Copy constructor
	131	}
a3b51fd2	132	*/
da97a08a	133	//____________________________________________________________________
	134	AliAnalysisTaskMCParticleFilter::~AliAnalysisTaskMCParticleFilter()
	135	{
	136	// if( fTrackFilterMother ) delete fTrackFilterMother;
	137	}
	138
a3b51fd2	139	/*
da97a08a	140	//____________________________________________________________________
	141	AliAnalysisTaskMCParticleFilter& AliAnalysisTaskMCParticleFilter::operator=(const AliAnalysisTaskMCParticleFilter& other)
	142	{
	143	// Assignment
	144	if(this!=&other) {
	145	AliAnalysisTaskSE::operator=(other);
	146	fTrackFilterMother = other.fTrackFilterMother;
	147	}
	148	return *this;
	149	}
a3b51fd2	150	*/
da97a08a	151	//____________________________________________________________________
	152	void AliAnalysisTaskMCParticleFilter::UserCreateOutputObjects()
	153	{
	154	// Create the output container
	155	if (OutputTree()&&fTrackFilterMother)
	156	OutputTree()->GetUserInfo()->Add(fTrackFilterMother);
d2740fba	157
	158	// this part is mainly needed to set the MCEventHandler
	159	// to the AODHandler, this will not be needed when
	160	// AODHandler goes to ANALYSISalice
	161	// setting in the steering macro will not work on proof :(
	162	// so we have to do it in a task
	163
	164	// the branch booking can also go into the AODHandler then
	165
dce1b636	166
dce1b636	167	// mcparticles
da97a08a	168	TClonesArray *tca = new TClonesArray("AliAODMCParticle", 0);
	169	tca->SetName(AliAODMCParticle::StdBranchName());
	170	AddAODBranch("TClonesArray",&tca);
da97a08a	171
dce1b636	172	// MC header...
dce1b636	173	AliAODMCHeader *mcHeader = new AliAODMCHeader();
dce1b636	174	mcHeader->SetName(AliAODMCHeader::StdBranchName());
	175	AddAODBranch("AliAODMCHeader",&mcHeader);
	176
	177
	178
	179	AliMCEventHandler mcH = (AliMCEventHandler) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
da97a08a	180	AliAODHandler aodH = dynamic_cast<AliAODHandler> ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
	181	if(!aodH){
	182	Printf("%s:&d Could not get AODHandler",(char*)__FILE__,__LINE__);
	183	return;
	184	}
	185	aodH->SetMCEventHandler(mcH);
dce1b636	186
a3b51fd2	187
	188	// these are histograms, for averaging and summing
	189	// do it via histograms to be PROOF-proof
	190	// which merges the results from different workers
	191	// histos are not saved reside only in memory
	192
	193
	194
	195	fHistList = new TList();
	196	TProfile *h1Xsec = new TProfile("h1Xsec","xsec from pyxsec.root",1,0,1);
	197	h1Xsec->GetXaxis()->SetBinLabel(1,"<#sigma>");
	198	fHistList->Add(h1Xsec);
	199	TH1F* h1Trials = new TH1F("h1Trials","trials from pyxsec.root",1,0,1);
	200	h1Trials->GetXaxis()->SetBinLabel(1,"#sum{ntrials}");
	201	fHistList->Add(h1Trials);
	202
da97a08a	203
	204	}
	205
	206	//____________________________________________________________________
	207	void AliAnalysisTaskMCParticleFilter::UserExec(Option_t /option*/)
	208	{
	209	// Execute analysis for current event
	210	//
	211
	212	// Fill AOD tracks from Kinematic stack
	213
	214	// get AliAOD Event
	215	AliAODEvent* aod = AODEvent();
	216	if (!aod) {
	217	AliWarning("No Output Handler connected, doing nothing !") ;
	218	return;
	219	}
	220
	221	AliMCEventHandler mcH = (AliMCEventHandler) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
	222	if(!mcH){
	223	AliWarning("No MC handler Found");
	224	return;
	225	}
	226
	227
	228	// fetch the output
	229	// Fill control histos
	230
	231	// tmp array for holding the mctracks
	232	// need to set mother and duagther __before__
	233	// filling in the tree
	234
	235	AliMCEvent *mcE = MCEvent();
	236
	237	if(!mcE){
	238	AliWarning("No MC event Found");
	239	return;
	240	}
	241
da97a08a	242	Int_t np = mcE->GetNumberOfTracks();
93836e1b	243	Int_t nprim = mcE->GetNumberOfPrimaries();
da97a08a	244	// TODO ADD MC VERTEX
e988332e	245
e988332e	246	AliAODMCHeader aodMCHo = (AliAODMCHeader ) aod->FindListObject("mcHeader");
e988332e	247	// Get the proper MC Collision Geometry
	248	AliGenEventHeader* mcEH = mcE->GenEventHeader();
	249	AliCollisionGeometry colG = dynamic_cast<AliCollisionGeometry >(mcEH);
	250
	251	if (!colG) {
	252	AliGenCocktailEventHeader ccEH = dynamic_cast<AliGenCocktailEventHeader >(mcEH);
	253	if (ccEH) {
	254	TList *genHeaders = ccEH->GetHeaders();
	255	for (int imch=0; imch<genHeaders->GetEntries(); imch++) {
	256	colG = dynamic_cast<AliCollisionGeometry *>(genHeaders->At(imch));
	257	if (colG) break;
	258	}
	259	}
	260	}
	261
	262	if (colG) {
	263	aodMCHo->SetReactionPlaneAngle(colG->ReactionPlaneAngle());
	264	printf("Found Collision Geometry. Got Reaction Plane %lf\n", colG->ReactionPlaneAngle());
	265	}
	266
de514cf0	267
	268
	269	// check varibales for charm need all daughters
	270	static int iTaken = 0;
	271	static int iAll = 0;
	272	static int iCharm = 0;
da97a08a	273
da97a08a	274
da97a08a	275	Int_t j=0;
da97a08a	276	for (Int_t ip = 0; ip < np; ip++){
7aad0c47	277	AliMCParticle* mcpart = (AliMCParticle*) mcE->GetTrack(ip);
da97a08a	278	TParticle* part = mcpart->Particle();
da97a08a	279	Float_t xv = part->Vx();
	280	Float_t yv = part->Vy();
	281	Float_t zv = part->Vz();
	282	Float_t rv = TMath::Sqrt(xv * xv + yv * yv);
	283
	284	Bool_t write = kFALSE;
63892dd0	285
da97a08a	286	if (ip < nprim) {
	287	// Select the primary event
	288	write = kTRUE;
	289	} else if (part->GetUniqueID() == 4) {
	290	// Particles from decay
	291	// Check that the decay chain ends at a primary particle
93836e1b	292	AliMCParticle* mother = mcpart;
93836e1b	293	Int_t imo = mcpart->GetMother();
da97a08a	294	while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
7aad0c47	295	mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b	296	imo = mother->GetMother();
da97a08a	297	}
63892dd0	298	// Select according to pseudorapidity and production point of primary ancestor
7aad0c47	299	if (imo < nprim && Select(((AliMCParticle*) mcE->GetTrack(imo))->Particle(), rv, zv))write = kTRUE;
da97a08a	300	} else if (part->GetUniqueID() == 5) {
da97a08a	301	// Now look for pair production
93836e1b	302	Int_t imo = mcpart->GetMother();
da97a08a	303	if (imo < nprim) {
	304	// Select, if the gamma is a primary
	305	write = kTRUE;
	306	} else {
	307	// Check if the gamma comes from the decay chain of a primary particle
7aad0c47	308	AliMCParticle* mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b	309	imo = mother->GetMother();
da97a08a	310	while((imo >= nprim) && (mother->GetUniqueID() == 4)) {
7aad0c47	311	mother = (AliMCParticle*) mcE->GetTrack(imo);
93836e1b	312	imo = mother->GetMother();
da97a08a	313	}
da97a08a	314	// Select according to pseudorapidity and production point
93836e1b	315	if (imo < nprim && Select(mother->Particle(), rv, zv))
da97a08a	316	write = kTRUE;
	317	}
	318	}
	319	/*
	320	else if (part->GetUniqueID() == 13){
	321	// Evaporation
	322	// Check that we end at a primary particle
	323	TParticle* mother = part;
	324	Int_t imo = part->GetFirstMother();
	325	while((imo >= nprim) && ((mother->GetUniqueID() == 4 ) \|\| ( mother->GetUniqueID() == 13))) {
	326	mother = mcE->Stack()->Particle(imo);
	327	imo = mother->GetFirstMother();
	328	}
	329	// Select according to pseudorapidity and production point
	330	if (imo < nprim && Select(mother, rv, zv))
	331	write = kTRUE;
	332	}
	333	*/
	334	if (write) {
	335	if(mcH)mcH->SelectParticle(ip);
	336	j++;
de514cf0	337
	338	// debug info to check fro charm daugthers
	339	if((TMath::Abs(part->GetPdgCode()))==411){
	340	iCharm++;
	341	Int_t d0 = mcpart->GetFirstDaughter();
	342	Int_t d1 = mcpart->GetLastDaughter();
	343	if(d0>0&&d1>0){
	344	for(int id = d0;id <= d1;id++){
	345	iAll++;
	346	if(mcH->IsParticleSelected(id))iTaken++;
	347	}
63892dd0	348	}
de514cf0	349	}// if charm
63892dd0	350	}
63892dd0	351	}
a3c57861	352
a3c57861	353	AliInfo(Form("Taken daughters %d/%d of %d charm",iTaken,iAll,iCharm));
63892dd0	354
a3b51fd2	355	PostData(1,fHistList);
63892dd0	356
da97a08a	357	return;
	358	}
	359
a3b51fd2	360	void AliAnalysisTaskMCParticleFilter::Terminate(Option_t /option*/){
	361	//
	362	// Terminate the execution save the PYTHIA x_section to the UserInfo()
	363	//
	364
	365
	366	TTree tree = (TTree)GetOutputData(0);
	367	fHistList = (TList*)GetOutputData(1);
	368	if(!fHistList){
	369	Printf("%s:%d Output list not found",(char*)__FILE__,__LINE__);
	370	return;
	371	}
	372
	373	if(!tree){
	374	Printf("%s:%d Output tree not found",(char*)__FILE__,__LINE__);
	375	return;
	376	}
	377
	378	TProfile hXsec = ((TProfile)(fHistList->FindObject("h1Xsec")));
	379	TH1F* hTrials = ((TH1F*)(fHistList->FindObject("h1Trials")));
	380	if(!hXsec)return;
	381	if(!hTrials)return;
	382
	383	Float_t xsec = hXsec->GetBinContent(1);
	384	Float_t trials = hTrials->Integral();
	385	AliInfo(Form("Average -section %.4E and total number of trials %E",xsec,trials));
	386
	387	// This only works if the tree is not a special output
	388	// in this case it is already written
	389	/*
	390	TParameter<float> *x = new TParameter<float>("xsection",xsec);
	391	tree->GetUserInfo()->Add(x);
	392	TParameter<float> *t = new TParameter<float>("trials",trials);
	393	tree->GetUserInfo()->Add(t);
	394	*/
	395
	396
	397	}
	398
da97a08a	399	Bool_t AliAnalysisTaskMCParticleFilter::Select(TParticle* part, Float_t rv, Float_t zv)
	400	{
	401	// Selection accoring to eta of the mother and production point
	402	// This has to be refined !!!!!!
	403
	404	// Esp if we don't have collisison in the central barrel but e.g. beam gas
	405	// return kTRUE;
	406
	407	Float_t eta = part->Eta();
	408
	409	// central barrel consider everything in the ITS...
	410	// large eta window for smeared vertex and SPD acceptance (2 at z = 0)
	411	// larger for V0s in the TPC
	412	// if (TMath::Abs(eta) < 2.5 && rv < 250. && TMath::Abs(zv)<255)return kTRUE;
	413
63892dd0	414	if (TMath::Abs(eta) < 2.5 && rv < 170)return kTRUE;
63892dd0	415
da97a08a	416	// Andreas' Cuts
63892dd0	417	// if (TMath::Abs(eta) < 1. && rv < 170)return kTRUE;
	418
	419
da97a08a	420
	421	// Muon arm
	422	if(eta > -4.2 && eta < -2.3 && zv > -500.)return kTRUE; // Muon arms
	423
	424	// PMD acceptance 2.3 <= eta < = 3.5
	425	// if(eta>2.0&&eta<3.7)return kTRUE;
	426
	427	return kFALSE;
	428
	429	}
	430