class AliFlowVector;
+//////////////////////////////////////////////////////////////////////////////
// AliFlowAnalysisWithScalarProduct:
// Description:
// Maker to analyze Flow with the Scalar product method.
//
-// author: N. van der Kolk (kolk@nikhef.nl)
+// authors: N. van der Kolk (kolk@nikhef.nl), A. Bilandzic (anteb@nikhef.nl)
+//////////////////////////////////////////////////////////////////////////////
ClassImp(AliFlowAnalysisWithScalarProduct)
//-----------------------------------------------------------------------
-
- AliFlowAnalysisWithScalarProduct::AliFlowAnalysisWithScalarProduct():
+ AliFlowAnalysisWithScalarProduct::AliFlowAnalysisWithScalarProduct():
fEventNumber(0),
fDebug(kFALSE),
+ fWeightsList(NULL),
+ fUsePhiWeights(kFALSE),
+ fPhiWeights(NULL),
fHistList(NULL),
fHistProUQetaRP(NULL),
fHistProUQetaPOI(NULL),
fHistProUQPtRP(NULL),
fHistProUQPtPOI(NULL),
fHistProQaQb(NULL),
- fHistProM(NULL),
+ fHistSumOfLinearWeights(NULL),
+ fHistSumOfQuadraticWeights(NULL),
+ fHistProUQQaQbPtRP(NULL),
+ fHistProUQQaQbEtaRP(NULL),
+ fHistProUQQaQbPtPOI(NULL),
+ fHistProUQQaQbEtaPOI(NULL),
fCommonHists(NULL),
fCommonHistsRes(NULL)
{
// Constructor.
+ fWeightsList = new TList();
fHistList = new TList();
+
+ // Initialize arrays:
+ for(Int_t i=0;i<3;i++)
+ {
+ fHistSumOfWeightsPtRP[i] = NULL;
+ fHistSumOfWeightsEtaRP[i] = NULL;
+ fHistSumOfWeightsPtPOI[i] = NULL;
+ fHistSumOfWeightsEtaPOI[i] = NULL;
+ }
}
//-----------------------------------------------------------------------
-
-
AliFlowAnalysisWithScalarProduct::~AliFlowAnalysisWithScalarProduct()
{
//destructor
+ delete fWeightsList;
delete fHistList;
}
-
//-----------------------------------------------------------------------
-
void AliFlowAnalysisWithScalarProduct::WriteHistograms(TString* outputFileName)
{
//store the final results in output .root file
}
//-----------------------------------------------------------------------
-
void AliFlowAnalysisWithScalarProduct::WriteHistograms(TString outputFileName)
{
//store the final results in output .root file
delete output;
}
+//-----------------------------------------------------------------------
+void AliFlowAnalysisWithScalarProduct::WriteHistograms(TDirectoryFile *outputFileName)
+{
+ //store the final results in output .root file
+ fHistList->SetName("cobjSP");
+ fHistList->SetOwner(kTRUE);
+ outputFileName->Add(fHistList);
+ outputFileName->Write(outputFileName->GetName(), TObject::kSingleKey);
+}
+
//-----------------------------------------------------------------------
void AliFlowAnalysisWithScalarProduct::Init() {
//Define all histograms
cout<<"---Analysis with the Scalar Product Method--- Init"<<endl;
- Int_t iNbinsPt = AliFlowCommonConstants::GetNbinsPt();
- Double_t dPtMin = AliFlowCommonConstants::GetPtMin();
- Double_t dPtMax = AliFlowCommonConstants::GetPtMax();
- Int_t iNbinsEta = AliFlowCommonConstants::GetNbinsEta();
- Double_t dEtaMin = AliFlowCommonConstants::GetEtaMin();
- Double_t dEtaMax = AliFlowCommonConstants::GetEtaMax();
+ Int_t iNbinsPt = AliFlowCommonConstants::GetMaster()->GetNbinsPt();
+ Double_t dPtMin = AliFlowCommonConstants::GetMaster()->GetPtMin();
+ Double_t dPtMax = AliFlowCommonConstants::GetMaster()->GetPtMax();
+ Int_t iNbinsEta = AliFlowCommonConstants::GetMaster()->GetNbinsEta();
+ Double_t dEtaMin = AliFlowCommonConstants::GetMaster()->GetEtaMin();
+ Double_t dEtaMax = AliFlowCommonConstants::GetMaster()->GetEtaMax();
- fHistProUQetaRP = new TProfile("Flow_UQetaRP_SP","Flow_UQetaRP_SP",iNbinsEta,dEtaMin,dEtaMax);
+ fHistProUQetaRP = new TProfile("Flow_UQetaRP_SP","Flow_UQetaRP_SP",iNbinsEta,dEtaMin,dEtaMax,"s");
fHistProUQetaRP->SetXTitle("{eta}");
fHistProUQetaRP->SetYTitle("<uQ>");
fHistList->Add(fHistProUQetaRP);
- fHistProUQetaPOI = new TProfile("Flow_UQetaPOI_SP","Flow_UQetaPOI_SP",iNbinsEta,dEtaMin,dEtaMax);
+ fHistProUQetaPOI = new TProfile("Flow_UQetaPOI_SP","Flow_UQetaPOI_SP",iNbinsEta,dEtaMin,dEtaMax,"s");
fHistProUQetaPOI->SetXTitle("{eta}");
fHistProUQetaPOI->SetYTitle("<uQ>");
fHistList->Add(fHistProUQetaPOI);
- fHistProUQPtRP = new TProfile("Flow_UQPtRP_SP","Flow_UQPtRP_SP",iNbinsPt,dPtMin,dPtMax);
+ fHistProUQPtRP = new TProfile("Flow_UQPtRP_SP","Flow_UQPtRP_SP",iNbinsPt,dPtMin,dPtMax,"s");
fHistProUQPtRP->SetXTitle("p_t (GeV)");
fHistProUQPtRP->SetYTitle("<uQ>");
fHistList->Add(fHistProUQPtRP);
- fHistProUQPtPOI = new TProfile("Flow_UQPtPOI_SP","Flow_UQPtPOI_SP",iNbinsPt,dPtMin,dPtMax);
+ fHistProUQPtPOI = new TProfile("Flow_UQPtPOI_SP","Flow_UQPtPOI_SP",iNbinsPt,dPtMin,dPtMax,"s");
fHistProUQPtPOI->SetXTitle("p_t (GeV)");
fHistProUQPtPOI->SetYTitle("<uQ>");
fHistList->Add(fHistProUQPtPOI);
- fHistProQaQb = new TProfile("Flow_QaQb_SP","Flow_QaQb_SP", 1, -0.5, 0.5);
+ fHistProQaQb = new TProfile("Flow_QaQb_SP","Flow_QaQb_SP", 1, 0.5, 1.5,"s");
fHistProQaQb->SetYTitle("<QaQb>");
fHistList->Add(fHistProQaQb);
- fHistProM = new TProfile("Flow_M_SP","Flow_M_SP",2,0.5, 2.5);
- fHistProM -> SetYTitle("<*>");
- fHistProM -> SetXTitle("<M-1>, <Ma*Mb>");
- fHistList->Add(fHistProM);
-
+ fHistSumOfLinearWeights = new TH1D("Flow_SumOfLinearWeights_SP","Flow_SumOfLinearWeights_SP",1,-0.5, 0.5);
+ fHistSumOfLinearWeights -> SetYTitle("sum (*)");
+ fHistSumOfLinearWeights -> SetXTitle("sum (Ma*Mb)");
+ fHistList->Add(fHistSumOfLinearWeights);
+
+ fHistSumOfQuadraticWeights = new TH1D("Flow_SumOfQuadraticWeights_SP","Flow_SumOfQuadraticWeights_SP",1,-0.5, 0.5);
+ fHistSumOfQuadraticWeights -> SetYTitle("sum (*)");
+ fHistSumOfQuadraticWeights -> SetXTitle("sum (Ma*Mb)^2");
+ fHistList->Add(fHistSumOfQuadraticWeights);
+
+ fHistProUQQaQbPtRP = new TProfile("Flow_UQQaQbPtRP_SP","Flow_UQQaQbPtRP_SP",iNbinsPt,dPtMin,dPtMax);
+ fHistProUQQaQbPtRP -> SetYTitle("<*>");
+ fHistProUQQaQbPtRP -> SetXTitle("<Qu QaQb>");
+ fHistList->Add(fHistProUQQaQbPtRP);
+
+ fHistProUQQaQbEtaRP = new TProfile("Flow_UQQaQbEtaRP_SP","Flow_UQQaQbEtaRP_SP",iNbinsEta,dEtaMin,dEtaMax);
+ fHistProUQQaQbEtaRP -> SetYTitle("<*>");
+ fHistProUQQaQbEtaRP -> SetXTitle("<Qu QaQb>");
+ fHistList->Add(fHistProUQQaQbEtaRP);
+
+ fHistProUQQaQbPtPOI = new TProfile("Flow_UQQaQbPtPOI_SP","Flow_UQQaQbPtPOI_SP",iNbinsPt,dPtMin,dPtMax);
+ fHistProUQQaQbPtPOI -> SetYTitle("<*>");
+ fHistProUQQaQbPtPOI -> SetXTitle("<Qu QaQb>");
+ fHistList->Add(fHistProUQQaQbPtPOI);
+
+ fHistProUQQaQbEtaPOI = new TProfile("Flow_UQQaQbEtaPOI_SP","Flow_UQQaQbEtaPOI_SP",iNbinsEta,dEtaMin,dEtaMax);
+ fHistProUQQaQbEtaPOI -> SetYTitle("<*>");
+ fHistProUQQaQbEtaPOI -> SetXTitle("<Qu QaQb>");
+ fHistList->Add(fHistProUQQaQbEtaPOI);
+
+ TString weightFlag[3] = {"w_Qu_","w_Qu^2_","w_QuQaQb_"};
+ for(Int_t i=0;i<3;i++)
+ {
+ fHistSumOfWeightsPtRP[i] = new TH1D(Form("Flow_SumOfWeights%dPtRP_SP",weightFlag[i].Data()),
+ Form("Flow_SumOfWeights%dPtRP_SP",weightFlag[i].Data()),iNbinsPt,dPtMin,dPtMax);
+ fHistSumOfWeightsPtRP[i] -> SetYTitle("sum (*)");
+ fHistSumOfWeightsPtRP[i] -> SetXTitle("p_{T}");
+ fHistList->Add(fHistSumOfWeightsPtRP[i]);
+
+ fHistSumOfWeightsEtaRP[i] = new TH1D(Form("Flow_SumOfWeights%dEtaRP_SP",weightFlag[i].Data()),
+ Form("Flow_SumOfWeights%dEtaRP_SP",weightFlag[i].Data()),iNbinsEta,dEtaMin,dEtaMax);
+ fHistSumOfWeightsEtaRP[i] -> SetYTitle("sum (*)");
+ fHistSumOfWeightsEtaRP[i] -> SetXTitle("#eta");
+ fHistList->Add(fHistSumOfWeightsEtaRP[i]);
+
+ fHistSumOfWeightsPtPOI[i] = new TH1D(Form("Flow_SumOfWeights%dPtPOI_SP",weightFlag[i].Data()),
+ Form("Flow_SumOfWeights%dPtPOI_SP",weightFlag[i].Data()),iNbinsPt,dPtMin,dPtMax);
+ fHistSumOfWeightsPtPOI[i] -> SetYTitle("sum (*)");
+ fHistSumOfWeightsPtPOI[i] -> SetXTitle("p_{T}");
+ fHistList->Add(fHistSumOfWeightsPtPOI[i]);
+
+ fHistSumOfWeightsEtaPOI[i] = new TH1D(Form("Flow_SumOfWeights%dEtaPOI_SP",weightFlag[i].Data()),
+ Form("Flow_SumOfWeights%dEtaPOI_SP",weightFlag[i].Data()),iNbinsEta,dEtaMin,dEtaMax);
+ fHistSumOfWeightsEtaPOI[i] -> SetYTitle("sum (*)");
+ fHistSumOfWeightsEtaPOI[i] -> SetXTitle("#eta");
+ fHistList->Add(fHistSumOfWeightsEtaPOI[i]);
+ }
+
fCommonHists = new AliFlowCommonHist("AliFlowCommonHistSP");
fHistList->Add(fCommonHists);
fCommonHistsRes = new AliFlowCommonHistResults("AliFlowCommonHistResultsSP");
fHistList->Add(fCommonHistsRes);
+ //weights
+ if(fUsePhiWeights) {
+ if(!fWeightsList) {
+ cout<<"WARNING: fWeightsList is NULL in the Scalar Product method."<<endl;
+ exit(0);
+ }
+ if(fWeightsList->FindObject("phi_weights")) {
+ fPhiWeights = dynamic_cast<TH1F*>(fWeightsList->FindObject("phi_weights"));
+ fHistList->Add(fPhiWeights);
+ } else {
+ cout<<"WARNING: histogram with phi weights is not accessible in Scalar Product"<<endl;
+ exit(0);
+ }
+ } // end of if(fUsePhiWeights)
+
fEventNumber = 0; //set number of events to zero
}
//-----------------------------------------------------------------------
-
void AliFlowAnalysisWithScalarProduct::Make(AliFlowEventSimple* anEvent) {
- //Fill histogram
+ //Calculate flow based on <QaQb/MaMb> = <v^2>\r
+
+ //Fill histograms
if (anEvent) {
//fill control histograms
fCommonHists->FillControlHistograms(anEvent);
+
+ //get Q vectors for the eta-subevents
+ AliFlowVector* vQarray = new AliFlowVector[2];
+ if (fUsePhiWeights) {
+ anEvent->Get2Qsub(vQarray,2,fWeightsList,kTRUE);
+ } else {
+ anEvent->Get2Qsub(vQarray);
+ }
+ //subevent a
+ AliFlowVector vQa = vQarray[0];
+ //subevent b
+ AliFlowVector vQb = vQarray[1];
+
+ //get total Q vector = the sum of subevent a and subevent b
+ AliFlowVector vQ = vQa + vQb;
+ //weight the Q vectors for the subevents by the multiplicity
+ //Note: Weight Q only in the particle loop when it is clear if it should be (m-1) or M
+ Double_t dQXa = 0;
+ Double_t dQYa = 0;
+ Double_t dMa = vQa.GetMult();
+ if (dMa != 0) {
+ dQXa = vQa.X()/dMa;
+ dQYa = vQa.Y()/dMa;
+ } else {cout<<"empty subevent"<<endl; }
+ vQa.Set(dQXa,dQYa);
+
+ Double_t dQXb = 0;
+ Double_t dQYb = 0;
+ Double_t dMb = vQb.GetMult();
+ if (dMb != 0) {
+ dQXb = vQb.X()/dMb;
+ dQYb = vQb.Y()/dMb;
+ } else {cout<<"empty subevent"<<endl; }
+ vQb.Set(dQXb,dQYb);
- //get the Q vector from the FlowEvent
- AliFlowVector vQ = anEvent->GetQ();
- fHistProM -> Fill(1,vQ.GetMult()-1);
- //get Q vectors for the subevents
- AliFlowVector vQa = anEvent->GetQsub(-0.9,-0.1);
- AliFlowVector vQb = anEvent->GetQsub(0.1,0.9);
- fHistProM -> Fill(2,vQa.GetMult()*vQb.GetMult());
- Double_t dQaQb = vQa*vQb;
- fHistProQaQb -> Fill(0.,dQaQb);
-
+
+ //scalar product of the two subevents
+ Double_t dQaQb = (vQa*vQb);
+ fHistProQaQb -> Fill(1.,dQaQb,dMa*dMb); //Fill (QaQb/MaMb) with weight (MaMb).
+ //needed for the error calculation:
+ fHistSumOfLinearWeights -> Fill(0.,dMa*dMb);
+ fHistSumOfQuadraticWeights -> Fill(0.,pow(dMa*dMb,2.));
+
+
//loop over the tracks of the event
AliFlowTrackSimple* pTrack = NULL;
Int_t iNumberOfTracks = anEvent->NumberOfTracks();
+ Double_t dMq = vQ.GetMult();
+
for (Int_t i=0;i<iNumberOfTracks;i++)
{
pTrack = anEvent->GetTrack(i) ;
if (pTrack){
Double_t dPhi = pTrack->Phi();
+ //set default phi weight to 1
+ Double_t dW = 1.;
+ //phi weight of pTrack
+ if(fUsePhiWeights && fPhiWeights) {
+ Int_t iNBinsPhi = fPhiWeights->GetNbinsX();
+ dW = fPhiWeights->GetBinContent(1+(Int_t)(TMath::Floor(dPhi*iNBinsPhi/TMath::TwoPi())));
+ //bin = 1 + value*nbins/range
+ //TMath::Floor rounds to the lower integer
+ }
+
//calculate vU
TVector2 vU;
Double_t dUX = TMath::Cos(2*dPhi);
if (dModulus!=0.) vU.Set(dUX/dModulus,dUY/dModulus); // make length 1
else cerr<<"dModulus is zero!"<<endl;
- TVector2 vQm = vQ;
- //subtrackt particle from the flowvector if used to define it
- if (pTrack->InRPSelection()) {
- Double_t dQmX = vQm.X() - dUX;
- Double_t dQmY = vQm.Y() - dUY;
+ //redefine the Q vector and devide by its multiplicity
+ TVector2 vQm;
+ Double_t dQmX = 0.;
+ Double_t dQmY = 0.;
+ //subtract particle from the flowvector if used to define it
+ if (pTrack->InSubevent(0) || pTrack->InSubevent(1)) {
+ dQmX = (vQ.X() - dW*dUX)/(dMq-1);
+ dQmY = (vQ.Y() - dW*dUY)/(dMq-1);
+
vQm.Set(dQmX,dQmY);
- }
-
- //dUQ = scalar product of vU and vQm
- Double_t dUQ = vU * vQm;
- Double_t dPt = pTrack->Pt();
- Double_t dEta = pTrack->Eta();
- //fill the profile histograms
- if (pTrack->InRPSelection()) {
- fHistProUQetaRP -> Fill(dEta,dUQ);
- fHistProUQPtRP -> Fill(dPt,dUQ);
- }
- if (pTrack->InPOISelection()) {
- fHistProUQetaPOI -> Fill(dEta,dUQ);
- fHistProUQPtPOI -> Fill(dPt,dUQ);
- }
- }//track selected
+
+ //dUQ = scalar product of vU and vQm
+ Double_t dUQ = (vU * vQm);
+ Double_t dPt = pTrack->Pt();
+ Double_t dEta = pTrack->Eta();
+ //fill the profile histograms
+ if (pTrack->InRPSelection()) {
+ fHistProUQetaRP -> Fill(dEta,dUQ,(dMq-1)); //Fill (Qu/(Mq-1)) with weight (Mq-1)
+ //needed for the error calculation:
+ fHistProUQQaQbEtaRP -> Fill(dEta,dUQ*dQaQb,(dMq-1)*dMa*dMb); //Fill [Qu/(Mq-1)]*[QaQb/MaMb] with weight (Mq-1)MaMb
+ fHistProUQPtRP -> Fill(dPt,dUQ,(dMq-1)); //Fill (Qu/(Mq-1)) with weight (Mq-1)
+ fHistProUQQaQbPtRP -> Fill(dPt,dUQ*dQaQb,(dMq-1)*dMa*dMb); //Fill [Qu/(Mq-1)]*[QaQb/MaMb] with weight (Mq-1)MaMb
+
+ fHistSumOfWeightsEtaRP[0]->Fill(dEta,(dMq-1)); // sum of Mq-1
+ fHistSumOfWeightsEtaRP[1]->Fill(dEta,pow((dMq-1),2.));// sum of (Mq-1)^2
+ fHistSumOfWeightsEtaRP[2]->Fill(dEta,(dMq-1)*dMa*dMb);// sum of (Mq-1)*MaMb
+ fHistSumOfWeightsPtRP[0]->Fill(dPt,(dMq-1)); // sum of Mq-1
+ fHistSumOfWeightsPtRP[1]->Fill(dPt,pow((dMq-1),2.)); // sum of (Mq-1)^2
+ fHistSumOfWeightsPtRP[2]->Fill(dPt,(dMq-1)*dMa*dMb); // sum of (Mq-1)*MaMb
+ }
+ if (pTrack->InPOISelection()) {
+ fHistProUQetaPOI -> Fill(dEta,dUQ,(dMq-1));//Fill (Qu/(Mq-1)) with weight (Mq-1)
+ //needed for the error calculation:
+ fHistProUQQaQbEtaPOI -> Fill(dEta,dUQ*dQaQb,(dMq-1)*dMa*dMb); //Fill [Qu/(Mq-1)]*[QaQb/MaMb] with weight (Mq-1)MaMb
+ fHistProUQPtPOI -> Fill(dPt,dUQ,(dMq-1)); //Fill (Qu/(Mq-1)) with weight (Mq-1)
+ fHistProUQQaQbPtPOI -> Fill(dPt,dUQ*dQaQb,(dMq-1)*dMa*dMb); //Fill [Qu/(Mq-1)]*[QaQb/MaMb] with weight (Mq-1)MaMb
+
+ fHistSumOfWeightsEtaPOI[0]->Fill(dEta,(dMq-1)); // sum of Mq-1
+ fHistSumOfWeightsEtaPOI[1]->Fill(dEta,pow((dMq-1),2.));// sum of (Mq-1)^2
+ fHistSumOfWeightsEtaPOI[2]->Fill(dEta,(dMq-1)*dMa*dMb);// sum of (Mq-1)*MaMb
+ fHistSumOfWeightsPtPOI[0]->Fill(dPt,(dMq-1)); // sum of Mq-1
+ fHistSumOfWeightsPtPOI[1]->Fill(dPt,pow((dMq-1),2.)); // sum of (Mq-1)^2
+ fHistSumOfWeightsPtPOI[2]->Fill(dPt,(dMq-1)*dMa*dMb); // sum of (Mq-1)*MaMb
+ }
+
+ } else { //do not subtract the particle from the flowvector
+ dQmX = vQ.X()/dMq;
+ dQmY = vQ.Y()/dMq;
+
+ vQm.Set(dQmX,dQmY);
+
+ //dUQ = scalar product of vU and vQm
+ Double_t dUQ = (vU * vQm);
+ Double_t dPt = pTrack->Pt();
+ Double_t dEta = pTrack->Eta();
+ //fill the profile histograms
+ if (pTrack->InRPSelection()) {
+ fHistProUQetaRP -> Fill(dEta,dUQ,dMq); //Fill (Qu/Mq) with weight Mq
+ //needed for the error calculation:
+ fHistProUQQaQbEtaRP -> Fill(dEta,dUQ*dQaQb,dMq*dMa*dMb); //Fill [Qu/Mq]*[QaQb/MaMb] with weight Mq*MaMb
+ fHistProUQPtRP -> Fill(dPt,dUQ,dMq); //Fill (Qu/Mq) with weight Mq
+ fHistProUQQaQbPtRP -> Fill(dPt,dUQ*dQaQb,dMq*dMa*dMb); //Fill [Qu/Mq]*[QaQb/MaMb] with weight Mq*MaMb
+
+ fHistSumOfWeightsEtaRP[0]->Fill(dEta,dMq); // sum of Mq
+ fHistSumOfWeightsEtaRP[1]->Fill(dEta,pow(dMq,2.));// sum of Mq^2
+ fHistSumOfWeightsEtaRP[2]->Fill(dEta,dMq*dMa*dMb);// sum of Mq*MaMb
+ fHistSumOfWeightsPtRP[0]->Fill(dPt,dMq); // sum of Mq
+ fHistSumOfWeightsPtRP[1]->Fill(dPt,pow(dMq,2.)); // sum of Mq^2
+ fHistSumOfWeightsPtRP[2]->Fill(dPt,dMq*dMa*dMb); // sum of Mq*MaMb
+ }
+ if (pTrack->InPOISelection()) {
+ fHistProUQetaPOI -> Fill(dEta,dUQ,dMq); //Fill (Qu/Mq) with weight Mq
+ //needed for the error calculation:
+ fHistProUQQaQbEtaPOI -> Fill(dEta,dUQ*dQaQb,dMq*dMa*dMb); //Fill [Qu/Mq]*[QaQb/MaMb] with weight Mq*MaMb
+ fHistProUQPtPOI -> Fill(dPt,dUQ,dMq); //Fill (Qu/Mq) with weight Mq
+ fHistProUQQaQbPtPOI -> Fill(dPt,dUQ*dQaQb,dMq*dMa*dMb); //Fill [Qu/Mq]*[QaQb/MaMb] with weight Mq*MaMb
+
+ fHistSumOfWeightsEtaPOI[0]->Fill(dEta,dMq); // sum of Mq
+ fHistSumOfWeightsEtaPOI[1]->Fill(dEta,pow(dMq,2.));// sum of Mq^2
+ fHistSumOfWeightsEtaPOI[2]->Fill(dEta,dMq*dMa*dMb);// sum of Mq*MaMb
+ fHistSumOfWeightsPtPOI[0]->Fill(dPt,dMq); // sum of Mq
+ fHistSumOfWeightsPtPOI[1]->Fill(dPt,pow(dMq,2.)); // sum of Mq^2
+ fHistSumOfWeightsPtPOI[2]->Fill(dPt,dMq*dMa*dMb); // sum of Mq*MaMb
+ }
+ }//track not in subevents
+
+ }//track
+
}//loop over tracks
-
+
fEventNumber++;
// cout<<"@@@@@ "<<fEventNumber<<" events processed"<<endl;
+ delete [] vQarray;
}
}
- //--------------------------------------------------------------------
+//--------------------------------------------------------------------
void AliFlowAnalysisWithScalarProduct::GetOutputHistograms(TList *outputListHistos){
//get pointers to all output histograms (called before Finish())
+
if (outputListHistos) {
//Get the common histograms from the output list
AliFlowCommonHist *pCommonHist = dynamic_cast<AliFlowCommonHist*>
AliFlowCommonHistResults *pCommonHistResults = dynamic_cast<AliFlowCommonHistResults*>
(outputListHistos->FindObject("AliFlowCommonHistResultsSP"));
TProfile* pHistProQaQb = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_QaQb_SP"));
- TProfile* pHistProM = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_M_SP"));
TProfile* pHistProUQetaRP = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQetaRP_SP"));
TProfile* pHistProUQetaPOI = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQetaPOI_SP"));
TProfile* pHistProUQPtRP = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQPtRP_SP"));
TProfile* pHistProUQPtPOI = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQPtPOI_SP"));
- if (pCommonHist && pCommonHistResults && pHistProQaQb && pHistProM &&
- pHistProUQetaRP && pHistProUQetaPOI && pHistProUQPtRP && pHistProUQPtPOI) {
+ TH1D* pHistSumOfLinearWeights = dynamic_cast<TH1D*>(outputListHistos->FindObject("Flow_SumOfLinearWeights_SP"));
+ TH1D* pHistSumOfQuadraticWeights = dynamic_cast<TH1D*>(outputListHistos->FindObject("Flow_SumOfQuadraticWeights_SP"));
+ TProfile* pHistProUQQaQbPtRP = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQQaQbPtRP_SP"));
+ TProfile* pHistProUQQaQbEtaRP = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQQaQbEtaRP_SP"));
+ TProfile* pHistProUQQaQbPtPOI = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQQaQbPtPOI_SP"));
+ TProfile* pHistProUQQaQbEtaPOI = dynamic_cast<TProfile*>(outputListHistos->FindObject("Flow_UQQaQbEtaPOI_SP"));
+
+ TString weightFlag[3] = {"w_Qu_","w_Qu^2_","w_QuQaQb_"};
+ TH1D* pHistSumOfWeightsPtRP[3] = {NULL};
+ TH1D* pHistSumOfWeightsEtaRP[3] = {NULL};
+ TH1D* pHistSumOfWeightsPtPOI[3] = {NULL};
+ TH1D* pHistSumOfWeightsEtaPOI[3] = {NULL};
+ for(Int_t i=0;i<3;i++)
+ {
+ pHistSumOfWeightsPtRP[i] = dynamic_cast<TH1D*>(outputListHistos->FindObject(Form("Flow_SumOfWeights%dPtRP_SP",weightFlag[i].Data())));
+ pHistSumOfWeightsEtaRP[i] = dynamic_cast<TH1D*>(outputListHistos->FindObject(Form("Flow_SumOfWeights%dEtaRP_SP",weightFlag[i].Data())));
+ pHistSumOfWeightsPtPOI[i] = dynamic_cast<TH1D*>(outputListHistos->FindObject(Form("Flow_SumOfWeights%dPtPOI_SP",weightFlag[i].Data())));
+ pHistSumOfWeightsEtaPOI[i] = dynamic_cast<TH1D*>(outputListHistos->FindObject(Form("Flow_SumOfWeights%dEtaPOI_SP",weightFlag[i].Data())));
+ }
+
+ //pass the pointers to the task
+ if (pCommonHist && pCommonHistResults && pHistProQaQb &&
+ pHistProUQetaRP && pHistProUQetaPOI && pHistProUQPtRP && pHistProUQPtPOI
+ && pHistSumOfLinearWeights && pHistSumOfQuadraticWeights && pHistProUQQaQbPtRP
+ && pHistProUQQaQbEtaRP && pHistProUQQaQbPtPOI && pHistProUQQaQbEtaPOI) {
this -> SetCommonHists(pCommonHist);
this -> SetCommonHistsRes(pCommonHistResults);
this -> SetHistProQaQb(pHistProQaQb);
- this -> SetHistProM(pHistProM);
this -> SetHistProUQetaRP(pHistProUQetaRP);
this -> SetHistProUQetaPOI(pHistProUQetaPOI);
this -> SetHistProUQPtRP(pHistProUQPtRP);
this -> SetHistProUQPtPOI(pHistProUQPtPOI);
+ this -> SetHistProUQQaQbPtRP(pHistProUQQaQbPtRP);
+ this -> SetHistProUQQaQbEtaRP(pHistProUQQaQbEtaRP);
+ this -> SetHistProUQQaQbPtPOI(pHistProUQQaQbPtPOI);
+ this -> SetHistProUQQaQbEtaPOI(pHistProUQQaQbEtaPOI);
+ this -> SetHistSumOfLinearWeights(pHistSumOfLinearWeights);
+ this -> SetHistSumOfQuadraticWeights(pHistSumOfQuadraticWeights);
}
- }
+
+ for(Int_t i=0;i<3;i++)
+ {
+ if(pHistSumOfWeightsPtRP[i]) this -> SetHistSumOfWeightsPtRP(pHistSumOfWeightsPtRP[i],i);
+ if(pHistSumOfWeightsEtaRP[i]) this -> SetHistSumOfWeightsPtRP(pHistSumOfWeightsEtaRP[i],i);
+ if(pHistSumOfWeightsPtPOI[i]) this -> SetHistSumOfWeightsPtRP(pHistSumOfWeightsPtPOI[i],i);
+ if(pHistSumOfWeightsEtaPOI[i]) this -> SetHistSumOfWeightsPtRP(pHistSumOfWeightsEtaPOI[i],i);
+ }
+
+ } // end of if(outputListHistos)
}
//--------------------------------------------------------------------
void AliFlowAnalysisWithScalarProduct::Finish() {
- //calculate flow and fill the AliFlowCommonHistResults
+ //calculate flow and fill the AliFlowCommonHistResults\r
if (fDebug) cout<<"AliFlowAnalysisWithScalarProduct::Finish()"<<endl;
cout<<"*************************************"<<endl;
cout<<" Scalar product "<<endl;
cout<<endl;
- Int_t iNbinsPt = AliFlowCommonConstants::GetNbinsPt();
- Int_t iNbinsEta = AliFlowCommonConstants::GetNbinsEta();
-
- Double_t dMmin1 = fHistProM->GetBinContent(1); //average over M-1
- Double_t dMmin1Err = fHistProM->GetBinError(1); //error on average over M-1
- Double_t dMaMb = fHistProM->GetBinContent(2); //average over Ma*Mb
- Double_t dMaMbErr = fHistProM->GetBinError(2); //error on average over Ma*Mb
-
- Double_t dMcorrection = 0.; //correction factor for Ma != Mb
- Double_t dMcorrectionErr = 0.;
- Double_t dMcorrectionErrRel = 0.;
- Double_t dMcorrectionErrRel2 = 0.;
-
- if (dMaMb != 0. && dMmin1 != 0.) {
- dMcorrection = dMmin1/(TMath::Sqrt(dMaMb));
- dMcorrectionErr = dMcorrection*(dMmin1Err/dMmin1 + dMaMbErr/(2*dMaMb));
- dMcorrectionErrRel = dMcorrectionErr/dMcorrection;
- dMcorrectionErrRel2 = dMcorrectionErrRel*dMcorrectionErrRel;
+ Int_t iNbinsPt = AliFlowCommonConstants::GetMaster()->GetNbinsPt();
+ Int_t iNbinsEta = AliFlowCommonConstants::GetMaster()->GetNbinsEta();
+
+
+ //Calculate reference flow (noname)
+ //----------------------------------
+ //weighted average over (QaQb/MaMb) with weight (MaMb)
+ Double_t dQaQb = fHistProQaQb->GetBinContent(1);
+ Double_t dV = TMath::Sqrt(dQaQb);
+ //statistical error of dQaQb:
+ // statistical error = term1 * spread * term2:
+ // term1 = sqrt{sum_{i=1}^{N} w^2}/(sum_{i=1}^{N} w)
+ // term2 = 1/sqrt(1-term1^2)
+ Double_t dSpreadQaQb = fHistProQaQb->GetBinError(1);
+ Double_t dSumOfLinearWeights = fHistSumOfLinearWeights->GetBinContent(1);
+ Double_t dSumOfQuadraticWeights = fHistSumOfQuadraticWeights->GetBinContent(1);
+ Double_t dTerm1 = 0.;
+ Double_t dTerm2 = 0.;
+ if(dSumOfLinearWeights) {
+ dTerm1 = pow(dSumOfQuadraticWeights,0.5)/dSumOfLinearWeights;
}
-
- Double_t dQaQbAv = fHistProQaQb->GetBinContent(1); //average over events
- Double_t dQaQbErr = fHistProQaQb->GetBinError(1);
- Double_t dQaQbErrRel = 0.;
- if (dQaQbAv != 0.) {
- dQaQbErrRel = dQaQbErr/dQaQbAv; }
- Double_t dQaQbErrRel2 = dQaQbErrRel*dQaQbErrRel;
-
- if (dQaQbAv <= 0.){
- //set v to -0
- fCommonHistsRes->FillIntegratedFlowRP(-0.,0.);
- fCommonHistsRes->FillIntegratedFlow(-0.,0.);
- cout<<"dV(RP) = -0. +- 0."<<endl;
- fCommonHistsRes->FillIntegratedFlowPOI(-0.,0.);
- cout<<"dV(POI) = -0. +- 0."<<endl;
- } else {
- Double_t dQaQbSqrt = TMath::Sqrt(dQaQbAv);
- if (dMaMb>0.) { dQaQbSqrt *= dMcorrection; }
- else { dQaQbSqrt = 0.; }
- Double_t dQaQbSqrtErrRel2 = dMcorrectionErrRel2 + (1/4)*dQaQbErrRel2;
-
- //v as a function of eta for RP selection
- for(Int_t b=0;b<iNbinsEta;b++) {
- Double_t duQpro = fHistProUQetaRP->GetBinContent(b);
- Double_t duQerr = fHistProUQetaRP->GetBinError(b); //copy error for now
- Double_t duQerrRel = 0.;
- if (duQpro != 0.) {duQerrRel = duQerr/duQpro;}
- Double_t duQerrRel2 = duQerrRel*duQerrRel;
-
- Double_t dv2pro = 0.;
- if (dQaQbSqrt!=0.) { dv2pro = duQpro/dQaQbSqrt; }
- Double_t dv2errRel2 = duQerrRel2 + dQaQbSqrtErrRel2;
- Double_t dv2errRel = 0.;
- if (dv2errRel2>0.) { dv2errRel = TMath::Sqrt(dv2errRel2); }
- Double_t dv2err = dv2pro*dv2errRel;
- //fill TH1D
- fCommonHistsRes->FillDifferentialFlowEtaRP(b, dv2pro, dv2err);
- } //loop over bins b
-
- //v as a function of eta for POI selection
- for(Int_t b=0;b<iNbinsEta;b++) {
- Double_t duQpro = fHistProUQetaPOI->GetBinContent(b);
- Double_t duQerr = fHistProUQetaPOI->GetBinError(b); //copy error for now
- Double_t duQerrRel = 0.;
- if (duQpro != 0.) {duQerrRel = duQerr/duQpro;}
- Double_t duQerrRel2 = duQerrRel*duQerrRel;
-
- Double_t dv2pro = 0.;
- if (dQaQbSqrt!=0.) { dv2pro = duQpro/dQaQbSqrt; }
- Double_t dv2errRel2 = duQerrRel2 + dQaQbSqrtErrRel2;
- Double_t dv2errRel = 0.;
- if (dv2errRel2>0.) { dv2errRel = TMath::Sqrt(dv2errRel2); }
- Double_t dv2err = dv2pro*dv2errRel;
- //fill TH1D
- fCommonHistsRes->FillDifferentialFlowEtaPOI(b, dv2pro, dv2err);
- } //loop over bins b
+ if(1.-pow(dTerm1,2.) > 0.) {
+ dTerm2 = 1./pow(1-pow(dTerm1,2.),0.5);
+ }
+ Double_t dStatErrorQaQb = dTerm1 * dSpreadQaQb * dTerm2;
+ //calculate the statistical error
+ Double_t dVerr = 0.;
+ if(dQaQb > 0.) {
+ dVerr = (1./(2.*pow(dQaQb,0.5)))*dStatErrorQaQb;
+ }
+ fCommonHistsRes->FillIntegratedFlow(dV,dVerr);
+ cout<<"dV = "<<dV<<" +- "<<dVerr<<endl;
+
+ //Calculate differential flow and integrated flow (RP, POI)
+ //---------------------------------------------------------
+
+ //v as a function of eta for RP selection
+ for(Int_t b=0;b<iNbinsEta;b++) {
+ Double_t duQpro = fHistProUQetaRP->GetBinContent(b);
+ Double_t dv2pro = 0.;
+ if (dV!=0.) { dv2pro = duQpro/dV; }
+ //calculate the statistical error
+ Double_t dv2ProErr = CalculateStatisticalError(b, dStatErrorQaQb, fHistProUQetaRP, fHistProUQQaQbEtaRP, fHistSumOfWeightsEtaRP);
- //v as a function of Pt for RP selection
- TH1F* fHistPtRP = fCommonHists->GetHistPtRP(); //for calculating integrated flow
- Double_t dVRP = 0.;
- Double_t dSum = 0.;
- Double_t dErrV =0.;
-
- for(Int_t b=0;b<iNbinsPt;b++) {
- Double_t duQpro = fHistProUQPtRP->GetBinContent(b);
- Double_t duQerr = fHistProUQPtRP->GetBinError(b); //copy error for now
- Double_t duQerrRel = 0.;
- if (duQpro != 0.) {duQerrRel = duQerr/duQpro;}
- Double_t duQerrRel2 = duQerrRel*duQerrRel;
-
- Double_t dv2pro = 0.;
- if (dQaQbSqrt!=0.) { dv2pro = duQpro/dQaQbSqrt; }
- Double_t dv2errRel2 = duQerrRel2 + dQaQbSqrtErrRel2;
- Double_t dv2errRel = 0.;
- if (dv2errRel2>0.) { dv2errRel = TMath::Sqrt(dv2errRel2); }
- Double_t dv2err = dv2pro*dv2errRel;
- //fill TH1D
- fCommonHistsRes->FillDifferentialFlowPtRP(b, dv2pro, dv2err);
- //calculate integrated flow for RP selection
- if (fHistPtRP){
- Double_t dYieldPt = fHistPtRP->GetBinContent(b);
- dVRP += dv2pro*dYieldPt;
- dSum +=dYieldPt;
- dErrV += dYieldPt*dYieldPt*dv2err*dv2err;
- } else { cout<<"fHistPtRP is NULL"<<endl; }
- } //loop over bins b
-
- if (dSum != 0.) {
- dVRP /= dSum; //the pt distribution should be normalised
- dErrV /= (dSum*dSum);
- dErrV = TMath::Sqrt(dErrV);
- }
- fCommonHistsRes->FillIntegratedFlowRP(dVRP,dErrV);
- fCommonHistsRes->FillIntegratedFlow(dVRP,dErrV);
-
- cout<<"dV(RP) = "<<dVRP<<" +- "<<dErrV<<endl;
-
- //v as a function of Pt for POI selection
- TH1F* fHistPtPOI = fCommonHists->GetHistPtPOI(); //for calculating integrated flow
- Double_t dVPOI = 0.;
- dSum = 0.;
- dErrV =0.;
+ //fill TH1D
+ fCommonHistsRes->FillDifferentialFlowEtaRP(b, dv2pro, dv2ProErr);
+ } //loop over bins b
- for(Int_t b=0;b<iNbinsPt;b++) {
- Double_t duQpro = fHistProUQPtPOI->GetBinContent(b);
- Double_t duQerr = fHistProUQPtPOI->GetBinError(b); //copy error for now
- Double_t duQerrRel = 0.;
- if (duQpro != 0.) {duQerrRel = duQerr/duQpro;}
- Double_t duQerrRel2 = duQerrRel*duQerrRel;
-
- Double_t dv2pro = 0.;
- if (dQaQbSqrt!=0.) { dv2pro = duQpro/dQaQbSqrt; }
- Double_t dv2errRel2 = duQerrRel2 + dQaQbSqrtErrRel2;
- Double_t dv2errRel = 0.;
- if (dv2errRel2>0.) { dv2errRel = TMath::Sqrt(dv2errRel2); }
- Double_t dv2err = dv2pro*dv2errRel;
- //fill TH1D
- fCommonHistsRes->FillDifferentialFlowPtPOI(b, dv2pro, dv2err);
-
- //calculate integrated flow for POI selection
- if (fHistPtPOI){
- Double_t dYieldPt = fHistPtPOI->GetBinContent(b);
- dVPOI += dv2pro*dYieldPt;
- dSum +=dYieldPt;
- dErrV += dYieldPt*dYieldPt*dv2err*dv2err;
- } else { cout<<"fHistPtPOI is NULL"<<endl; }
- } //loop over bins b
-
- if (dSum != 0.) {
- dVPOI /= dSum; //the pt distribution should be normalised
- dErrV /= (dSum*dSum);
- dErrV = TMath::Sqrt(dErrV);
- }
- fCommonHistsRes->FillIntegratedFlowPOI(dVPOI,dErrV);
- cout<<"dV(POI) = "<<dVPOI<<" +- "<<dErrV<<endl;
+ //v as a function of eta for POI selection
+ for(Int_t b=0;b<iNbinsEta;b++) {
+ Double_t duQpro = fHistProUQetaPOI->GetBinContent(b);
+ Double_t dv2pro = 0.;
+ if (dV!=0.) { dv2pro = duQpro/dV; }
+ //calculate the statistical error
+ Double_t dv2ProErr = CalculateStatisticalError(b, dStatErrorQaQb, fHistProUQetaPOI, fHistProUQQaQbEtaPOI, fHistSumOfWeightsEtaPOI);
+
+ //fill TH1D
+ fCommonHistsRes->FillDifferentialFlowEtaPOI(b, dv2pro, dv2ProErr);
+ } //loop over bins b
+
+
+ //v as a function of Pt for RP selection
+ TH1F* fHistPtRP = fCommonHists->GetHistPtRP(); //for calculating integrated flow
+ Double_t dVRP = 0.;
+ Double_t dSumRP = 0.;
+ Double_t dErrVRP =0.;
+
+ for(Int_t b=0;b<iNbinsPt;b++) {
+ Double_t duQpro = fHistProUQPtRP->GetBinContent(b);
+ Double_t dv2pro = 0.;
+ if (dV!=0.) { dv2pro = duQpro/dV; }
+ //calculate the statistical error
+ Double_t dv2ProErr = CalculateStatisticalError(b, dStatErrorQaQb, fHistProUQPtRP, fHistProUQQaQbPtRP, fHistSumOfWeightsPtRP);
+
+ //fill TH1D
+ fCommonHistsRes->FillDifferentialFlowPtRP(b, dv2pro, dv2ProErr);
+
+ //calculate integrated flow for RP selection
+ if (fHistPtRP){
+ Double_t dYieldPt = fHistPtRP->GetBinContent(b);
+ dVRP += dv2pro*dYieldPt;
+ dSumRP +=dYieldPt;
+ dErrVRP += dYieldPt*dYieldPt*dv2ProErr*dv2ProErr;
+ } else { cout<<"fHistPtRP is NULL"<<endl; }
+ } //loop over bins b
+
+ if (dSumRP != 0.) {
+ dVRP /= dSumRP; //the pt distribution should be normalised
+ dErrVRP /= (dSumRP*dSumRP);
+ dErrVRP = TMath::Sqrt(dErrVRP);
}
+ fCommonHistsRes->FillIntegratedFlowRP(dVRP,dErrVRP);
+ cout<<"dV(RP) = "<<dVRP<<" +- "<<dErrVRP<<endl;
+
+
+ //v as a function of Pt for POI selection
+ TH1F* fHistPtPOI = fCommonHists->GetHistPtPOI(); //for calculating integrated flow
+ Double_t dVPOI = 0.;
+ Double_t dSumPOI = 0.;
+ Double_t dErrVPOI =0.;
+
+ for(Int_t b=0;b<iNbinsPt;b++) {
+ Double_t duQpro = fHistProUQPtPOI->GetBinContent(b);
+ Double_t dv2pro = 0.;
+ if (dV!=0.) { dv2pro = duQpro/dV; }
+ //calculate the statistical error
+ Double_t dv2ProErr = CalculateStatisticalError(b, dStatErrorQaQb, fHistProUQPtPOI, fHistProUQQaQbPtPOI, fHistSumOfWeightsPtPOI);
+
+ //fill TH1D
+ fCommonHistsRes->FillDifferentialFlowPtPOI(b, dv2pro, dv2ProErr);
+
+ //calculate integrated flow for POI selection
+ if (fHistPtPOI){
+ Double_t dYieldPt = fHistPtPOI->GetBinContent(b);
+ dVPOI += dv2pro*dYieldPt;
+ dSumPOI +=dYieldPt;
+ dErrVPOI += dYieldPt*dYieldPt*dv2ProErr*dv2ProErr;
+ } else { cout<<"fHistPtPOI is NULL"<<endl; }
+ } //loop over bins b
+
+ if (dSumPOI != 0.) {
+ dVPOI /= dSumPOI; //the pt distribution should be normalised\r
+ dErrVPOI /= (dSumPOI*dSumPOI);
+ dErrVPOI = TMath::Sqrt(dErrVPOI);
+ }
+ fCommonHistsRes->FillIntegratedFlowPOI(dVPOI,dErrVPOI);
+ cout<<"dV(POI) = "<<dVPOI<<" +- "<<dErrVPOI<<endl;
+
cout<<endl;
cout<<"*************************************"<<endl;
cout<<"*************************************"<<endl;
-
+
//cout<<".....finished"<<endl;
- }
+}
+//--------------------------------------------------------------------
+Double_t AliFlowAnalysisWithScalarProduct::CalculateStatisticalError(Int_t b, Double_t aStatErrorQaQb, TProfile* pHistProUQ, TProfile* pHistProUQQaQb, TH1D** pHistSumOfWeights) {
+
+ //calculate the statistical error for differential flow for bin b
+ Double_t duQproSpread = pHistProUQ->GetBinError(b);
+ Double_t sumOfMq = pHistSumOfWeights[0]->GetBinContent(b);
+ Double_t sumOfMqSquared = pHistSumOfWeights[1]->GetBinContent(b);
+ Double_t dTerm1 = 0.;
+ Double_t dTerm2 = 0.;
+ if(sumOfMq) {
+ dTerm1 = (pow(sumOfMqSquared,0.5)/sumOfMq);
+ }
+ if(1.-pow(dTerm1,2.)>0.) {
+ dTerm2 = 1./pow(1.-pow(dTerm1,2.),0.5);
+ }
+ Double_t duQproErr = dTerm1*duQproSpread*dTerm2;
+
+ // covariances:
+ Double_t dTerm1Cov = pHistSumOfWeights[2]->GetBinContent(b);
+ Double_t dTerm2Cov = fHistSumOfLinearWeights->GetBinContent(1);
+ Double_t dTerm3Cov = sumOfMq;
+ Double_t dWeightedCovariance = 0.;
+ if(dTerm2Cov*dTerm3Cov>0.) {
+ Double_t dDenominator = 1.-dTerm1Cov/(dTerm2Cov*dTerm3Cov);
+ Double_t dPrefactor = dTerm1Cov/(dTerm2Cov*dTerm3Cov);
+ if(dDenominator!=0) {
+ Double_t dCovariance = (pHistProUQQaQb->GetBinContent(b)-fHistProQaQb->GetBinContent(1)*pHistProUQ->GetBinContent(b))/dDenominator;
+ dWeightedCovariance = dCovariance*dPrefactor;
+ }
+ }
+ Double_t dv2ProErr = 0.; // final statitical error:
+ if(fHistProQaQb->GetBinContent(1)>0.) {
+ Double_t dv2ProErrorSquared = (1./4.)*pow(fHistProQaQb->GetBinContent(1),-3.)*
+ (pow(pHistProUQ->GetBinContent(b),2.)*pow(aStatErrorQaQb,2.)
+ + 4.*pow(fHistProQaQb->GetBinContent(1),2.)*pow(duQproErr,2.)
+ - 4.*fHistProQaQb->GetBinContent(1)*pHistProUQ->GetBinContent(b)*dWeightedCovariance);
+ if(dv2ProErrorSquared>0.) dv2ProErr = pow(dv2ProErrorSquared,0.5);
+ }
+
+ return dv2ProErr;
+}
+//--------------------------------------------------------------------
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff