StEEmcMixMaker.cxx

#include "StEEmcMixMaker.h"
#include "StEEmcPointMaker.h"
#include "StEEmcA2EMaker.h"

#include "StMuDSTMaker/COMMON/StMuDstMaker.h"
#include "StMuDSTMaker/COMMON/StMuDst.h"
#include "StMuDSTMaker/COMMON/StMuEvent.h"
#include "StEvent/StTriggerIdCollection.h"
#include "StEvent/StTriggerId.h"

#include "StEEmcUtil/EEmcGeom/EEmcGeomSimple.h"
#include "StarRoot/TH1Helper.h"

#include "TRandom.h"
#include "TH1F.h"
#include "TH2F.h"

#define SIMPLE_MC

ClassImp(StEEmcMixMaker);

// ----------------------------------------------------------------------------
StEEmcMixMaker::StEEmcMixMaker(const Char_t *name,Int_t s):StMaker(name)
{
  mRandom=new TRandom();
  mPoolSize=s; 

  mEEmcTow = new EEmcGeomSimple();

  minET(1.0);     // minimum pair E_T [GeV]
  maxZ(0.5);      // maximum pair zgg [GeV]
  minEpoint(0.8); // minimum point energy [GeV]
  range(0.11,0.17); 
  mTrigMode=0;

  StEEmcPointVec_t points;
  for ( Int_t i=0; i<40; i++ ) mPool.push_back(points);

  mFixedVertex=TVector3(-999.,-999.,-999.);
  mSigmaVertex=-999.;

}

// ----------------------------------------------------------------------------
Int_t StEEmcMixMaker::Init()
{
  mEEpoints=(StEEmcPointMaker *)GetMaker(mPointMakerName); 
  assert(mEEpoints);
  mEEanalysis=(StEEmcA2EMaker *)GetMaker(mAnalysisName);   
  assert(mEEanalysis);
  mMuDstMaker=(StMuDstMaker   *)GetMaker(mMuDstMakerName); 
  assert(mMuDstMaker);

  book();

  return StMaker::Init();
}

// ----------------------------------------------------------------------------
Int_t StEEmcMixMaker::Make()
{

  if ( !accept( mMuDstMaker -> muDst() -> event() ) ) 
    return kStOK;

  mH1[1]->Fill("accepted",1.0);

  mPoints=mEEpoints->points();
    
  if ( mPoints.size() <= 1 ) return kStOK;
  mH1[1]->Fill( "2+ points", 1.0);

  mixReal();
    
  mixBackground();

  fill();

  fillPool();

  return kStOK;
}

// ----------------------------------------------------------------------------
void StEEmcMixMaker::Clear( Option_t *opts )
{
  mCandidates.clear();
  mBackground.clear();
  mPoints.clear();

  return;
}

// ----------------------------------------------------------------------------
void StEEmcMixMaker::mixReal()
{

  if ( !mPoints.size() ) return; 

  Float_t emax=0.;
  Int_t   count=0;


  StMuEvent *event = mMuDstMaker -> muDst() -> event();
  if ( !event ) return ; 
  StThreeVectorF v=event->primaryVertexPosition();
  TVector3 vertex = TVector3(v.x(),v.y(),v.z());


  if ( mFixedVertex.Z()<-500. ) {
    if ( v.z()==0. && v.x()==0. && v.y()==0. ) return; 
  }
  else {
    vertex=mFixedVertex;
    if ( mSigmaVertex > 0. ) vertex[2]=( mFixedVertex.Z() + mRandom->Gaus(0.,mSigmaVertex));
  }
  
  
  for ( UInt_t ipoint=0; ipoint<mPoints.size()-1; ipoint++ )
    for ( UInt_t jpoint=ipoint+1; jpoint<mPoints.size(); jpoint++ )
      {

        StEEmcPoint point1=mPoints[ipoint];
        StEEmcPoint point2=mPoints[jpoint];
       
        Bool_t go1 = false;
        Bool_t go2 = false;
        for ( UInt_t isec=0;isec<mSectorList.size();isec++ )
          {
            go1 |= point1.sector() == mSectorList[isec];
            go2 |= point2.sector() == mSectorList[isec];
          }
        if ( !(go1&&go2) ) continue;


        if ( point1.sector() != point2.sector() ) continue;

        count++;
        mCandidates.push_back ( StEEmcPair( point1, point2, vertex, vertex ) );
        if ( mCandidates.back().energy() > emax ) { 
          emax = mCandidates.back().energy();
        }

      }

 
}

void StEEmcMixMaker::mixBackground()
{

  if ( !mPoints.size() ) return ; 

  StEEmcTower high_tower = mEEanalysis->hightower();

  Int_t bin=(Int_t)(high_tower.adc()/100);
  if ( bin<0 ) bin=0;
  if ( bin>40 ) bin=40;

  StEEmcPointVec_t &points = mPool[bin];

  StMuEvent *event = mMuDstMaker -> muDst() -> event();
  if ( !event ) return; 
  StThreeVectorF v=event->primaryVertexPosition();
  TVector3 vertex = TVector3(v.x(),v.y(),v.z());

  if ( mFixedVertex.Z()<-500. ) {
    if ( v.z()==0. && v.x()==0. && v.y()==0. ) return; 
  }
  else {
    vertex=mFixedVertex;
    if ( mSigmaVertex > 0. ) vertex[2]=( mFixedVertex.Z() + mRandom->Gaus(0.,mSigmaVertex)); 
  }


  for ( UInt_t i=0; i<mPoints.size(); i++ ) {

    StEEmcPoint point1=mPoints[i];

    for ( UInt_t j=0; j<points.size(); j++ ) {

      StEEmcPoint point2=points[j];

      Bool_t go1 = false;
      Bool_t go2 = false;
      for ( UInt_t isec=0;isec<mSectorList.size();isec++ )
          {
            go1 |= point1.sector() == mSectorList[isec];
            go2 |= point2.sector() == mSectorList[isec];
          }
      if ( !(go1&&go2) ) continue;

      if ( point1.sector() != point2.sector() ) continue;

      mBackground.push_back( StEEmcPair( point1, point2, vertex, vertex ) );

      

    }// pool

  }// current

}



// ----------------------------------------------------------------------------
Bool_t StEEmcMixMaker::accept( StMuEvent *event )
{
  if ( !event ) return false;
  StMuTriggerIdCollection tic = event -> triggerIdCollection();
  StTriggerId l1trig = tic.l1();

  if ( mTriggerList.size() <= 0 ) {
      mH1[0]->Fill("no selection",1.0); 
      return true; 
  }

  Int_t go=0;
  std::vector<Int_t>::iterator iter=mTriggerList.begin();
  while ( iter != mTriggerList.end() ) {
    go = l1trig.isTrigger( (*iter) );
    if ( go ) {
      go = (*iter);
      break;   
    }
    iter++;
  }
  TString name=go;
  mH1[0]->Fill(name,1.0);
  return (go!=0);
}


// ----------------------------------------------------------------------------
void StEEmcMixMaker::book()
{
  
    // 1D QA histograms
  mH1.push_back(new TH1F("triggers","Number of triggers fired",1,0.,1.));
  TH1Helper::SetCanRebin(mH1[0]);
  mH1.push_back(new TH1F("status","Events processed up to...",1,0.,1.));
  TH1Helper::SetCanRebin(mH1[1]);

  // 2D QA histograms
  mH2.push_back(new TH2F("uvha","<u> vs <v> for higher-energy gamma",288,0.,288.,288,0.,288.)); 
  mH2.push_back(new TH2F("uvla","<u> vs <v> for lower-energy gamma",288,0.,288.,288,0.,288.)); 
  mH2.push_back(new TH2F("uvhc","<u> vs <v> for higher-energy gamma, mass cut",288,0.,288.,288,0.,288.)); 
  mH2.push_back(new TH2F("uvlc","<u> vs <v> for lower-energy gamma, mass cut",288,0.,288.,288,0.,288.)); 


  mH1real.push_back(new TH1F("massR","Invariant mass of photon pairs",360,0.,3.6) );
  mH1real.push_back(new TH1F("energyR","Energy of photon pairs",200,0.,40.));
  mH1real.push_back(new TH1F("zggR","Energy sharing of photon pairs",50,0.,1.));
  mH1real.push_back(new TH1F("phiggR","Opening angle of photon pairs",100,0.,0.1));
  mH1real.push_back(new TH1F("ptR","p_{T} of photon pairs",100,0.,10.));
  mH1real.push_back(new TH1F("zvertexR","Z_{vertex} [cm]",100,-100.,100.));
  
  mH1mix.push_back(new TH1F("massM","Invariant mass of photon pairs",360,0.,3.6) );
  mH1mix.push_back(new TH1F("energyM","Energy of photon pairs",200,0.,40.));
  mH1mix.push_back(new TH1F("zggM","Energy sharing of photon pairs",50,0.,1.));
  mH1mix.push_back(new TH1F("phiggM","Opening angle of photon pairs",100,0.,0.1));
  mH1mix.push_back(new TH1F("ptM","p_{T} of photon pairs",100,0.,10.));
  mH1mix.push_back(new TH1F("zvertexM","Z_{vertex} [cm]",100,-100.,100.));
  
}

// ----------------------------------------------------------------------------
void StEEmcMixMaker::fill()
{

    StEEmcPairVec_t::iterator ipair=mCandidates.begin(); 
    while ( ipair != mCandidates.end() ) { 
      fill( mH1real, (*ipair ) ); 
      fillQA( mH2, (*ipair ) );       
      ipair++; 
    } 

    ipair=mBackground.begin();
    while ( ipair != mBackground.end() ) {
        fill( mH1mix, (*ipair) );
        ipair++;
    } 
  
}

void StEEmcMixMaker::fillQA( std::vector<TH2F *> &h, StEEmcPair pair ) 
{

    StEEmcPoint p1=pair.point(0);
    StEEmcPoint p2=pair.point(1); 
    StEEmcSmdCluster uh,ul,vh,vl; 
    if ( p1.energy() > p2.energy() ) {
        uh=p1.cluster(0); vh=p1.cluster(1); 
        ul=p2.cluster(0); vl=p2.cluster(1);
    }
    else {
        ul=p1.cluster(0); vl=p1.cluster(1); 
        uh=p2.cluster(0); vh=p2.cluster(1);
    } 
    mH2[0]->Fill( uh.mean(), vh.mean() );
    mH2[1]->Fill( ul.mean(), vl.mean() ); 
    if ( pair.mass() > mMinMass && pair.mass() < mMaxMass ) { 
        mH2[2]->Fill( uh.mean(), vh.mean() );
        mH2[3]->Fill( ul.mean(), vl.mean() );
    } 

} 

void StEEmcMixMaker::fill( std::vector<TH1F*> &h, StEEmcPair pair )
{

    h[0]->Fill( pair.mass() );
    if ( pair.mass() > mMinMass && pair.mass() < mMaxMass ) { 
        h[1]->Fill( pair.energy() );
        h[2]->Fill( pair.zgg() );
        h[3]->Fill( pair.phigg() );
        h[4]->Fill( pair.vertex().Z() );
    }

} 


// ----------------------------------------------------------------------------
void StEEmcMixMaker::fillPool()
{

  if ( !mPoints.size() ) return;

  StEEmcTower high_tower = mEEanalysis->hightower();

  Int_t bin=(Int_t)(high_tower.adc()/100);
  if ( bin<0 ) bin=0;
  if ( bin>40 ) bin=40;

  StEEmcPointVec_t &points = mPool[bin];

  std::reverse(points.begin(),points.end());

  for ( UInt_t i=0; i<mPoints.size(); i++ ) {

    TVector3 d=mPoints[i].position();
    
    Int_t sec,sub,eta;
    if ( !mEEmcTow->getTower(d,sec,sub,eta) ) continue;

    if ( mTrigMode == 1 ) {
      if ( sec==high_tower.sector() && 
           sub==high_tower.subsector() && 
           eta==high_tower.etabin() ) continue;
    }
    
    points.push_back( mPoints[i] );

  }

  std::reverse(points.begin(),points.end());

  if ( points.size() > (UInt_t)mPoolSize ) points.resize(mPoolSize);

}

// ----------------------------------------------------------------------------