* provided "as is" without express or implied warranty. *
**************************************************************************/
#include <TTree.h>
+#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 = 500;
+
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.),
-fUsedCluster(kMaxCluPerMod*kNSPDMod),
-fZHisto(0),
-fDCAforPileup(0.),
-fPileupAlgo(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),
+ fDoDownScale(kFALSE),
+ fGenerForDownScale(0)
{
// Default constructor
SetCoarseDiffPhiCut();
+ SetFineDiffPhiCut();
+ SetCutOnPairs();
SetCoarseMaxRCut();
SetMaxRCut();
+ SetMaxRCutAlgo2();
SetZCutDiamond();
SetMaxZCut();
SetDCACut();
SetMeanPSelTracks();
SetMeanPtSelTracks();
SetMinDCAforPileup();
+ SetDeltaPhiforPileup();
SetPileupAlgo();
- Float_t binsize=0.02; // default 200 micron
+ SetBinSizeR();
+ SetBinSizeZ();
+ Double_t binsize=0.02; // default 200 micron
Int_t nbins=static_cast<Int_t>(1+2*fZCutDiamond/binsize);
fZHisto=new TH1F("hz","",nbins,-fZCutDiamond,-fZCutDiamond+binsize*nbins);
+ fGenerForDownScale=new TRandom3(987654321);
}
//______________________________________________________________________
// Destructor
fLines.Clear("C");
if(fZHisto) delete fZHisto;
+ if(fGenerForDownScale) delete fGenerForDownScale;
}
//______________________________________________________________________
void AliITSVertexer3D::ResetVert3D(){
//
+ ResetVertex();
fVert3D.SetXv(0.);
fVert3D.SetYv(0.);
fVert3D.SetZv(0.);
fVert3D.SetDispersion(0.);
fVert3D.SetNContributors(0);
- fIsPileup=kFALSE;
- fNTrpuv=-2;
- fZpuv=-99999.;
fUsedCluster.ResetAllBits(0);
}
//______________________________________________________________________
// 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 */
+ rc=Prepare3DVertex(0);
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);
- }
- }
- /* 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(vRadius<GetPipeRadius() && fVert3D.GetNContributors()>0){
- 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());
-
- switch(fPileupAlgo){
- case 0: PileupFromZ(); break;
- case 1: FindOther3DVertices(itsClusterTree); break;
- default: AliError("Wrong pileup algorithm"); break;
+ if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative();
+ else if(fPileupAlgo<2 && rc == 0) FindVertex3D(itsClusterTree);
+ if(rc!=0) fVert3D.SetNContributors(0); // exclude this vertex
}
}
}
+
if(!fCurrentVertex){
AliITSVertexerZ vertz(GetNominalPos()[0],GetNominalPos()[1]);
vertz.SetDetTypeRec(GetDetTypeRec());
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){
+
+ Double_t vRadius=TMath::Sqrt(fVert3D.GetXv()*fVert3D.GetXv()+fVert3D.GetYv()*fVert3D.GetYv());
+ if(vRadius<GetPipeRadius() && fVert3D.GetNContributors()>0){
+ 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;
+ default: AliError("Wrong pileup algorithm"); break;
+ }
+ if(fNoVertices==1){
+ fVertArray = new AliESDVertex[1];
+ fVertArray[0]=(*fCurrentVertex);
+ }
+ }
+}
+
+//______________________________________________________________________
+void AliITSVertexer3D::FindVertex3DIterative(){
+ //
+
+ 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; ilin1<nLines; ilin1++){
+ AliStrLine *l1 = (AliStrLine*)fLines.At(ilin1);
+ for(Int_t ilin2=ilin1+1; ilin2<nLines; ilin2++){
+ AliStrLine *l2 = (AliStrLine*)fLines.At(ilin2);
+ 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 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;ip<npoints;ip++) mask[ip]=-1;
+
+ for(Int_t ip1=0;ip1<npoints;ip1++){
+ if(mask[ip1]==-1) mask[ip1]=index++;
+ for(Int_t ip2=ip1+1; ip2<npoints; ip2++){
+ if(mask[ip2]==mask[ip1] && mask[ip2]!=-1) continue;
+ Double_t dist2=(xP[ip1]-xP[ip2])*(xP[ip1]-xP[ip2]);
+ dist2+=(yP[ip1]-yP[ip2])*(yP[ip1]-yP[ip2]);
+ dist2+=(zP[ip1]-zP[ip2])*(zP[ip1]-zP[ip2]);
+ if(dist2<fCutOnPairs*fCutOnPairs){
+ if(mask[ip2]==-1) mask[ip2]=mask[ip1];
+ else{
+ for(Int_t ip=0; ip<npoints;ip++){
+ if(mask[ip]==mask[ip2]) mask[ip]=mask[ip1];
+ }
+ }
+ }
+ }
+ }
+
+
+ // Count multiplicity of trackelts in clusters
+ UInt_t* isIndUsed=new UInt_t[index+1];
+ for(Int_t ind=0;ind<index+1;ind++) isIndUsed[ind]=0;
+ for(Int_t ip=0; ip<npoints;ip++){
+ Int_t ind=mask[ip];
+ isIndUsed[ind]++;
+ }
+
+ // Count clusters/vertices and sort according to multiplicity
+ Int_t nClusters=0;
+ Int_t* sortedIndex=new Int_t[index+1];
+ for(Int_t ind1=0;ind1<index+1;ind1++){
+ if(isIndUsed[ind1]<=1) isIndUsed[ind1]=0;
+ else nClusters++;
+ UInt_t cap=9999999;
+ if(ind1>0) cap=isIndUsed[sortedIndex[ind1-1]];
+ UInt_t bigger=0;
+ Int_t biggerindex=-1;
+ for(Int_t ind2=0;ind2<index+1;ind2++){
+ Bool_t use=kTRUE;
+ for(Int_t ind3=0; ind3<ind1; ind3++)
+ if(ind2==sortedIndex[ind3]) use=kFALSE;
+ if(use && isIndUsed[ind2]>bigger && 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; ilin<nLines; ilin++) belongsTo[ilin]=-1;
+ for(Int_t iclu=0;iclu<nClusters;iclu++){
+ Int_t actualCluIndex=iclu;
+ for(Int_t ip=0; ip<npoints;ip++){
+ if(mask[ip]==sortedIndex[iclu]){
+ Int_t ind1=index1[ip];
+ if(belongsTo[ind1]==-1) belongsTo[ind1]=actualCluIndex;
+ else if(belongsTo[ind1]<actualCluIndex){
+ Int_t newCluIndex=belongsTo[ind1];
+ for(Int_t ilin=0; ilin<nLines; ilin++){
+ if(belongsTo[ilin]==actualCluIndex) belongsTo[ilin]=newCluIndex;
+ }
+ AliDebug(10,Form("Merged cluster %d with %d\n",actualCluIndex,newCluIndex));
+ actualCluIndex=newCluIndex;
+ nClustersAfterMerge--;
+ }
+ Int_t ind2=index2[ip];
+ if(belongsTo[ind2]==-1) belongsTo[ind2]=actualCluIndex;
+ else if(belongsTo[ind2]<actualCluIndex){
+ Int_t newCluIndex=belongsTo[ind2];
+ for(Int_t ilin=0; ilin<nLines; ilin++){
+ if(belongsTo[ilin]==actualCluIndex) belongsTo[ilin]=newCluIndex;
+ }
+ AliDebug(10,Form("Merged cluster %d with %d\n",actualCluIndex,newCluIndex));
+ actualCluIndex=newCluIndex;
+ nClustersAfterMerge--;
+ }
+ }
+ }
+ }
+ AliDebug(3,Form("Number of clusters after merging = %d\n",nClustersAfterMerge));
+
+ // Count lines associated to each cluster/vertex
+ UInt_t *cluSize=new UInt_t[nClusters];
+ for(Int_t iclu=0;iclu<nClusters;iclu++){
+ cluSize[iclu]=0;
+ for(Int_t ilin=0; ilin<nLines; ilin++){
+ if(belongsTo[ilin]==iclu) cluSize[iclu]++;
+ }
+ }
+
+ // Count good vertices (>1 associated tracklet)
+ UInt_t nGoodVert=0;
+ for(Int_t iclu=0;iclu<nClusters;iclu++){
+ AliDebug(3,Form("Vertex %d Size=%d\n",iclu,cluSize[iclu]));
+ if(cluSize[iclu]>1) 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;iclu<nClusters;iclu++){
+ Int_t size=cluSize[iclu];
+ if(size>1){
+ AliStrLine **arrlin = new AliStrLine*[size];
+ Int_t nFilled=0;
+ for(Int_t ilin=0; ilin<nLines; ilin++){
+ if(belongsTo[ilin]==iclu){
+ arrlin[nFilled++] = dynamic_cast<AliStrLine*>(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; i<nFilled;i++){
+ AliStrLine *l1 = arrlin[i];
+ if(l1->GetDistFromPoint(peak)< fDCAcut)
+ arrlin2[nFilled2++] = dynamic_cast<AliStrLine*>(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(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>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());
+ }
+ }
+
+ 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 "<<fLines.GetEntriesFast()<<"; Number of pairs: "<<numsor<<endl;
+ AliITSSortTrkl srt(fLines,numsor,fCutOnPairs,fCoarseMaxRCut);
+ srt.FindClusters();
+ AliInfo(Form("Number of vertices: %d",srt.GetNumberOfClusters()));
+
+ fNoVertices = srt.GetNumberOfClusters();
+ //printf("fNoVertices = %d \n",fNoVertices);
+ if(fNoVertices>0){
+ fVertArray = new AliESDVertex[fNoVertices];
+ for(Int_t kk=0; kk<srt.GetNumberOfClusters(); kk++){
+ Int_t size = 0;
+ Int_t *labels = srt.GetTrackletsLab(kk,size);
+ /*
+ Int_t *pairs = srt.GetClusters(kk);
+ Int_t nopai = srt.GetSizeOfCluster(kk);
+ cout<<"***** Vertex number "<<kk<<". Pairs: \n";
+ for(Int_t jj=0;jj<nopai;jj++){
+ cout<<pairs[jj]<<" - ";
+ if(jj>0 & jj%8==0)cout<<endl;
+ }
+ cout<<endl;
+ cout<<"***** Vertex number "<<kk<<". Labels: \n";
+ */
+ AliStrLine **tclo = new AliStrLine* [size];
+ for(Int_t jj=0;jj<size;jj++){
+ // cout<<labels[jj]<<" - ";
+ // if(jj>0 & jj%8==0)cout<<endl;
+ tclo[jj] = dynamic_cast<AliStrLine*>(fLines[labels[jj]]);
+ }
+ // cout<<endl;
+ delete []labels;
+ fVertArray[kk]=AliVertexerTracks::TrackletVertexFinder(tclo,size);
+ delete [] tclo;
+ // fVertArray[kk].PrintStatus();
+ if(kk == 1){
+ // at least one second vertex is present
+ fIsPileup = kTRUE;
+ fNTrpuv = fVertArray[kk].GetNContributors();
+ fZpuv = fVertArray[kk].GetZv();
+ }
+ }
+ Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv());
+ if(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>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
- TTree *tR = itsClusterTree;
- fDetTypeRec->SetTreeAddressR(tR);
TClonesArray *itsRec = 0;
if(optCuts==0) fZHisto->Reset();
- // 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 = fDetTypeRec->RecPoints();
- TBranch *branch;
- branch = tR->GetBranch("ITSRecPoints");
+ // 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();
+ itsRec=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;
+ 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();
deltaPhi = fDiffPhiMax;
deltaR=fMaxRCut;
dZmax=fMaxZCut;
- }else if(optCuts==2){
+ if(fPileupAlgo == 2){
+ dZmax=fZCutDiamond;
+ deltaR=fMaxRCut2;
+ }
+ } else if(optCuts==2){
xbeam=fVert3D.GetXv();
ybeam=fVert3D.GetYv();
- deltaPhi = fDiffPhiMax;
+ 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();
- fDetTypeRec->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();
- fDetTypeRec->ResetRecPoints();
- }
+ nrpL1=rpcont->GetNClustersInLayerFast(1);
+ nrpL2=rpcont->GetNClustersInLayerFast(2);
if(nrpL1 == 0 || nrpL2 == 0){
+ AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",nrpL1,nrpL2));
return -1;
}
AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",nrpL1,nrpL2));
+ fDoDownScale=kFALSE;
+ Float_t factDownScal=1.;
+ Int_t origLaddersOnLayer2=fLadOnLay2;
+
+ if(nrpL1>fMaxNumOfCl || nrpL2>fMaxNumOfCl){
+ SetLaddersOnLayer2(2);
+ fDoDownScale=kTRUE;
+ factDownScal=(Float_t)fMaxNumOfCl*(Float_t)fMaxNumOfCl/(Float_t)nrpL1/(Float_t)nrpL2;
+ if(optCuts==1){
+ factDownScal*=(fCoarseDiffPhiCut/fDiffPhiMax)*10;
+ if(factDownScal>1.){
+ fDoDownScale=kFALSE;
+ SetLaddersOnLayer2(origLaddersOnLayer2);
+ }
+ }
+ else if(optCuts==2) return -1;
+ if(fDoDownScale)AliDebug(1,Form("Too many recpoints on SPD(%d %d ), downscale by %f",nrpL1,nrpL2,factDownScal));
+ }
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 = 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();
- for(Int_t j=0;j<nrecp1;j++){
- AliITSRecPoint *recp = (AliITSRecPoint*)itsRec->At(j);
- new(prpl1[j])AliITSRecPoint(*recp);
- }
- fDetTypeRec->ResetRecPoints();
+
+ 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;j<nrecp1;j++){
if(j>kMaxCluPerMod) continue;
UShort_t idClu1=modul1*kMaxCluPerMod+j;
if(fUsedCluster.TestBitNumber(idClu1)) continue;
- AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1.At(j);
- // Local coordinates of this recpoint
- /*
- lc[0]=recp1->GetDetLocalX();
- lc[2]=recp1->GetDetLocalZ();
- */
- recp1->GetGlobalXYZ(gc1);
+ if(fDoDownScale && 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 ; ladl2<fLadOnLay2*2+1;ladl2++){
if(ladmod>AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2);
Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1);
if(!fUseModule[modul2]) continue;
- branch->GetEvent(modul2);
+ itsRec=rpcont->UncheckedGetClusters(modul2);
Int_t nrecp2 = itsRec->GetEntries();
for(Int_t j2=0;j2<nrecp2;j2++){
if(j2>kMaxCluPerMod) 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 && diff<fDiffPhiMax){
- Float_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]);
- Float_t zc1=gc1[2];
- Float_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]);
- Float_t zc2=gc2[2];
- Float_t zr0=(r2*zc1-r1*zc2)/(r2-r1); //Z @ null radius
+ if(optCuts==0 && diff<fDiffPhiforPileup){
+ Double_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]);
+ Double_t zc1=gc1[2];
+ Double_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]);
+ Double_t zc2=gc2[2];
+ Double_t zr0=(r2*zc1-r1*zc2)/(r2-r1); //Z @ null radius
fZHisto->Fill(zr0);
}
if(diff>deltaPhi)continue;
Double_t deltaZ=cp[2]-zvert;
if(TMath::Abs(deltaZ)>dZmax)continue;
+
if(nolines == 0){
if(fLines.GetEntriesFast()>0)fLines.Clear("C");
}
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
+ 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
- Float_t curvErr=0;
+ 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,idClu1,idClu2);
}
- fDetTypeRec->ResetRecPoints();
}
}
}
- prpl1.Clear();
}
+
+ if(fDoDownScale){
+ SetLaddersOnLayer2(origLaddersOnLayer2);
+ }
+
+
if(nolines == 0)return -2;
return nolines;
}
// 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;
+ 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;
}
- 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;
+ Double_t origBinSizeR=fBinSizeR;
+ Double_t origBinSizeZ=fBinSizeZ;
+ if(fDoDownScale){
+ SetBinSizeR(0.05);
+ SetBinSizeZ(0.05);
+ }
+
+ 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);
+
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)
AliStrLine *l1 = (AliStrLine*)fLines.At(i);
for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){
AliStrLine *l2 = (AliStrLine*)fLines.At(j);
- Float_t dca=l1->GetDCA(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);
Int_t numbtracklets=0;
for(Int_t i=0; i<fLines.GetEntriesFast();i++)if(validate[i]>=1)numbtracklets++;
- if(numbtracklets<2){delete [] validate; delete h3d; delete h3dcs; return retcode; }
+ if(numbtracklets<2){
+ delete [] validate;
+ delete h3d;
+ delete h3dcs;
+ return retcode;
+ }
for(Int_t i=0; i<fLines.GetEntriesFast();i++){
if(validate[i]<1)fLines.RemoveAt(i);
AliDebug(1,Form("Number of tracklets (after compress)%d ",fLines.GetEntriesFast()));
delete [] validate;
+ // Exit here if Pileup Algorithm 2 has been chosen during second loop
+ if(fPileupAlgo == 2 && optCuts==1){
+ delete h3d;
+ delete h3dcs;
+ return 0;
+ }
+
// Find peaks in histos
Double_t peak[3]={0.,0.,0.};
Int_t ntrkl,ntimes;
FindPeaks(h3d,peak,ntrkl,ntimes);
delete h3d;
-
- if(optCuts==0 && ntrkl<=2){
+ Double_t binsizer=(rh-rl)/nbr;
+ Double_t binsizez=(zh-zl)/nbz;
+ if(optCuts==0 && (ntrkl<=2 || ntimes>1)){
ntrkl=0;
ntimes=0;
FindPeaks(h3dcs,peak,ntrkl,ntimes);
}
delete h3dcs;
+ // Finer Histo in limited range in case of high mult.
+ if(fDoDownScale){
+ 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; i<fLines.GetEntriesFast()-1;i++){
+ AliStrLine *l1 = (AliStrLine*)fLines.At(i);
+ for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){
+ AliStrLine *l2 = (AliStrLine*)fLines.At(j);
+ Double_t point[3];
+ Int_t retc = l1->Cross(l2,point);
+ if(retc<0)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;
+ SetBinSizeR(origBinSizeR);
+ SetBinSizeZ(origBinSizeZ);
+ }
+
+
// Second selection loop
- Float_t bs=(binsizer+binsizez)/2.;
+ Double_t bs=(binsizer+binsizez)/2.;
for(Int_t i=0; i<fLines.GetEntriesFast();i++){
AliStrLine *l1 = (AliStrLine*)fLines.At(i);
if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i);
AliDebug(1,Form("Number of tracklets (after 2nd compression) %d",fLines.GetEntriesFast()));
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; i<fLines.GetEntriesFast();i++) validate2[i]=1;
for(Int_t i=0; i<fLines.GetEntriesFast();i++){
+ if(validate2[i]==0) continue;
AliStrLine *l1 = (AliStrLine*)fLines.At(i);
if(l1->GetDistFromPoint(peak)> fDCAcut)fLines.RemoveAt(i);
+ if(optCuts==2){ // temporarily only for pileup
+ for(Int_t j=i+1; j<fLines.GetEntriesFast();j++){
+ AliStrLine *l2 = (AliStrLine*)fLines.At(j);
+ if(l1->GetDCA(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; i<fLines.GetEntriesFast();i++){
+ if(validate2[i]==0) fLines.RemoveAt(i);
+ }
+ delete [] validate2;
fLines.Compress();
AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast()));
- if(fLines.GetEntriesFast()>1) 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
+void AliITSVertexer3D::SetMeanPPtSelTracks(Double_t fieldTesla){
+ // Sets mean values of Pt based on the field
+ // for P (used in multiple scattering) the most probable value is used
if(TMath::Abs(fieldTesla-0.5)<0.01){
- SetMeanPSelTracks(0.885);
+ SetMeanPSelTracks(0.375);
SetMeanPtSelTracks(0.630);
}else if(TMath::Abs(fieldTesla-0.4)<0.01){
- SetMeanPSelTracks(0.805);
+ SetMeanPSelTracks(0.375);
SetMeanPtSelTracks(0.580);
}else if(TMath::Abs(fieldTesla-0.2)<0.01){
- SetMeanPSelTracks(0.740);
+ SetMeanPSelTracks(0.375);
SetMeanPtSelTracks(0.530);
}else if(fieldTesla<0.00001){
- SetMeanPSelTracks(0.730);
- SetMeanPtSelTracks(0.510);
+ SetMeanPSelTracks(0.375);
+ SetMeanPtSelTracks(0.230);
}else{
SetMeanPSelTracks();
SetMeanPtSelTracks();
peak[2]=0.;
nOfTracklets = 0;
nOfTimes=0;
+ Int_t peakbin[3]={0,0,0};
+ Int_t peak2bin[3]={-1,-1,-1};
+ Int_t bc2=-1;
for(Int_t i=xax->GetFirst();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){
- nOfTimes++;
+ 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(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
fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0);
if(fVert3D.GetNContributors()>=fMinTrackletsForPilup){
fIsPileup=kTRUE;
+ fNoVertices=2;
+ fVertArray = new AliESDVertex[2];
+ fVertArray[0]=(*fCurrentVertex);
+ fVertArray[1]=fVert3D;
fZpuv=fVert3D.GetZv();
fNTrpuv=fVert3D.GetNContributors();
}
Int_t nPeaks=AliITSVertexerZ::GetPeakRegion(fZHisto,binmin,binmax);
if(nPeaks==2)AliWarning("2 peaks found");
Int_t firstPeakCont=0;
- Float_t firstPeakPos=0.;
+ Double_t firstPeakPos=0.;
for(Int_t i=binmin-1;i<=binmax+1;i++){
- firstPeakCont+=fZHisto->GetBinContent(i);
+ firstPeakCont+=static_cast<Int_t>(fZHisto->GetBinContent(i));
firstPeakPos+=fZHisto->GetBinContent(i)*fZHisto->GetBinCenter(i);
}
- firstPeakPos/=firstPeakCont;
- Int_t ncontr2=0;
- if(firstPeakCont>fMinTrackletsForPilup){
- Float_t secPeakPos;
- ncontr2=AliITSVertexerZ::FindSecondPeak(fZHisto,binmin,binmax,secPeakPos);
- if(ncontr2>=fMinTrackletsForPilup){
- fIsPileup=kTRUE;
- fZpuv=secPeakPos;
- fNTrpuv=ncontr2;
+ 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;
+ }
}
}
}
//________________________________________________________
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("========= 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 vetrtex for pileup: %f\n",fDCAforPileup);
+ 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 allowed on L1 or L2: %d\n",fMaxNumOfCl);
printf("=======================================================\n");
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff