[u/mrichter/AliRoot.git] / PWG2 / FEMTOSCOPY / AliFemto / AliFemtoLikeSignAnalysis.cxx

///////////////////////////////////////////////////////////////////////////
//                                                                       //
// This is an analysis which calculated the background from like sign    //
// pairs in the same event                                               //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

#include "AliFemtoLikeSignAnalysis.h"
#include "AliFemtoParticleCollection.h"
#include "AliFemtoPicoEventCollectionVector.h"
#include "AliFemtoPicoEventCollectionVectorHideAway.h"

#ifdef __ROOT__ 
ClassImp(AliFemtoLikeSignAnalysis)
#endif

// this little function used to apply ParticleCuts (TrackCuts or V0Cuts) and fill ParticleCollections of picoEvent
//  it is called from AliFemtoSimpleAnalysis::ProcessEvent()


extern void FillHbtParticleCollection(AliFemtoParticleCut*         partCut,
				     AliFemtoEvent*               hbtEvent,
				     AliFemtoParticleCollection*  partCollection);

 
//____________________________
AliFemtoLikeSignAnalysis::AliFemtoLikeSignAnalysis(unsigned int bins, double min, double max) : 
  AliFemtoSimpleAnalysis(),
  fVertexBins(0),
  fOverFlow(0),  
  fUnderFlow(0)  
{
  // standard constructor
  fVertexBins = bins;
  fVertexZ[0] = min;
  fVertexZ[1] = max;
  fUnderFlow = 0; 
  fOverFlow = 0; 
  if (fMixingBuffer) delete fMixingBuffer;
  fPicoEventCollectionVectorHideAway = new AliFemtoPicoEventCollectionVectorHideAway(fVertexBins,fVertexZ[0],fVertexZ[1]);
    /* no-op */
}
//____________________________
AliFemtoLikeSignAnalysis::AliFemtoLikeSignAnalysis(const AliFemtoLikeSignAnalysis& a) : 
  AliFemtoSimpleAnalysis(a) ,
  fVertexBins(0),
  fOverFlow(0),  
  fUnderFlow(0)  
{
  // copy constructor
  fVertexBins = a.fVertexBins; 
  fVertexZ[0] = a.fVertexZ[0]; 
  fVertexZ[1] = a.fVertexZ[1];
  fUnderFlow = 0; 
  fOverFlow = 0; 
  if (fMixingBuffer) delete fMixingBuffer;
  fPicoEventCollectionVectorHideAway = new AliFemtoPicoEventCollectionVectorHideAway(fVertexBins,fVertexZ[0],fVertexZ[1]);
 }
//____________________________ 
AliFemtoLikeSignAnalysis::~AliFemtoLikeSignAnalysis(){
  // destructor
  delete fPicoEventCollectionVectorHideAway; fPicoEventCollectionVectorHideAway=0;
}
//____________________________
AliFemtoString AliFemtoLikeSignAnalysis::Report()
{  
  // prepare report
  char tCtemp[200];
  cout << "AliFemtoLikeSignAnalysis - constructing Report..."<<endl;
  AliFemtoString temp = "-----------\nHbt Analysis Report:\n";
  sprintf(tCtemp,"Events are mixed in %d bins in the range %E cm to %E cm.\n",fVertexBins,fVertexZ[0],fVertexZ[1]);
  temp += tCtemp;
  sprintf(tCtemp,"Events underflowing: %d\n",fUnderFlow);
  temp += tCtemp;
  sprintf(tCtemp,"Events overflowing: %d\n",fOverFlow);
  temp += tCtemp;
  sprintf(tCtemp,"Now adding AliFemtoSimpleAnalysis(base) Report\n");
  temp += tCtemp; 
  temp += "Adding AliFemtoSimpleAnalysis(base) Report now:\n";
  temp += AliFemtoSimpleAnalysis::Report();
  temp += "-------------\n";
  AliFemtoString returnThis=temp;
  return returnThis;
}
//_________________________
void AliFemtoLikeSignAnalysis::ProcessEvent(const AliFemtoEvent* hbtEvent) {
  // perform all the analysis tasks for a single event
  // get right mixing buffer
  double vertexZ = hbtEvent->PrimVertPos().z();
  fMixingBuffer = fPicoEventCollectionVectorHideAway->PicoEventCollection(vertexZ); 
  if (!fMixingBuffer) {
    if ( vertexZ < fVertexZ[0] ) fUnderFlow++;
    if ( vertexZ > fVertexZ[1] ) fOverFlow++;
    return;
  }

  // startup for EbyE 
  EventBegin(hbtEvent);  
  // event cut and event cut monitor
  bool tmpPassEvent = fEventCut->Pass(hbtEvent);
  fEventCut->FillCutMonitor(hbtEvent, tmpPassEvent);
  if (tmpPassEvent) {
      fNeventsProcessed++;
      cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - " << hbtEvent->TrackCollection()->size();
      cout << " #track=" << hbtEvent->TrackCollection()->size();
      // OK, analysis likes the event-- build a pico event from it, using tracks the analysis likes...
      AliFemtoPicoEvent* picoEvent = new AliFemtoPicoEvent;       // this is what we will make pairs from and put in Mixing Buffer
      FillHbtParticleCollection(fFirstParticleCut,(AliFemtoEvent*)hbtEvent,picoEvent->FirstParticleCollection());
      if ( !(AnalyzeIdenticalParticles()) )
	FillHbtParticleCollection(fSecondParticleCut,(AliFemtoEvent*)hbtEvent,picoEvent->SecondParticleCollection());
      cout <<"   #particles in First, Second Collections: " <<
	picoEvent->FirstParticleCollection()->size() << " " <<
	picoEvent->SecondParticleCollection()->size() << endl;
      
      if (picoEvent->SecondParticleCollection()->size()*picoEvent->FirstParticleCollection()->size()==0) {
	delete picoEvent;
	cout << "AliFemtoLikeSignAnalysis - picoEvent deleted due to empty collection " <<endl; 
	return;
      }
      // OK, pico event is built
      // make real pairs...
      
      // Fabrice points out that we do not need to keep creating/deleting pairs all the time
      // We only ever need ONE pair, and we can just keep changing internal pointers
      // this should help speed things up
      AliFemtoPair* tThePair = new AliFemtoPair;
      
      AliFemtoParticleIterator tPartIter1;
      AliFemtoParticleIterator tPartIter2;
      AliFemtoCorrFctnIterator tCorrFctnIter;
      AliFemtoParticleIterator tStartOuterLoop = picoEvent->FirstParticleCollection()->begin();  // always
      AliFemtoParticleIterator tEndOuterLoop   = picoEvent->FirstParticleCollection()->end();    // will be one less if identical
      AliFemtoParticleIterator tStartInnerLoop;
      AliFemtoParticleIterator tEndInnerLoop;
      if (AnalyzeIdenticalParticles()) {             // only use First collection
	tEndOuterLoop--;                                               // outer loop goes to next-to-last particle in First collection
	tEndInnerLoop = picoEvent->FirstParticleCollection()->end() ;  // inner loop goes to last particle in First collection
      }
      else {                                                          // nonidentical - loop over First and Second collections
	tStartInnerLoop = picoEvent->SecondParticleCollection()->begin(); // inner loop starts at first particle in Second collection
	tEndInnerLoop   = picoEvent->SecondParticleCollection()->end() ;  // inner loop goes to last particle in Second collection
      }
      // real pairs
      for (tPartIter1=tStartOuterLoop;tPartIter1!=tEndOuterLoop;tPartIter1++){
	if (AnalyzeIdenticalParticles()){
	  tStartInnerLoop = tPartIter1;
	  tStartInnerLoop++;
	}
	tThePair->SetTrack1(*tPartIter1);
	for (tPartIter2 = tStartInnerLoop; tPartIter2!=tEndInnerLoop;tPartIter2++){
	  tThePair->SetTrack2(*tPartIter2);
	  // The following lines have to be uncommented if you want pairCutMonitors
	  // they are not in for speed reasons
	  // bool tmpPassPair = mPairCut->Pass(tThePair);
          // mPairCut->FillCutMonitor(tThePair, tmpPassPair);
	  // if ( tmpPassPair ) {
	  if (fPairCut->Pass(tThePair)){
	    for (tCorrFctnIter=fCorrFctnCollection->begin();
		 tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	      AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn*>(*tCorrFctnIter);
	      if (tCorrFctn) tCorrFctn->AddRealPair(tThePair);
	    }
	  }  // if passed pair cut
	}    // loop over second particle
      }      // loop over first particle
#ifdef STHBTDEBUG
      cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - reals done" << endl;
#endif

      AliFemtoParticleIterator nextIter;
      AliFemtoParticleIterator prevIter;

      // like sign first partilce collection pairs
      prevIter = tEndOuterLoop;
      prevIter--;
      for (tPartIter1=tStartOuterLoop;tPartIter1!=prevIter;tPartIter1++){
	tThePair->SetTrack1(*tPartIter1);
	nextIter = tPartIter1;
	nextIter++;
	for (tPartIter2 = nextIter; tPartIter2!=tEndOuterLoop;tPartIter2++){
	  tThePair->SetTrack2(*tPartIter2);
	  // The following lines have to be uncommented if you want pairCutMonitors
	  // they are not in for speed reasons
	  // bool tmpPassPair = mPairCut->Pass(tThePair);
          // mPairCut->FillCutMonitor(tThePair, tmpPassPair);
	  // if ( tmpPassPair ) {
	  if (fPairCut->Pass(tThePair)){
	    for (tCorrFctnIter=fCorrFctnCollection->begin();
		 tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	      AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn*>(*tCorrFctnIter);
	      if (tCorrFctn) tCorrFctn->AddLikeSignPositivePair(tThePair);
	    }
	  }  // if passed pair cut
	}    // loop over second particle
      }      // loop over first particle
#ifdef STHBTDEBUG
      cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - like sign first collection done" << endl;
#endif
      // like sign second partilce collection pairs
      prevIter = tEndInnerLoop;
      prevIter--;
      for (tPartIter1=tStartInnerLoop;tPartIter1!=prevIter;tPartIter1++){
	tThePair->SetTrack1(*tPartIter1);
	nextIter = tPartIter1;
	nextIter++;
	for (tPartIter2 = nextIter; tPartIter2!=tEndInnerLoop;tPartIter2++){
	  tThePair->SetTrack2(*tPartIter2);
	  // The following lines have to be uncommented if you want pairCutMonitors
	  // they are not in for speed reasons
	  // bool tmpPassPair = mPairCut->Pass(tThePair);
          // mPairCut->FillCutMonitor(tThePair, tmpPassPair);
	  // if ( tmpPassPair ) {
	  if (fPairCut->Pass(tThePair)){
	    for (tCorrFctnIter=fCorrFctnCollection->begin();
		 tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	      AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn*>(*tCorrFctnIter);
	      if (tCorrFctn) tCorrFctn->AddLikeSignNegativePair(tThePair);
	    }
	  }  // if passed pair cut
	}    // loop over second particle
      }      // loop over first particle
#ifdef STHBTDEBUG
      cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - like sign second collection done" << endl;
#endif
      
      if (MixingBufferFull()){
#ifdef STHBTDEBUG
	cout << "Mixing Buffer is full - lets rock and roll" << endl;
#endif
      }
      else {
	cout << "Mixing Buffer not full -gotta wait " << MixingBuffer()->size() << endl;
      }
      if (MixingBufferFull()){
	tStartOuterLoop = picoEvent->FirstParticleCollection()->begin();
	tEndOuterLoop   = picoEvent->FirstParticleCollection()->end();
	AliFemtoPicoEvent* storedEvent;
	AliFemtoPicoEventIterator picoEventIter;
	for (picoEventIter=MixingBuffer()->begin();picoEventIter!=MixingBuffer()->end();picoEventIter++){
	  storedEvent = *picoEventIter;
	  if (AnalyzeIdenticalParticles()){
	    tStartInnerLoop = storedEvent->FirstParticleCollection()->begin();
	    tEndInnerLoop = storedEvent->FirstParticleCollection()->end();
	  }
	  else{
	    tStartInnerLoop = storedEvent->SecondParticleCollection()->begin();
	    tEndInnerLoop = storedEvent->SecondParticleCollection()->end();
	  }
	  for (tPartIter1=tStartOuterLoop;tPartIter1!=tEndOuterLoop;tPartIter1++){
	    tThePair->SetTrack1(*tPartIter1);
	    for (tPartIter2=tStartInnerLoop;tPartIter2!=tEndInnerLoop;tPartIter2++){
	      tThePair->SetTrack2(*tPartIter2);
	      // testing...	      cout << "tThePair defined... going to pair cut... ";
	      if (fPairCut->Pass(tThePair)){
		// testing...		cout << " tThePair passed PairCut... ";
		for (tCorrFctnIter=fCorrFctnCollection->begin();
		     tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
		  AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn*>(*tCorrFctnIter);
		  if (tCorrFctn) { 
		    tCorrFctn->AddMixedPair(tThePair);
		    //cout << " tThePair has been added to MixedPair method " << endl;
		  }
		}
	      }  // if passed pair cut
	    }    // loop over second particle
	  }      // loop over first particle
	}        // loop over pico-events stored in Mixing buffer
	// Now get rid of oldest stored pico-event in buffer.
	// This means (1) delete the event from memory, (2) "pop" the pointer to it from the MixingBuffer
	delete MixingBuffer()->back();
	MixingBuffer()->pop_back();
      }  // if mixing buffer is full
      delete tThePair;
      MixingBuffer()->push_front(picoEvent);  // store the current pico-event in buffer
    }   // if currentEvent is accepted by currentAnalysis
    EventEnd(hbtEvent);  // cleanup for EbyE 
    //    cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - return to caller ... " << endl;
}
Commit	Line	Data
d92ed900	1	///////////////////////////////////////////////////////////////////////////
	2	// //
	3	// This is an analysis which calculated the background from like sign //
	4	// pairs in the same event //
	5	// //
	6	///////////////////////////////////////////////////////////////////////////
67427ff7	7
d0e92d9a	8	#include "AliFemtoLikeSignAnalysis.h"
	9	#include "AliFemtoParticleCollection.h"
	10	#include "AliFemtoPicoEventCollectionVector.h"
	11	#include "AliFemtoPicoEventCollectionVectorHideAway.h"
67427ff7	12
	13	#ifdef __ROOT__
	14	ClassImp(AliFemtoLikeSignAnalysis)
	15	#endif
	16
	17	// this little function used to apply ParticleCuts (TrackCuts or V0Cuts) and fill ParticleCollections of picoEvent
a5b23aa6	18	// it is called from AliFemtoSimpleAnalysis::ProcessEvent()
67427ff7	19
	20
	21	extern void FillHbtParticleCollection(AliFemtoParticleCut* partCut,
	22	AliFemtoEvent* hbtEvent,
	23	AliFemtoParticleCollection* partCollection);
	24
	25
	26	//____________________________
0215f606	27	AliFemtoLikeSignAnalysis::AliFemtoLikeSignAnalysis(unsigned int bins, double min, double max) :
a5b23aa6	28	AliFemtoSimpleAnalysis(),
0215f606	29	fVertexBins(0),
	30	fOverFlow(0),
	31	fUnderFlow(0)
	32	{
d92ed900	33	// standard constructor
67427ff7	34	fVertexBins = bins;
	35	fVertexZ[0] = min;
	36	fVertexZ[1] = max;
	37	fUnderFlow = 0;
	38	fOverFlow = 0;
	39	if (fMixingBuffer) delete fMixingBuffer;
	40	fPicoEventCollectionVectorHideAway = new AliFemtoPicoEventCollectionVectorHideAway(fVertexBins,fVertexZ[0],fVertexZ[1]);
	41	/* no-op */
	42	}
	43	//____________________________
0215f606	44	AliFemtoLikeSignAnalysis::AliFemtoLikeSignAnalysis(const AliFemtoLikeSignAnalysis& a) :
a5b23aa6	45	AliFemtoSimpleAnalysis(a) ,
0215f606	46	fVertexBins(0),
	47	fOverFlow(0),
	48	fUnderFlow(0)
	49	{
d92ed900	50	// copy constructor
67427ff7	51	fVertexBins = a.fVertexBins;
	52	fVertexZ[0] = a.fVertexZ[0];
	53	fVertexZ[1] = a.fVertexZ[1];
	54	fUnderFlow = 0;
	55	fOverFlow = 0;
	56	if (fMixingBuffer) delete fMixingBuffer;
	57	fPicoEventCollectionVectorHideAway = new AliFemtoPicoEventCollectionVectorHideAway(fVertexBins,fVertexZ[0],fVertexZ[1]);
	58	}
	59	//____________________________
	60	AliFemtoLikeSignAnalysis::~AliFemtoLikeSignAnalysis(){
d92ed900	61	// destructor
67427ff7	62	delete fPicoEventCollectionVectorHideAway; fPicoEventCollectionVectorHideAway=0;
	63	}
	64	//____________________________
	65	AliFemtoString AliFemtoLikeSignAnalysis::Report()
	66	{
d92ed900	67	// prepare report
d92ed900	68	char tCtemp[200];
67427ff7	69	cout << "AliFemtoLikeSignAnalysis - constructing Report..."<<endl;
67427ff7	70	AliFemtoString temp = "-----------\nHbt Analysis Report:\n";
d92ed900	71	sprintf(tCtemp,"Events are mixed in %d bins in the range %E cm to %E cm.\n",fVertexBins,fVertexZ[0],fVertexZ[1]);
	72	temp += tCtemp;
	73	sprintf(tCtemp,"Events underflowing: %d\n",fUnderFlow);
	74	temp += tCtemp;
	75	sprintf(tCtemp,"Events overflowing: %d\n",fOverFlow);
	76	temp += tCtemp;
a5b23aa6	77	sprintf(tCtemp,"Now adding AliFemtoSimpleAnalysis(base) Report\n");
d92ed900	78	temp += tCtemp;
a5b23aa6	79	temp += "Adding AliFemtoSimpleAnalysis(base) Report now:\n";
a5b23aa6	80	temp += AliFemtoSimpleAnalysis::Report();
67427ff7	81	temp += "-------------\n";
	82	AliFemtoString returnThis=temp;
	83	return returnThis;
	84	}
	85	//_________________________
	86	void AliFemtoLikeSignAnalysis::ProcessEvent(const AliFemtoEvent* hbtEvent) {
d92ed900	87	// perform all the analysis tasks for a single event
67427ff7	88	// get right mixing buffer
	89	double vertexZ = hbtEvent->PrimVertPos().z();
	90	fMixingBuffer = fPicoEventCollectionVectorHideAway->PicoEventCollection(vertexZ);
	91	if (!fMixingBuffer) {
	92	if ( vertexZ < fVertexZ[0] ) fUnderFlow++;
	93	if ( vertexZ > fVertexZ[1] ) fOverFlow++;
	94	return;
	95	}
	96
	97	// startup for EbyE
	98	EventBegin(hbtEvent);
	99	// event cut and event cut monitor
	100	bool tmpPassEvent = fEventCut->Pass(hbtEvent);
	101	fEventCut->FillCutMonitor(hbtEvent, tmpPassEvent);
	102	if (tmpPassEvent) {
	103	fNeventsProcessed++;
	104	cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - " << hbtEvent->TrackCollection()->size();
	105	cout << " #track=" << hbtEvent->TrackCollection()->size();
	106	// OK, analysis likes the event-- build a pico event from it, using tracks the analysis likes...
	107	AliFemtoPicoEvent* picoEvent = new AliFemtoPicoEvent; // this is what we will make pairs from and put in Mixing Buffer
	108	FillHbtParticleCollection(fFirstParticleCut,(AliFemtoEvent*)hbtEvent,picoEvent->FirstParticleCollection());
	109	if ( !(AnalyzeIdenticalParticles()) )
	110	FillHbtParticleCollection(fSecondParticleCut,(AliFemtoEvent*)hbtEvent,picoEvent->SecondParticleCollection());
	111	cout <<" #particles in First, Second Collections: " <<
	112	picoEvent->FirstParticleCollection()->size() << " " <<
	113	picoEvent->SecondParticleCollection()->size() << endl;
	114
	115	if (picoEvent->SecondParticleCollection()->size()*picoEvent->FirstParticleCollection()->size()==0) {
	116	delete picoEvent;
	117	cout << "AliFemtoLikeSignAnalysis - picoEvent deleted due to empty collection " <<endl;
	118	return;
	119	}
	120	// OK, pico event is built
	121	// make real pairs...
	122
	123	// Fabrice points out that we do not need to keep creating/deleting pairs all the time
	124	// We only ever need ONE pair, and we can just keep changing internal pointers
	125	// this should help speed things up
d92ed900	126	AliFemtoPair* tThePair = new AliFemtoPair;
67427ff7	127
d92ed900	128	AliFemtoParticleIterator tPartIter1;
	129	AliFemtoParticleIterator tPartIter2;
	130	AliFemtoCorrFctnIterator tCorrFctnIter;
	131	AliFemtoParticleIterator tStartOuterLoop = picoEvent->FirstParticleCollection()->begin(); // always
	132	AliFemtoParticleIterator tEndOuterLoop = picoEvent->FirstParticleCollection()->end(); // will be one less if identical
	133	AliFemtoParticleIterator tStartInnerLoop;
	134	AliFemtoParticleIterator tEndInnerLoop;
67427ff7	135	if (AnalyzeIdenticalParticles()) { // only use First collection
d92ed900	136	tEndOuterLoop--; // outer loop goes to next-to-last particle in First collection
d92ed900	137	tEndInnerLoop = picoEvent->FirstParticleCollection()->end() ; // inner loop goes to last particle in First collection
67427ff7	138	}
67427ff7	139	else { // nonidentical - loop over First and Second collections
d92ed900	140	tStartInnerLoop = picoEvent->SecondParticleCollection()->begin(); // inner loop starts at first particle in Second collection
d92ed900	141	tEndInnerLoop = picoEvent->SecondParticleCollection()->end() ; // inner loop goes to last particle in Second collection
67427ff7	142	}
67427ff7	143	// real pairs
d92ed900	144	for (tPartIter1=tStartOuterLoop;tPartIter1!=tEndOuterLoop;tPartIter1++){
67427ff7	145	if (AnalyzeIdenticalParticles()){
d92ed900	146	tStartInnerLoop = tPartIter1;
d92ed900	147	tStartInnerLoop++;
67427ff7	148	}
d92ed900	149	tThePair->SetTrack1(*tPartIter1);
	150	for (tPartIter2 = tStartInnerLoop; tPartIter2!=tEndInnerLoop;tPartIter2++){
	151	tThePair->SetTrack2(*tPartIter2);
67427ff7	152	// The following lines have to be uncommented if you want pairCutMonitors
67427ff7	153	// they are not in for speed reasons
d92ed900	154	// bool tmpPassPair = mPairCut->Pass(tThePair);
d92ed900	155	// mPairCut->FillCutMonitor(tThePair, tmpPassPair);
67427ff7	156	// if ( tmpPassPair ) {
d92ed900	157	if (fPairCut->Pass(tThePair)){
	158	for (tCorrFctnIter=fCorrFctnCollection->begin();
	159	tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	160	AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn>(tCorrFctnIter);
	161	if (tCorrFctn) tCorrFctn->AddRealPair(tThePair);
67427ff7	162	}
	163	} // if passed pair cut
	164	} // loop over second particle
	165	} // loop over first particle
	166	#ifdef STHBTDEBUG
	167	cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - reals done" << endl;
	168	#endif
	169
	170	AliFemtoParticleIterator nextIter;
	171	AliFemtoParticleIterator prevIter;
	172
	173	// like sign first partilce collection pairs
d92ed900	174	prevIter = tEndOuterLoop;
67427ff7	175	prevIter--;
d92ed900	176	for (tPartIter1=tStartOuterLoop;tPartIter1!=prevIter;tPartIter1++){
	177	tThePair->SetTrack1(*tPartIter1);
	178	nextIter = tPartIter1;
67427ff7	179	nextIter++;
d92ed900	180	for (tPartIter2 = nextIter; tPartIter2!=tEndOuterLoop;tPartIter2++){
d92ed900	181	tThePair->SetTrack2(*tPartIter2);
67427ff7	182	// The following lines have to be uncommented if you want pairCutMonitors
67427ff7	183	// they are not in for speed reasons
d92ed900	184	// bool tmpPassPair = mPairCut->Pass(tThePair);
d92ed900	185	// mPairCut->FillCutMonitor(tThePair, tmpPassPair);
67427ff7	186	// if ( tmpPassPair ) {
d92ed900	187	if (fPairCut->Pass(tThePair)){
	188	for (tCorrFctnIter=fCorrFctnCollection->begin();
	189	tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
55dda989	190	AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn>(tCorrFctnIter);
55dda989	191	if (tCorrFctn) tCorrFctn->AddLikeSignPositivePair(tThePair);
67427ff7	192	}
	193	} // if passed pair cut
	194	} // loop over second particle
	195	} // loop over first particle
	196	#ifdef STHBTDEBUG
	197	cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - like sign first collection done" << endl;
	198	#endif
	199	// like sign second partilce collection pairs
d92ed900	200	prevIter = tEndInnerLoop;
67427ff7	201	prevIter--;
d92ed900	202	for (tPartIter1=tStartInnerLoop;tPartIter1!=prevIter;tPartIter1++){
	203	tThePair->SetTrack1(*tPartIter1);
	204	nextIter = tPartIter1;
67427ff7	205	nextIter++;
d92ed900	206	for (tPartIter2 = nextIter; tPartIter2!=tEndInnerLoop;tPartIter2++){
d92ed900	207	tThePair->SetTrack2(*tPartIter2);
67427ff7	208	// The following lines have to be uncommented if you want pairCutMonitors
67427ff7	209	// they are not in for speed reasons
d92ed900	210	// bool tmpPassPair = mPairCut->Pass(tThePair);
d92ed900	211	// mPairCut->FillCutMonitor(tThePair, tmpPassPair);
67427ff7	212	// if ( tmpPassPair ) {
d92ed900	213	if (fPairCut->Pass(tThePair)){
	214	for (tCorrFctnIter=fCorrFctnCollection->begin();
	215	tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	216	AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn>(tCorrFctnIter);
	217	if (tCorrFctn) tCorrFctn->AddLikeSignNegativePair(tThePair);
67427ff7	218	}
	219	} // if passed pair cut
	220	} // loop over second particle
	221	} // loop over first particle
	222	#ifdef STHBTDEBUG
	223	cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - like sign second collection done" << endl;
	224	#endif
	225
	226	if (MixingBufferFull()){
	227	#ifdef STHBTDEBUG
	228	cout << "Mixing Buffer is full - lets rock and roll" << endl;
	229	#endif
	230	}
	231	else {
	232	cout << "Mixing Buffer not full -gotta wait " << MixingBuffer()->size() << endl;
	233	}
	234	if (MixingBufferFull()){
d92ed900	235	tStartOuterLoop = picoEvent->FirstParticleCollection()->begin();
d92ed900	236	tEndOuterLoop = picoEvent->FirstParticleCollection()->end();
67427ff7	237	AliFemtoPicoEvent* storedEvent;
	238	AliFemtoPicoEventIterator picoEventIter;
	239	for (picoEventIter=MixingBuffer()->begin();picoEventIter!=MixingBuffer()->end();picoEventIter++){
	240	storedEvent = *picoEventIter;
	241	if (AnalyzeIdenticalParticles()){
d92ed900	242	tStartInnerLoop = storedEvent->FirstParticleCollection()->begin();
d92ed900	243	tEndInnerLoop = storedEvent->FirstParticleCollection()->end();
67427ff7	244	}
67427ff7	245	else{
d92ed900	246	tStartInnerLoop = storedEvent->SecondParticleCollection()->begin();
d92ed900	247	tEndInnerLoop = storedEvent->SecondParticleCollection()->end();
67427ff7	248	}
d92ed900	249	for (tPartIter1=tStartOuterLoop;tPartIter1!=tEndOuterLoop;tPartIter1++){
	250	tThePair->SetTrack1(*tPartIter1);
	251	for (tPartIter2=tStartInnerLoop;tPartIter2!=tEndInnerLoop;tPartIter2++){
	252	tThePair->SetTrack2(*tPartIter2);
	253	// testing... cout << "tThePair defined... going to pair cut... ";
	254	if (fPairCut->Pass(tThePair)){
	255	// testing... cout << " tThePair passed PairCut... ";
	256	for (tCorrFctnIter=fCorrFctnCollection->begin();
	257	tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
	258	AliFemtoLikeSignCorrFctn* tCorrFctn = dynamic_cast<AliFemtoLikeSignCorrFctn>(tCorrFctnIter);
	259	if (tCorrFctn) {
	260	tCorrFctn->AddMixedPair(tThePair);
	261	//cout << " tThePair has been added to MixedPair method " << endl;
67427ff7	262	}
	263	}
	264	} // if passed pair cut
	265	} // loop over second particle
	266	} // loop over first particle
	267	} // loop over pico-events stored in Mixing buffer
	268	// Now get rid of oldest stored pico-event in buffer.
	269	// This means (1) delete the event from memory, (2) "pop" the pointer to it from the MixingBuffer
	270	delete MixingBuffer()->back();
	271	MixingBuffer()->pop_back();
	272	} // if mixing buffer is full
d92ed900	273	delete tThePair;
67427ff7	274	MixingBuffer()->push_front(picoEvent); // store the current pico-event in buffer
	275	} // if currentEvent is accepted by currentAnalysis
	276	EventEnd(hbtEvent); // cleanup for EbyE
	277	// cout << "AliFemtoLikeSignAnalysis::ProcessEvent() - return to caller ... " << endl;
	278	}
	279
	280
	281