#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
/* $Id$ */
//______________________________________________________________________
-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.),
+ 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)
{
// Default constructor
SetCoarseDiffPhiCut();
+ SetFineDiffPhiCut();
+ SetCutOnPairs();
SetCoarseMaxRCut();
SetMaxRCut();
SetZCutDiamond();
SetDiffPhiMax();
SetMeanPSelTracks();
SetMeanPtSelTracks();
+ SetMinDCAforPileup();
+ SetDeltaPhiforPileup();
+ SetPileupAlgo();
+ 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);
}
//______________________________________________________________________
AliITSVertexer3D::~AliITSVertexer3D() {
// Destructor
fLines.Clear("C");
+ if(fZHisto) delete fZHisto;
}
//______________________________________________________________________
void AliITSVertexer3D::ResetVert3D(){
//
+ 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;
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);
- }
- }
- /* 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());
- }
+ if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative();
+ else if(fPileupAlgo<2 && rc == 0) FindVertex3D(itsClusterTree);
}
+
if(!fCurrentVertex){
AliITSVertexerZ vertz(GetNominalPos()[0],GetNominalPos()[1]);
+ vertz.SetDetTypeRec(GetDetTypeRec());
AliDebug(1,"Call Vertexer Z\n");
vertz.SetLowLimit(-fZCutDiamond);
vertz.SetHighLimit(fZCutDiamond);
fCurrentVertex->SetTitle("vertexer: Z");
fCurrentVertex->SetName("SPDVertexZ");
delete vtxz;
- // printf("Vertexer Z success\n");
}
}
return fCurrentVertex;
}
+//______________________________________________________________________
+void AliITSVertexer3D::FindVertex3D(TTree *itsClusterTree){
+ // 3D algorithm
+ /* 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");
+ Int_t nolines = FindTracklets(itsClusterTree,1);
+ if(nolines>=2){
+ Int_t rc=Prepare3DVertex(1);
+ 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 */
+
+ 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(){
+ // 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
- AliITSDetTypeRec detTypeRec;
+
+ if(!GetDetTypeRec())AliFatal("DetTypeRec pointer has not been set");
TTree *tR = itsClusterTree;
- detTypeRec.SetTreeAddressR(tR);
+ fDetTypeRec->ResetRecPoints();
+ fDetTypeRec->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;
+ 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.};
+
+ itsRec = fDetTypeRec->RecPoints();
+ TBranch *branch = NULL;
branch = tR->GetBranch("ITSRecPoints");
+ if(!branch){
+ AliError("Null pointer for RecPoints branch");
+ 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(fPileupAlgo == 2){
+ deltaPhi=fFineDiffPhiCut;
+ deltaR=fMaxRCut;
+ if(optCuts != 0)AliWarning(Form("fPileupAlgo=2 AND optCuts=%d has been selected. It should be 0",optCuts));
+ } else if(optCuts==1){
xbeam=fVert3D.GetXv();
ybeam=fVert3D.GetYv();
zvert=fVert3D.GetZv();
deltaPhi = fDiffPhiMax;
deltaR=fMaxRCut;
dZmax=fMaxZCut;
+ } 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
for(Int_t module= firstL1; module<=lastL1;module++){ // count number of recopints on layer 1
branch->GetEvent(module);
nrpL1+= itsRec->GetEntries();
- detTypeRec.ResetRecPoints();
+ fDetTypeRec->ResetRecPoints();
}
//By default firstL2=80 and lastL2=239
Int_t firstL2 = AliITSgeomTGeo::GetModuleIndex(2,1,1);
for(Int_t module= firstL2; module<=lastL2;module++){ // count number of recopints on layer 2
branch->GetEvent(module);
nrpL2+= itsRec->GetEntries();
- detTypeRec.ResetRecPoints();
+ fDetTypeRec->ResetRecPoints();
}
if(nrpL1 == 0 || nrpL2 == 0){
return -1;
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
for(Int_t modul1= firstL1; modul1<=lastL1;modul1++){ // Loop on modules of layer 1
AliITSRecPoint *recp = (AliITSRecPoint*)itsRec->At(j);
new(prpl1[j])AliITSRecPoint(*recp);
}
- detTypeRec.ResetRecPoints();
+ fDetTypeRec->ResetRecPoints();
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);
+ 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++){
branch->GetEvent(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){
+ 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;
AliStrLine line(gc1,gc2,kTRUE);
Double_t cp[3];
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();
+ fDetTypeRec->ResetRecPoints();
}
}
}
// 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;
+ if(fPileupAlgo == 2) {
+ deltaR=fMaxRCut;
+ if(optCuts!=0)AliWarning(Form("fPileupAlgo=2 AND optCuts=%d. It should be 0",optCuts));
+ }
+ Double_t dZmax=fZCutDiamond;
+ if(optCuts==1){
xbeam=fVert3D.GetXv();
ybeam=fVert3D.GetYv();
zvert=fVert3D.GetZv();
deltaR=fMaxRCut;
dZmax=fMaxZCut;
+ }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;
- 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);
-
+ 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 = NULL;
+ TH3F *h3dcs = NULL;
+ if(fPileupAlgo !=2){
+ h3d = new TH3F("h3d","xyz distribution",nbr,rl,rh,nbr,rl,rh,nbz,zl,zh);
+ 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; i<fLines.GetEntriesFast();i++)validate[i]=0;
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);
if(raddist>deltaR)continue;
validate[i]=1;
validate[j]=1;
- h3d->Fill(point[0],point[1],point[2]);
- h3dcs->Fill(point[0],point[1],point[2]);
+ if(fPileupAlgo != 2){
+ h3d->Fill(point[0],point[1],point[2]);
+ h3dcs->Fill(point[0],point[1],point[2]);
+ }
}
}
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; return retcode; }
+ if(numbtracklets<2){
+ delete [] validate;
+ if(fPileupAlgo != 2){
+ 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
+ if(fPileupAlgo == 2)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);
// 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
}
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){
+ 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; i<fLines.GetEntriesFast();i++){
+ AliStrLine *lin = (AliStrLine*)fLines.At(i);
+ Int_t idClu1=lin->GetIdPoint(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; i<fLines.GetEntriesFast();i++){
+ AliStrLine *lin = (AliStrLine*)fLines.At(i);
+ if(lin->GetDistFromPoint(vert)<fDCAforPileup){
+ Int_t idClu1=lin->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
+ 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;
+ fNoVertices=2;
+ fVertArray = new AliESDVertex[2];
+ fVertArray[0]=(*fCurrentVertex);
+ fVertArray[1]=fVert3D;
+ fZpuv=fVert3D.GetZv();
+ fNTrpuv=fVert3D.GetNContributors();
}
}
}
}
-
}
-
+//______________________________________________________________________
+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<Int_t>(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;
+ }
+ }
+ }
+}
//________________________________________________________
void AliITSVertexer3D::PrintStatus() const {
// Print current status
printf("Cut on tracklet DCA to beam axis %f\n",fMaxRCut);
printf("Cut on diamond (Z) %f\n",fZCutDiamond);
printf("Cut on DCA - tracklet to tracklet and to vertex %f\n",fDCAcut);
- printf(" Max Phi difference: %f\n",fDiffPhiMax);
+ printf("Max Phi difference: %f\n",fDiffPhiMax);
+ printf("Pileup algo: %d\n",fPileupAlgo);
+ printf("Min DCA to 1st vetrtex for pileup: %f\n",fDCAforPileup);
printf("=======================================================\n");
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff