X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ITS%2FAliITSVertexer3D.cxx;h=c152045d0ce653b76cfb7987f53c7fe7cf3afe6f;hb=dcc60657b357cc833961e5204d55578b6b38e753;hp=19cd1a65b1fc63d988268ccf1d3b29502d315460;hpb=ecce5370274c5a43f179d37704b483f22f931c2e;p=u%2Fmrichter%2FAliRoot.git diff --git a/ITS/AliITSVertexer3D.cxx b/ITS/AliITSVertexer3D.cxx index 19cd1a65b1f..c152045d0ce 100644 --- a/ITS/AliITSVertexer3D.cxx +++ b/ITS/AliITSVertexer3D.cxx @@ -13,114 +13,190 @@ * provided "as is" without express or implied warranty. * **************************************************************************/ #include +#include "AliRunLoader.h" #include "AliESDVertex.h" #include "AliLog.h" #include "AliStrLine.h" #include "AliTracker.h" #include "AliITSDetTypeRec.h" #include "AliITSRecPoint.h" +#include "AliITSRecPointContainer.h" #include "AliITSgeomTGeo.h" #include "AliVertexerTracks.h" #include "AliITSVertexer3D.h" #include "AliITSVertexerZ.h" +#include "AliITSSortTrkl.h" ///////////////////////////////////////////////////////////////// // this class implements a method to determine // the 3 coordinates of the primary vertex -// for p-p collisions -// It can be used successfully with Pb-Pb collisions +// optimized for +// p-p collisions //////////////////////////////////////////////////////////////// +const Int_t AliITSVertexer3D::fgkMaxNumOfClDefault = 300; +const Int_t AliITSVertexer3D::fgkMaxNumOfClRebinDefault = 500; +const Int_t AliITSVertexer3D::fgkMaxNumOfClDownscaleDefault = 1000; +const Float_t AliITSVertexer3D::fgk3DBinSizeDefault = 0.1; + ClassImp(AliITSVertexer3D) /* $Id$ */ //______________________________________________________________________ -AliITSVertexer3D::AliITSVertexer3D():AliITSVertexer(), -fLines("AliStrLine",1000), -fVert3D(), -fCoarseDiffPhiCut(0.), -fCoarseMaxRCut(0.), -fMaxRCut(0.), -fZCutDiamond(0.), -fMaxZCut(0.), -fDCAcut(0.), -fDiffPhiMax(0.), -fMeanPSelTrk(0.), -fMeanPtSelTrk(0.) +AliITSVertexer3D::AliITSVertexer3D(): + AliITSVertexer(), + fLines("AliStrLine",1000), + fVert3D(), + fCoarseDiffPhiCut(0.), + fFineDiffPhiCut(0.), + fCutOnPairs(0.), + fCoarseMaxRCut(0.), + fMaxRCut(0.), + fMaxRCut2(0.), + fZCutDiamond(0.), + fMaxZCut(0.), + fDCAcut(0.), + fDiffPhiMax(0.), + fMeanPSelTrk(0.), + fMeanPtSelTrk(0.), + fUsedCluster(kMaxCluPerMod*kNSPDMod), + fZHisto(0), + fDCAforPileup(0.), + fDiffPhiforPileup(0.), + fBinSizeR(0.), + fBinSizeZ(0.), + fPileupAlgo(0), + fMaxNumOfCl(fgkMaxNumOfClDefault), + fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault), + fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault), + fNRecPLay1(0), + fNRecPLay2(0), + f3DBinSize(fgk3DBinSizeDefault), + fDoDownScale(kFALSE), + fGenerForDownScale(0), + f3DPeak(), + fHighMultAlgo(1), + fSwitchAlgorithm(kFALSE) { // Default constructor SetCoarseDiffPhiCut(); + SetFineDiffPhiCut(); + SetCutOnPairs(); SetCoarseMaxRCut(); SetMaxRCut(); + SetMaxRCutAlgo2(); SetZCutDiamond(); SetMaxZCut(); SetDCACut(); SetDiffPhiMax(); SetMeanPSelTracks(); SetMeanPtSelTracks(); + SetMinDCAforPileup(); + SetDeltaPhiforPileup(); + SetPileupAlgo(); + SetBinSizeR(); + SetBinSizeZ(); + Double_t binsize=0.02; // default 200 micron + Int_t nbins=static_cast(1+2*fZCutDiamond/binsize); + fZHisto=new TH1F("hz","",nbins,-fZCutDiamond,-fZCutDiamond+binsize*nbins); + fGenerForDownScale=new TRandom3(987654321); +} + +//______________________________________________________________________ +AliITSVertexer3D::AliITSVertexer3D(TRootIOCtor*): + AliITSVertexer(), + fLines("AliStrLine",1000), + fVert3D(), + fCoarseDiffPhiCut(0.), + fFineDiffPhiCut(0.), + fCutOnPairs(0.), + fCoarseMaxRCut(0.), + fMaxRCut(0.), + fMaxRCut2(0.), + fZCutDiamond(0.), + fMaxZCut(0.), + fDCAcut(0.), + fDiffPhiMax(0.), + fMeanPSelTrk(0.), + fMeanPtSelTrk(0.), + fUsedCluster(kMaxCluPerMod*kNSPDMod), + fZHisto(0), + fDCAforPileup(0.), + fDiffPhiforPileup(0.), + fBinSizeR(0.), + fBinSizeZ(0.), + fPileupAlgo(0), + fMaxNumOfCl(fgkMaxNumOfClDefault), + fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault), + fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault), + fNRecPLay1(0), + fNRecPLay2(0), + f3DBinSize(fgk3DBinSizeDefault), + fDoDownScale(kFALSE), + fGenerForDownScale(0), + f3DPeak(), + fHighMultAlgo(1), + fSwitchAlgorithm(kFALSE) +{ + // I/O constructor + + } //______________________________________________________________________ AliITSVertexer3D::~AliITSVertexer3D() { // Destructor fLines.Clear("C"); + if(fZHisto) delete fZHisto; + if(fGenerForDownScale) delete fGenerForDownScale; } //______________________________________________________________________ void AliITSVertexer3D::ResetVert3D(){ - // + // Reset the fVert3D object and reset the used clusters + ResetVertex(); fVert3D.SetXv(0.); fVert3D.SetYv(0.); fVert3D.SetZv(0.); fVert3D.SetDispersion(0.); fVert3D.SetNContributors(0); + fUsedCluster.ResetAllBits(0); } //______________________________________________________________________ AliESDVertex* AliITSVertexer3D::FindVertexForCurrentEvent(TTree *itsClusterTree){ // Defines the AliESDVertex for the current event ResetVert3D(); AliDebug(1,"FindVertexForCurrentEvent - 3D - PROCESSING NEXT EVENT"); - fLines.Clear(); + fLines.Clear("C"); + fCurrentVertex = NULL; Int_t nolines = FindTracklets(itsClusterTree,0); - fCurrentVertex = 0; + Int_t rc; if(nolines>=2){ - Int_t rc=Prepare3DVertex(0); - if(rc==0) fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); - /* uncomment to debug - printf("Vertex found in first iteration:\n"); - fVert3D.Print(); - printf("Start second iteration\n"); - end of debug lines */ - if(fVert3D.GetNContributors()>0){ - fLines.Clear("C"); - nolines = FindTracklets(itsClusterTree,1); - if(nolines>=2){ - rc=Prepare3DVertex(1); - if(rc==0) fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); + if(fSwitchAlgorithm) { + rc = Prepare3DVertexPbPb(); + FindVertex3D(itsClusterTree); + } else { + rc=Prepare3DVertex(0); + if(fVert3D.GetNContributors()>0){ + fLines.Clear("C"); + nolines = FindTracklets(itsClusterTree,1); + if(nolines>=2){ + rc=Prepare3DVertex(1); + if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative(); + else if(fPileupAlgo!=2 && rc == 0) FindVertex3D(itsClusterTree); + if(rc!=0) fVert3D.SetNContributors(0); // exclude this vertex + } } } - /* uncomment to debug - printf("Vertex found in second iteration:\n"); - fVert3D.Print(); - end of debug lines */ - - Float_t vRadius=TMath::Sqrt(fVert3D.GetXv()*fVert3D.GetXv()+fVert3D.GetYv()*fVert3D.GetYv()); - if(vRadius0){ - Double_t position[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()}; - Double_t covmatrix[6]; - fVert3D.GetCovMatrix(covmatrix); - Double_t chi2=99999.; - Int_t nContr=fVert3D.GetNContributors(); - fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); - fCurrentVertex->SetTitle("vertexer: 3D"); - fCurrentVertex->SetName("SPDVertex3D"); - fCurrentVertex->SetDispersion(fVert3D.GetDispersion()); - } } + if(!fCurrentVertex){ AliITSVertexerZ vertz(GetNominalPos()[0],GetNominalPos()[1]); + vertz.SetDetTypeRec(GetDetTypeRec()); AliDebug(1,"Call Vertexer Z\n"); + vertz.SetLowLimit(-fZCutDiamond); + vertz.SetHighLimit(fZCutDiamond); AliESDVertex* vtxz = vertz.FindVertexForCurrentEvent(itsClusterTree); if(vtxz){ Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],vtxz->GetZv()}; @@ -129,105 +205,448 @@ AliESDVertex* AliITSVertexer3D::FindVertexForCurrentEvent(TTree *itsClusterTree) Double_t chi2=99999.; Int_t nContr=vtxz->GetNContributors(); fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); + fCurrentVertex->SetDispersion(vtxz->GetDispersion()); fCurrentVertex->SetTitle("vertexer: Z"); fCurrentVertex->SetName("SPDVertexZ"); delete vtxz; - // printf("Vertexer Z success\n"); } - } - FindMultiplicity(itsClusterTree); + } + if(fComputeMultiplicity) FindMultiplicity(itsClusterTree); return fCurrentVertex; } +//______________________________________________________________________ +void AliITSVertexer3D::FindVertex3D(TTree *itsClusterTree){ + // Instantiates the fCurrentVertex object. calle by FindVertexForCurrenEvent + Double_t vRadius=TMath::Sqrt(fVert3D.GetXv()*fVert3D.GetXv()+fVert3D.GetYv()*fVert3D.GetYv()); + if(vRadius0){ + Double_t position[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()}; + Double_t covmatrix[6]; + fVert3D.GetCovMatrix(covmatrix); + Double_t chi2=99999.; + Int_t nContr=fVert3D.GetNContributors(); + fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); + fCurrentVertex->SetTitle("vertexer: 3D"); + fCurrentVertex->SetName("SPDVertex3D"); + fCurrentVertex->SetDispersion(fVert3D.GetDispersion()); + fNoVertices=1; + + switch(fPileupAlgo){ + case 0: PileupFromZ(); break; + case 1: FindOther3DVertices(itsClusterTree); break; + case 3: break; // no pileup algo + default: AliError("Wrong pileup algorithm"); break; + } + if(fNoVertices==1){ + fVertArray = new AliESDVertex[1]; + fVertArray[0]=(*fCurrentVertex); + } + } +} + +//______________________________________________________________________ +void AliITSVertexer3D::FindVertex3DIterative(){ + // find vertex if fPileupAlgo == 2 + + Int_t nLines=fLines.GetEntriesFast(); + Int_t maxPoints=nLines*(nLines-1)/2; + Double_t* xP=new Double_t[maxPoints]; + Double_t* yP=new Double_t[maxPoints]; + Double_t* zP=new Double_t[maxPoints]; + Int_t* index1=new Int_t[maxPoints]; + Int_t* index2=new Int_t[maxPoints]; + Double_t xbeam=fVert3D.GetXv(); + Double_t ybeam=fVert3D.GetYv(); + + Int_t iPoint=0; + for(Int_t ilin1=0; ilin1GetDCA(l2); + if(dca > fDCAcut || dca<0.00001) continue; + Double_t point[3]; + Int_t retc = l1->Cross(l2,point); + if(retc<0)continue; + Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); + if(rad>fCoarseMaxRCut)continue; + Double_t distFromBeam=TMath::Sqrt((point[0]-xbeam)*(point[0]-xbeam)+(point[1]-ybeam)*(point[1]-ybeam)); + if(distFromBeam>fMaxRCut2) continue; + xP[iPoint]=point[0]; + yP[iPoint]=point[1]; + zP[iPoint]=point[2]; + index1[iPoint]=ilin1; + index2[iPoint]=ilin2; + iPoint++; + } + } + Int_t npoints=iPoint++; + Int_t index=0; + Short_t* mask=new Short_t[npoints]; + for(Int_t ip=0;ip0) cap=isIndUsed[sortedIndex[ind1-1]]; + UInt_t bigger=0; + Int_t biggerindex=-1; + for(Int_t ind2=0;ind2bigger && isIndUsed[ind2]<=cap){ + bigger=isIndUsed[ind2]; + biggerindex=ind2; + } + } + sortedIndex[ind1]=biggerindex; + } + AliDebug(3,Form("Number of clusters before merging = %d\n",nClusters)); + + // Assign lines to clusters/vertices and merge clusters which share 1 line + Int_t nClustersAfterMerge=nClusters; + Int_t* belongsTo=new Int_t[nLines]; + for(Int_t ilin=0; ilin1 associated tracklet) + UInt_t nGoodVert=0; + for(Int_t iclu=0;iclu1) nGoodVert++; + } + + AliDebug(1,Form("Number of good vertices = %d\n",nGoodVert)); + // Calculate vertex coordinates for each cluster + if(nGoodVert>0){ + fVertArray = new AliESDVertex[nGoodVert]; + Int_t iVert=0; + for(Int_t iclu=0;iclu1){ + AliStrLine **arrlin = new AliStrLine*[size]; + Int_t nFilled=0; + for(Int_t ilin=0; ilin(fLines[ilin]); + } + } + AliDebug(3,Form("Vertex %d N associated tracklets = %d out of %d\n",iVert,size,nFilled)); + + fVertArray[iVert]=AliVertexerTracks::TrackletVertexFinder(arrlin,nFilled); + Double_t peak[3]; + fVertArray[iVert].GetXYZ(peak); + AliStrLine **arrlin2 = new AliStrLine*[size]; + Int_t nFilled2=0; + for(Int_t i=0; iGetDistFromPoint(peak)< fDCAcut) + arrlin2[nFilled2++] = dynamic_cast(l1); + } + if(nFilled2>1){ + AliDebug(3,Form("Vertex %d recalculated with %d tracklets\n",iVert,nFilled2)); + fVertArray[iVert]=AliVertexerTracks::TrackletVertexFinder(arrlin2,nFilled2); + } + delete [] arrlin; + delete [] arrlin2; + ++iVert; + } + } + + if(nGoodVert > 1){ + fIsPileup = kTRUE; + fNTrpuv = fVertArray[1].GetNContributors(); + fZpuv = fVertArray[1].GetZv(); + } + + Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv()); + if(vRadius0){ + Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()}; + Double_t covmatrix[6]; + fVertArray[0].GetCovMatrix(covmatrix); + Double_t chi2=99999.; + Int_t nContr=fVertArray[0].GetNContributors(); + fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); + fCurrentVertex->SetTitle("vertexer: 3D"); + fCurrentVertex->SetName("SPDVertex3D"); + fCurrentVertex->SetDispersion(fVertArray[0].GetDispersion()); + } + } + + delete [] index1; + delete [] index2; + delete [] mask; + delete [] isIndUsed; + delete [] sortedIndex; + delete [] belongsTo; + delete [] cluSize; + delete [] xP; + delete [] yP; + delete [] zP; +} +//______________________________________________________________________ +void AliITSVertexer3D::FindVertex3DIterativeMM(){ + // Defines the AliESDVertex for the current event + Int_t numsor=fLines.GetEntriesFast()*(fLines.GetEntriesFast()-1)/2; + //cout<<"AliITSVertexer3D::FindVertexForCurentEvent: Number of tracklets selected for vertexing "<0){ + fVertArray = new AliESDVertex[fNoVertices]; + for(Int_t kk=0; kk0 & jj%8==0)cout<0 & jj%8==0)cout<(fLines[labels[jj]]); + } + // cout<0){ + Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()}; + Double_t covmatrix[6]; + fVertArray[0].GetCovMatrix(covmatrix); + Double_t chi2=99999.; + Int_t nContr=fVertArray[0].GetNContributors(); + fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); + fCurrentVertex->SetTitle("vertexer: 3D"); + fCurrentVertex->SetName("SPDVertex3D"); + fCurrentVertex->SetDispersion(fVertArray[0].GetDispersion()); + } + } + +} + +//______________________________________________________________________ +Bool_t AliITSVertexer3D::DistBetweenVertices(AliESDVertex &a, AliESDVertex &b, Double_t test, Double_t &dist){ + // method to compare the distance between vertices a and b with "test" + //it returns kTRUE is the distance is less or equal to test + dist = (a.GetX()-b.GetX()) * (a.GetX()-b.GetX()); + dist += (a.GetY()-b.GetY()) * (a.GetY()-b.GetY()); + dist += (a.GetZ()-b.GetZ()) * (a.GetZ()-b.GetZ()); + dist = TMath::Sqrt(dist); + if(dist <= test)return kTRUE; + return kFALSE; +} + + //______________________________________________________________________ Int_t AliITSVertexer3D::FindTracklets(TTree *itsClusterTree, Int_t optCuts){ // All the possible combinations between recpoints on layer 1and 2 are // considered. Straight lines (=tracklets)are formed. // The tracklets are processed in Prepare3DVertex - AliITSDetTypeRec detTypeRec; - TTree *tR = itsClusterTree; - detTypeRec.SetTreeAddressR(tR); TClonesArray *itsRec = 0; - // lc1 and gc1 are local and global coordinates for layer 1 - // Float_t lc1[3]={0.,0.,0.}; - Float_t gc1[3]={0.,0.,0.}; - // lc2 and gc2 are local and global coordinates for layer 2 - // Float_t lc2[3]={0.,0.,0.}; - Float_t gc2[3]={0.,0.,0.}; - - itsRec = detTypeRec.RecPoints(); - TBranch *branch; - branch = tR->GetBranch("ITSRecPoints"); + if(optCuts==0) fZHisto->Reset(); + // gc1 are local and global coordinates for layer 1 + Float_t gc1f[3]={0.,0.,0.}; + Double_t gc1[3]={0.,0.,0.}; + // gc2 are local and global coordinates for layer 2 + Float_t gc2f[3]={0.,0.,0.}; + Double_t gc2[3]={0.,0.,0.}; + AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); + rpcont->FetchClusters(0,itsClusterTree); + if(!rpcont->IsSPDActive()){ + AliWarning("No SPD rec points found, 3D vertex not calculated"); + return -1; + } // Set values for cuts - Float_t xbeam=GetNominalPos()[0]; - Float_t ybeam=GetNominalPos()[1]; - Float_t zvert=0.; - Float_t deltaPhi=fCoarseDiffPhiCut; - Float_t deltaR=fCoarseMaxRCut; - Float_t dZmax=fZCutDiamond; - if(optCuts){ + Double_t xbeam=GetNominalPos()[0]; + Double_t ybeam=GetNominalPos()[1]; + Double_t zvert=0.; + Double_t deltaPhi=fCoarseDiffPhiCut; + Double_t deltaR=fCoarseMaxRCut; + Double_t dZmax=fZCutDiamond; + if(optCuts==1){ xbeam=fVert3D.GetXv(); ybeam=fVert3D.GetYv(); zvert=fVert3D.GetZv(); deltaPhi = fDiffPhiMax; deltaR=fMaxRCut; dZmax=fMaxZCut; + if(fPileupAlgo == 2){ + dZmax=fZCutDiamond; + deltaR=fMaxRCut2; + } + } else if(optCuts==2){ + xbeam=fVert3D.GetXv(); + ybeam=fVert3D.GetYv(); + deltaPhi = fDiffPhiforPileup; + deltaR=fMaxRCut; } - Int_t nrpL1 = 0; // number of rec points on layer 1 - Int_t nrpL2 = 0; // number of rec points on layer 2 - // By default irstL1=0 and lastL1=79 - Int_t firstL1 = AliITSgeomTGeo::GetModuleIndex(1,1,1); - Int_t lastL1 = AliITSgeomTGeo::GetModuleIndex(2,1,1)-1; - for(Int_t module= firstL1; module<=lastL1;module++){ // count number of recopints on layer 1 - branch->GetEvent(module); - nrpL1+= itsRec->GetEntries(); - detTypeRec.ResetRecPoints(); - } - //By default firstL2=80 and lastL2=239 - Int_t firstL2 = AliITSgeomTGeo::GetModuleIndex(2,1,1); - Int_t lastL2 = AliITSgeomTGeo::GetModuleIndex(3,1,1)-1; - for(Int_t module= firstL2; module<=lastL2;module++){ // count number of recopints on layer 2 - branch->GetEvent(module); - nrpL2+= itsRec->GetEntries(); - detTypeRec.ResetRecPoints(); - } - if(nrpL1 == 0 || nrpL2 == 0){ + fNRecPLay1=rpcont->GetNClustersInLayerFast(1); + fNRecPLay2=rpcont->GetNClustersInLayerFast(2); + if(fNRecPLay1 == 0 || fNRecPLay2 == 0){ + AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",fNRecPLay1,fNRecPLay2)); return -1; } - AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",nrpL1,nrpL2)); + AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",fNRecPLay1,fNRecPLay2)); + fDoDownScale=kFALSE; + fSwitchAlgorithm=kFALSE; + + Float_t factDownScal=1.; + Int_t origLaddersOnLayer2=fLadOnLay2; + + switch(fHighMultAlgo){ + case 0: + if(fNRecPLay1>fMaxNumOfClForDownScale || fNRecPLay2>fMaxNumOfClForDownScale){ + if(optCuts==2) return -1; // do not try to search for pileup + SetLaddersOnLayer2(2); + fDoDownScale=kTRUE; + factDownScal=(Float_t)fMaxNumOfClForDownScale*(Float_t)fMaxNumOfClForDownScale/(Float_t)fNRecPLay1/(Float_t)fNRecPLay2; + if(optCuts==1){ + factDownScal*=(fCoarseDiffPhiCut/fDiffPhiMax)*10; + if(factDownScal>1.){ + fDoDownScale=kFALSE; + SetLaddersOnLayer2(origLaddersOnLayer2); + } + } + if(fDoDownScale)AliDebug(1,Form("Too many recpoints on SPD(%d %d ), downscale by %f",fNRecPLay1,fNRecPLay2,factDownScal)); + } + break; + case 1: + if(fNRecPLay1>fMaxNumOfCl || fNRecPLay2>fMaxNumOfCl) { + if(optCuts==2) return -1; // do not try to search for pileup + fSwitchAlgorithm=kTRUE; + } + break; + default: break; // no pileup algo + } + + if(!fDoDownScale && !fSwitchAlgorithm){ + if(fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin){ + SetLaddersOnLayer2(2); + } + } Double_t a[3]={xbeam,ybeam,0.}; Double_t b[3]={xbeam,ybeam,10.}; AliStrLine zeta(a,b,kTRUE); - Float_t bField=AliTracker::GetBz()/10.; //T + static Double_t bField=TMath::Abs(AliTracker::GetBz()/10.); //T SetMeanPPtSelTracks(bField); Int_t nolines = 0; // Loop on modules of layer 1 + Int_t firstL1 = TMath::Max(0,AliITSgeomTGeo::GetModuleIndex(1,1,1)); + Int_t lastL1 = AliITSgeomTGeo::GetModuleIndex(2,1,1)-1; for(Int_t modul1= firstL1; modul1<=lastL1;modul1++){ // Loop on modules of layer 1 if(!fUseModule[modul1]) continue; - UShort_t ladder=int(modul1/4)+1; // ladders are numbered starting from 1 - branch->GetEvent(modul1); - Int_t nrecp1 = itsRec->GetEntries(); - static TClonesArray prpl1("AliITSRecPoint",nrecp1); - prpl1.SetOwner(); + + UShort_t ladder=modul1/4+1; // ladders are numbered starting from 1 + TClonesArray *prpl1=rpcont->UncheckedGetClusters(modul1); + Int_t nrecp1 = prpl1->GetEntries(); for(Int_t j=0;jAt(j); - new(prpl1[j])AliITSRecPoint(*recp); - } - detTypeRec.ResetRecPoints(); - for(Int_t j=0;jGetDetLocalX(); - lc[2]=recp1->GetDetLocalZ(); - */ - recp1->GetGlobalXYZ(gc1); + if(j>kMaxCluPerMod) continue; + UShort_t idClu1=modul1*kMaxCluPerMod+j; + if(fUsedCluster.TestBitNumber(idClu1)) continue; + if(fDoDownScale && !fSwitchAlgorithm){ + if(fGenerForDownScale->Rndm()>factDownScal) continue; + } + AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1->At(j); + recp1->GetGlobalXYZ(gc1f); + for(Int_t ico=0;ico<3;ico++)gc1[ico]=gc1f[ico]; + Double_t phi1 = TMath::ATan2(gc1[1]-ybeam,gc1[0]-xbeam); if(phi1<0)phi1=2*TMath::Pi()+phi1; for(Int_t ladl2=0 ; ladl2AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2); Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1); + if(modul2<0)continue; if(!fUseModule[modul2]) continue; - branch->GetEvent(modul2); + itsRec=rpcont->UncheckedGetClusters(modul2); Int_t nrecp2 = itsRec->GetEntries(); for(Int_t j2=0;j2kMaxCluPerMod) continue; + UShort_t idClu2=modul2*kMaxCluPerMod+j2; + if(fUsedCluster.TestBitNumber(idClu2)) continue; + AliITSRecPoint *recp2 = (AliITSRecPoint*)itsRec->At(j2); - /* - lc2[0]=recp2->GetDetLocalX(); - lc2[2]=recp2->GetDetLocalZ(); - */ - recp2->GetGlobalXYZ(gc2); + recp2->GetGlobalXYZ(gc2f); + for(Int_t ico=0;ico<3;ico++)gc2[ico]=gc2f[ico]; Double_t phi2 = TMath::ATan2(gc2[1]-ybeam,gc2[0]-xbeam); if(phi2<0)phi2=2*TMath::Pi()+phi2; Double_t diff = TMath::Abs(phi2-phi1); if(diff>TMath::Pi())diff=2.*TMath::Pi()-diff; + if(optCuts==0 && diffFill(zr0); + } if(diff>deltaPhi)continue; AliStrLine line(gc1,gc2,kTRUE); Double_t cp[3]; @@ -260,69 +689,59 @@ Int_t AliITSVertexer3D::FindTracklets(TTree *itsClusterTree, Int_t optCuts){ Double_t deltaZ=cp[2]-zvert; if(TMath::Abs(deltaZ)>dZmax)continue; + if(nolines == 0){ if(fLines.GetEntriesFast()>0)fLines.Clear("C"); } Float_t cov[6]; recp2->GetGlobalCov(cov); - - Float_t rad1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]); - Float_t rad2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]); - Float_t factor=(rad1+rad2)/(rad2-rad1); //factor to account for error on tracklet direction - Float_t curvErr=0; + Double_t rad1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]); + Double_t rad2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]); + Double_t factor=(rad1+rad2)/(rad2-rad1); //factor to account for error on tracklet direction + + Double_t curvErr=0; if(bField>0.00001){ - Float_t curvRadius=fMeanPtSelTrk/(0.3*bField)*100; //cm - Float_t dRad=TMath::Sqrt(TMath::Power((gc1[0]-gc2[0]),2)+TMath::Power((gc1[1]-gc2[1]),2)); - Float_t aux=dRad/2.+rad1; + Double_t curvRadius=fMeanPtSelTrk/(0.3*bField)*100; //cm + Double_t dRad=TMath::Sqrt((gc1[0]-gc2[0])*(gc1[0]-gc2[0])+(gc1[1]-gc2[1])*(gc1[1]-gc2[1])); + Double_t aux=dRad/2.+rad1; curvErr=TMath::Sqrt(curvRadius*curvRadius-dRad*dRad/4.)-TMath::Sqrt(curvRadius*curvRadius-aux*aux); //cm } - - Float_t sigmasq[3]; + Double_t sigmasq[3]; sigmasq[0]=(cov[0]+curvErr*curvErr/2.)*factor*factor; sigmasq[1]=(cov[3]+curvErr*curvErr/2.)*factor*factor; sigmasq[2]=cov[5]*factor*factor; // Multiple scattering - Float_t beta=1.; - Float_t beta2=beta*beta; - Float_t p2=fMeanPSelTrk*fMeanPSelTrk; - Float_t rBP=GetPipeRadius(); - Float_t dBP=0.08/35.3; // 800 um of Be - Float_t dL1=0.01; //approx. 1% of radiation length - Float_t theta2BP=14.1*14.1/(beta2*p2*1e6)*TMath::Abs(dBP); - Float_t theta2L1=14.1*14.1/(beta2*p2*1e6)*TMath::Abs(dL1); - Float_t thetaBP=TMath::Sqrt(theta2BP); - Float_t thetaL1=TMath::Sqrt(theta2L1); -// Float_t geomfac[3]; -// geomfac[0]=sin(phi1)*sin(phi1); -// geomfac[1]=cos(phi1)*cos(phi1); -// Float_t tgth=(gc2[2]-gc1[2])/(rad2-rad1); -// geomfac[2]=1+tgth*tgth; + Double_t pOverMass=fMeanPSelTrk/0.140; + Double_t beta2=pOverMass*pOverMass/(1+pOverMass*pOverMass); + Double_t p2=fMeanPSelTrk*fMeanPSelTrk; + Double_t rBP=GetPipeRadius(); + Double_t dBP=0.08/35.3; // 800 um of Be + Double_t dL1=0.01; //approx. 1% of radiation length + Double_t theta2BP=14.1*14.1/(beta2*p2*1e6)*dBP; + Double_t theta2L1=14.1*14.1/(beta2*p2*1e6)*dL1; + Double_t rtantheta1=(rad2-rad1)*TMath::Tan(TMath::Sqrt(theta2L1)); + Double_t rtanthetaBP=(rad1-rBP)*TMath::Tan(TMath::Sqrt(theta2BP)); for(Int_t ico=0; ico<3;ico++){ -// printf("Error on coord. %d due to cov matrix+curvErr=%f\n",ico,sigmasq[ico]); -// // sigmasq[ico]+=rad1*rad1*geomfac[ico]*theta2L1/2; // multiple scattering in layer 1 -// // sigmasq[ico]+=rBP*rBP*geomfac[ico]*theta2BP/2; // multiple scattering in beam pipe - sigmasq[ico]+=TMath::Power(rad1*TMath::Tan(thetaL1),2)/3.; - sigmasq[ico]+=TMath::Power(rBP*TMath::Tan(thetaBP),2)/3.; - -// printf("Multipl. scatt. contr %d = %f (LAY1), %f (BP)\n",ico,rad1*rad1*geomfac[ico]*theta2L1/2,rBP*rBP*geomfac[ico]*theta2BP/2); -// printf("Total error on coord %d = %f\n",ico,sigmasq[ico]); + sigmasq[ico]+=rtantheta1*rtantheta1*factor*factor/3.; + sigmasq[ico]+=rtanthetaBP*rtanthetaBP*factor*factor/3.; } - Float_t wmat[9]={1.,0.,0.,0.,1.,0.,0.,0.,1.}; + Double_t wmat[9]={1.,0.,0.,0.,1.,0.,0.,0.,1.}; if(sigmasq[0]!=0.) wmat[0]=1./sigmasq[0]; if(sigmasq[1]!=0.) wmat[4]=1./sigmasq[1]; if(sigmasq[2]!=0.) wmat[8]=1./sigmasq[2]; - new(fLines[nolines++])AliStrLine(gc1,sigmasq,wmat,gc2,kTRUE); + new(fLines[nolines++])AliStrLine(gc1,sigmasq,wmat,gc2,kTRUE,idClu1,idClu2); } - detTypeRec.ResetRecPoints(); } } } - prpl1.Clear(); } + + SetLaddersOnLayer2(origLaddersOnLayer2); + if(nolines == 0)return -2; return nolines; } @@ -331,47 +750,68 @@ Int_t AliITSVertexer3D::FindTracklets(TTree *itsClusterTree, Int_t optCuts){ Int_t AliITSVertexer3D::Prepare3DVertex(Int_t optCuts){ // Finds the 3D vertex information using tracklets Int_t retcode = -1; - - Float_t xbeam=GetNominalPos()[0]; - Float_t ybeam=GetNominalPos()[1]; - Float_t zvert=0.; - Float_t deltaR=fCoarseMaxRCut; - Float_t dZmax=fZCutDiamond; - if(optCuts){ + Double_t xbeam=GetNominalPos()[0]; + Double_t ybeam=GetNominalPos()[1]; + Double_t zvert=0.; + Double_t deltaR=fCoarseMaxRCut; + Double_t dZmax=fZCutDiamond; + if(optCuts==1){ xbeam=fVert3D.GetXv(); ybeam=fVert3D.GetYv(); zvert=fVert3D.GetZv(); deltaR=fMaxRCut; dZmax=fMaxZCut; + if(fPileupAlgo == 2){ + dZmax=fZCutDiamond; + deltaR=fMaxRCut2; + } + }else if(optCuts==2){ + xbeam=fVert3D.GetXv(); + ybeam=fVert3D.GetYv(); + deltaR=fMaxRCut; + } + + Double_t origBinSizeR=fBinSizeR; + Double_t origBinSizeZ=fBinSizeZ; + Bool_t rebinned=kFALSE; + if(fDoDownScale){ + SetBinSizeR(0.05); + SetBinSizeZ(0.05); + rebinned=kTRUE; + }else{ + if(optCuts==0 && (fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin)){ + SetBinSizeR(0.1); + SetBinSizeZ(0.2); + rebinned=kTRUE; + } } + Double_t rl=-fCoarseMaxRCut; + Double_t rh=fCoarseMaxRCut; + Double_t zl=-fZCutDiamond; + Double_t zh=fZCutDiamond; + Int_t nbr=(Int_t)((rh-rl)/fBinSizeR+0.0001); + Int_t nbz=(Int_t)((zh-zl)/fBinSizeZ+0.0001); + Int_t nbrcs=(Int_t)((rh-rl)/(fBinSizeR*2.)+0.0001); + Int_t nbzcs=(Int_t)((zh-zl)/(fBinSizeZ*2.)+0.0001); - Int_t nbr=50; - Float_t rl=-fCoarseMaxRCut; - Float_t rh=fCoarseMaxRCut; - Int_t nbz=100; - Float_t zl=-fZCutDiamond; - Float_t zh=fZCutDiamond; - Float_t binsizer=(rh-rl)/nbr; - Float_t binsizez=(zh-zl)/nbz; TH3F *h3d = new TH3F("h3d","xyz distribution",nbr,rl,rh,nbr,rl,rh,nbz,zl,zh); - Int_t nbrcs=25; - Int_t nbzcs=50; TH3F *h3dcs = new TH3F("h3dcs","xyz distribution",nbrcs,rl,rh,nbrcs,rl,rh,nbzcs,zl,zh); // cleanup of the TCLonesArray of tracklets (i.e. fakes are removed) - Int_t *validate = new Int_t [fLines.GetEntriesFast()]; - for(Int_t i=0; iGetDCA(l2); + Double_t dca=l1->GetDCA(l2); if(dca > fDCAcut || dca<0.00001) continue; Double_t point[3]; Int_t retc = l1->Cross(l2,point); if(retc<0)continue; Double_t deltaZ=point[2]-zvert; - if(TMath::Abs(deltaZ)>dZmax)continue; + if(TMath::Abs(deltaZ)>dZmax)continue; Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); if(rad>fCoarseMaxRCut)continue; Double_t deltaX=point[0]-xbeam; @@ -385,11 +825,16 @@ Int_t AliITSVertexer3D::Prepare3DVertex(Int_t optCuts){ } } - - Int_t numbtracklets=0; - for(Int_t i=0; i=1)numbtracklets++; - if(numbtracklets<2){delete [] validate; delete h3d; return retcode; } + for(Int_t i=0; i=1)numbtracklets++; + if(numbtracklets<2){ + delete [] validate; + delete h3d; + delete h3dcs; + SetBinSizeR(origBinSizeR); + SetBinSizeZ(origBinSizeZ); + return retcode; + } for(Int_t i=0; i1)){ ntrkl=0; ntimes=0; FindPeaks(h3dcs,peak,ntrkl,ntimes); binsizer=(rh-rl)/nbrcs; binsizez=(zh-zl)/nbzcs; - if(ntrkl==1 || ntimes>1){delete h3dcs; return retcode;} + if(ntrkl==1 || ntimes>1){ + delete h3dcs; + SetBinSizeR(origBinSizeR); + SetBinSizeZ(origBinSizeZ); + return retcode; + } } delete h3dcs; - // Second selection loop - - Float_t bs=(binsizer+binsizez)/2.; + Double_t bs=(binsizer+binsizez)/2.; for(Int_t i=0; iGetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i); @@ -425,42 +883,210 @@ Int_t AliITSVertexer3D::Prepare3DVertex(Int_t optCuts){ fLines.Compress(); AliDebug(1,Form("Number of tracklets (after 2nd compression) %d",fLines.GetEntriesFast())); + // Finer Histo in limited range in case of high mult. + if(rebinned){ + SetBinSizeR(0.01); + SetBinSizeZ(0.01); + Double_t xl=peak[0]-0.3; + Double_t xh=peak[0]+0.3; + Double_t yl=peak[1]-0.3; + Double_t yh=peak[1]+0.3; + zl=peak[2]-0.5; + zh=peak[2]+0.5; + Int_t nbxfs=(Int_t)((xh-xl)/fBinSizeR+0.0001); + Int_t nbyfs=(Int_t)((yh-yl)/fBinSizeR+0.0001); + Int_t nbzfs=(Int_t)((zh-zl)/fBinSizeZ+0.0001); + + TH3F *h3dfs = new TH3F("h3dfs","xyz distribution",nbxfs,xl,xh,nbyfs,yl,yh,nbzfs,zl,zh); + for(Int_t i=0; iGetDCA(l2); + if(dca > fDCAcut || dca<0.00001) continue; + Double_t point[3]; + Int_t retc = l1->Cross(l2,point); + if(retc<0)continue; + Double_t deltaZ=point[2]-zvert; + if(TMath::Abs(deltaZ)>dZmax)continue; + Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); + if(rad>fCoarseMaxRCut)continue; + Double_t deltaX=point[0]-xbeam; + Double_t deltaY=point[1]-ybeam; + Double_t raddist=TMath::Sqrt(deltaX*deltaX+deltaY*deltaY); + if(raddist>deltaR)continue; + h3dfs->Fill(point[0],point[1],point[2]); + } + } + ntrkl=0; + ntimes=0; + + Double_t newpeak[3]={0.,0.,0.}; + FindPeaks(h3dfs,newpeak,ntrkl,ntimes); + if(ntimes==1){ + for(Int_t iCoo=0; iCoo<3; iCoo++) peak[iCoo]=newpeak[iCoo]; + binsizer=fBinSizeR; + binsizez=fBinSizeZ; + } + delete h3dfs; + bs=(binsizer+binsizez)/2.; + for(Int_t i=0; iGetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i); + } + fLines.Compress(); + AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast())); + } + SetBinSizeR(origBinSizeR); + SetBinSizeZ(origBinSizeZ); + + + // Second selection loop + + if(fLines.GetEntriesFast()>1){ + retcode=0; // find a first candidate for the primary vertex fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); // make a further selection on tracklets based on this first candidate fVert3D.GetXYZ(peak); AliDebug(1,Form("FIRST V candidate: %f ; %f ; %f",peak[0],peak[1],peak[2])); + Int_t *validate2 = new Int_t [fLines.GetEntriesFast()]; + for(Int_t i=0; iGetDistFromPoint(peak)> fDCAcut)fLines.RemoveAt(i); + if(optCuts==2){ // temporarily only for pileup + for(Int_t j=i+1; jGetDCA(l2)<0.00001){ + Int_t delta1=(Int_t)l1->GetIdPoint(0)-(Int_t)l2->GetIdPoint(0); + Int_t delta2=(Int_t)l1->GetIdPoint(1)-(Int_t)l2->GetIdPoint(1); + Int_t deltamod1=(Int_t)l1->GetIdPoint(0)/kMaxCluPerMod + -(Int_t)l2->GetIdPoint(0)/kMaxCluPerMod; + Int_t deltamod2=(Int_t)l1->GetIdPoint(1)/kMaxCluPerMod + -(Int_t)l2->GetIdPoint(1)/kMaxCluPerMod; + // remove tracklets sharing a point + if( (delta1==0 && deltamod2==0) || + (delta2==0 && deltamod1==0) ) validate2[j]=0; + } + } + } + } + for(Int_t i=0; i1) retcode=0; // this new tracklet selection is used - else retcode =1; // the previous tracklet selection will be used - } - else { - retcode = 0; + if(fLines.GetEntriesFast()>1){// this new tracklet selection is used + fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); + } } return retcode; } //________________________________________________________ -void AliITSVertexer3D::SetMeanPPtSelTracks(Float_t fieldTesla){ - // Sets mean values of P and Pt based on the field +Int_t AliITSVertexer3D::Prepare3DVertexPbPb(){ + // Finds the 3D vertex information in Pb-Pb events using tracklets + AliDebug(1,"High multiplicity event.\n"); + + Int_t nxy=(Int_t)(2.*fCoarseMaxRCut/f3DBinSize); + Double_t xymi= -nxy*f3DBinSize/2.; + Double_t xyma= nxy*f3DBinSize/2.; + Int_t nz=(Int_t)(2.*fZCutDiamond/f3DBinSize); + Double_t zmi=-nz*f3DBinSize/2.; + Double_t zma=nz*f3DBinSize/2.; + Int_t nolines=fLines.GetEntriesFast(); + TH3F *h3dv = new TH3F("h3dv","3d tracklets",nxy,xymi,xyma,nxy,xymi,xyma,nz,zmi,zma); + + for(Int_t itra=0; itra1.e-6){ + AliStrLine *str=(AliStrLine*)fLines.At(itra); + Double_t t1,t2; + if(str->GetParamAtRadius(fCoarseMaxRCut,t1,t2)){ + do{ + Double_t punt[3]; + str->ComputePointAtT(t1,punt); + h3dv->Fill(punt[0],punt[1],punt[2],wei); + t1+=f3DBinSize/3.; + } while(t1GetDistFromPoint(f3DPeak); + if(dist>(2.*f3DBinSize)) fLines.RemoveAt(nolines); + } + fLines.Compress(); + nolines=fLines.GetEntriesFast(); + + delete h3dv; + + Int_t *validate2 = new Int_t [fLines.GetEntriesFast()]; + for(Int_t i=0; iGetDistFromPoint(f3DPeak)> fDCAcut)fLines.RemoveAt(i); + for(Int_t j=i+1; jGetDCA(l2)<0.00001){ + Int_t delta1=(Int_t)l1->GetIdPoint(0)-(Int_t)l2->GetIdPoint(0); + Int_t delta2=(Int_t)l1->GetIdPoint(1)-(Int_t)l2->GetIdPoint(1); + Int_t deltamod1=(Int_t)l1->GetIdPoint(0)/kMaxCluPerMod + -(Int_t)l2->GetIdPoint(0)/kMaxCluPerMod; + Int_t deltamod2=(Int_t)l1->GetIdPoint(1)/kMaxCluPerMod + -(Int_t)l2->GetIdPoint(1)/kMaxCluPerMod; + // remove tracklets sharing a point + if( (delta1==0 && deltamod2==0) || + (delta2==0 && deltamod1==0) ) validate2[j]=0; + + } + } + } + for(Int_t i=0; iGetFirst();i<=xax->GetLast();i++){ - Float_t xval = xax->GetBinCenter(i); + Double_t xval = xax->GetBinCenter(i); for(Int_t j=yax->GetFirst();j<=yax->GetLast();j++){ - Float_t yval = yax->GetBinCenter(j); + Double_t yval = yax->GetBinCenter(j); for(Int_t k=zax->GetFirst();k<=zax->GetLast();k++){ - Float_t zval = zax->GetBinCenter(k); + Double_t zval = zax->GetBinCenter(k); Int_t bc =(Int_t)histo->GetBinContent(i,j,k); + if(bc==0) continue; if(bc>nOfTracklets){ - nOfTracklets = bc; + nOfTracklets=bc; peak[2] = zval; peak[1] = yval; peak[0] = xval; + peakbin[2] = k; + peakbin[1] = j; + peakbin[0] = i; + peak2bin[2] = -1; + peak2bin[1] = -1; + peak2bin[0] = -1; + bc2=-1; nOfTimes = 1; + }else if(bc==nOfTracklets){ + if(TMath::Abs(i-peakbin[0])<=1 && TMath::Abs(j-peakbin[1])<=1 && TMath::Abs(k-peakbin[2])<=1){ + peak2bin[2] = k; + peak2bin[1] = j; + peak2bin[0] = i; + bc2=bc; + nOfTimes = 1; + }else{ + nOfTimes++; + } } - if(bc==nOfTracklets){ - nOfTimes++; + } + } + } + if(peak2bin[0]>=-1 && bc2!=-1){ // two contiguous peak-cells with same contents + peak[0]=0.5*(xax->GetBinCenter(peakbin[0])+xax->GetBinCenter(peak2bin[0])); + peak[1]=0.5*(yax->GetBinCenter(peakbin[1])+yax->GetBinCenter(peak2bin[1])); + peak[2]=0.5*(zax->GetBinCenter(peakbin[2])+zax->GetBinCenter(peak2bin[2])); + nOfTracklets+=bc2; + nOfTimes=1; + } +} +//________________________________________________________ +void AliITSVertexer3D::MarkUsedClusters(){ + // Mark clusters of tracklets used in vertex claulation + for(Int_t i=0; iGetIdPoint(0); + Int_t idClu2=lin->GetIdPoint(1); + fUsedCluster.SetBitNumber(idClu1); + fUsedCluster.SetBitNumber(idClu2); + } +} +//________________________________________________________ +Int_t AliITSVertexer3D::RemoveTracklets(){ + // Remove trackelts close to first found vertex + Double_t vert[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()}; + Int_t nRemoved=0; + for(Int_t i=0; iGetDistFromPoint(vert)GetIdPoint(0); + Int_t idClu2=lin->GetIdPoint(1); + fUsedCluster.SetBitNumber(idClu1); + fUsedCluster.SetBitNumber(idClu2); + fLines.RemoveAt(i); + ++nRemoved; + } + } + fLines.Compress(); + return nRemoved; +} +//________________________________________________________ +void AliITSVertexer3D::FindOther3DVertices(TTree *itsClusterTree){ + // pileup identification based on 3D vertexing with not used clusters + + fVertArray = new AliESDVertex[kMaxPileupVertices+1]; + fVertArray[0]=(*fCurrentVertex); + Int_t nFoundVert=1; + for(Int_t iPilV=1; iPilV<=kMaxPileupVertices; iPilV++){ + MarkUsedClusters(); + fLines.Clear("C"); + Int_t nolines = FindTracklets(itsClusterTree,2); + if(nolines>=2){ + Int_t nr=RemoveTracklets(); + nolines-=nr; + if(nolines>=2){ + Int_t rc=Prepare3DVertex(2); + if(rc==0){ + fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); + if(fVert3D.GetNContributors()>=fMinTrackletsForPilup){ + fIsPileup=kTRUE; + fVertArray[nFoundVert]=fVert3D; + nFoundVert++; + if(nFoundVert==2){ + fZpuv=fVert3D.GetZv(); + fNTrpuv=fVert3D.GetNContributors(); + } + } } } } } - + fNoVertices=nFoundVert; +} +//______________________________________________________________________ +void AliITSVertexer3D::PileupFromZ(){ + // Calls the pileup algorithm of ALiITSVertexerZ + Int_t binmin, binmax; + Int_t nPeaks=AliITSVertexerZ::GetPeakRegion(fZHisto,binmin,binmax); + if(nPeaks==2)AliWarning("2 peaks found"); + Int_t firstPeakCont=0; + Double_t firstPeakPos=0.; + for(Int_t i=binmin-1;i<=binmax+1;i++){ + firstPeakCont+=static_cast(fZHisto->GetBinContent(i)); + firstPeakPos+=fZHisto->GetBinContent(i)*fZHisto->GetBinCenter(i); + } + if(firstPeakCont>0){ + firstPeakPos/=firstPeakCont; + Int_t ncontr2=0; + if(firstPeakCont>fMinTrackletsForPilup){ + Float_t secPeakPos; + ncontr2=AliITSVertexerZ::FindSecondPeak(fZHisto,binmin,binmax,secPeakPos); + if(ncontr2>=fMinTrackletsForPilup){ + fIsPileup=kTRUE; + fNoVertices=2; + AliESDVertex secondVert(secPeakPos,0.1,ncontr2); + fVertArray = new AliESDVertex[2]; + fVertArray[0]=(*fCurrentVertex); + fVertArray[1]=secondVert; + fZpuv=secPeakPos; + fNTrpuv=ncontr2; + } + } + } +} + +//________________________________________________________ +Double_t AliITSVertexer3D::GetFraction(Int_t itr) const { + // this method is used to fill a 3D histogram representing + // the trajectories of the candidate tracklets + // The computed fraction is used as a weight at filling time + AliStrLine *str = (AliStrLine*)fLines.At(itr); + Double_t spigolo=10.; + Double_t cd[3]; + str->GetCd(cd); + Double_t par=0.; + Double_t maxl=TMath::Sqrt(3.)*spigolo; + // intersection with a plane normal to the X axis + if(TMath::AreEqualAbs(cd[0],0.,1.e-9)){ + par=1000000.; + } + else { + par=spigolo/cd[0]; + } + Double_t zc=cd[2]*par; + Double_t yc=cd[1]*par; + if((-spigolo<=yc && yc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl); + // intersection with a plane normal to the Y axis + if(TMath::AreEqualAbs(cd[1],0.,1.e-9)){ + par=1000000.; + } + else { + par=spigolo/cd[1]; + } + zc=cd[2]*par; + Double_t xc=cd[0]*par; + if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl); + // intersection with a plane normal to the Z axis + if(TMath::AreEqualAbs(cd[2],0.,1.e-9)){ + par=1000000.; + } + else { + par=spigolo/cd[2]; + } + yc=cd[1]*par; + xc=cd[0]*par; + if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=yc && yc<=spigolo))return TMath::Abs(par/maxl); + // control should never reach the following lines + AliError(Form("anomalous tracklet direction for tracklet %d in fLines\n",itr)); + str->PrintStatus(); + return 0.; } //________________________________________________________ void AliITSVertexer3D::PrintStatus() const { // Print current status - printf("=======================================================\n"); - printf("Loose cut on Delta Phi %f\n",fCoarseDiffPhiCut); - printf("Cut on tracklet DCA to Z axis %f\n",fCoarseMaxRCut); - printf("Cut on tracklet DCA to beam axis %f\n",fMaxRCut); + printf("========= First step selections =====================\n"); printf("Cut on diamond (Z) %f\n",fZCutDiamond); + printf("Loose cut on Delta Phi %f\n",fCoarseDiffPhiCut); + printf("Loose cut on tracklet DCA to Z axis %f\n",fCoarseMaxRCut); printf("Cut on DCA - tracklet to tracklet and to vertex %f\n",fDCAcut); - printf(" Max Phi difference: %f\n",fDiffPhiMax); + printf("========= Second step selections ====================\n"); + printf("Cut on tracklet-to-first-vertex Z distance %f\n",fMaxZCut); + printf("Max Phi difference: %f\n",fDiffPhiMax); + printf("Cut on tracklet DCA to beam axis %f\n",fMaxRCut); + printf("Cut on tracklet DCA to beam axis (algo2) %f\n",fMaxRCut2); + printf("========= Pileup selections =========================\n"); + printf("Pileup algo: %d\n",fPileupAlgo); + printf("Min DCA to 1st vertex for pileup (algo 0 and 1): %f\n",fDCAforPileup); + printf("Cut on distance between pair-vertices (algo 2): %f\n",fCutOnPairs); + printf("Maximum number of clusters on L1 or L2 for downscale: %d\n",fMaxNumOfClForDownScale); + printf("Maximum number of clusters on L1 or L2 for histo rebin: %d\n",fMaxNumOfClForRebin); printf("=======================================================\n"); } +