void AliITSVertexerZ::ConfigIterations(Int_t noiter,Float_t *ptr){
// configure the iterative procedure to gain efficiency for
// pp events with very low multiplicity
- Float_t defaults[5]={0.05,0.1,0.2,0.3,0.5};
+ Float_t defaults[5]={0.02,0.05,0.1,0.2,0.3};
fMaxIter=noiter;
if(noiter>5){
Error("ConfigIterations","Maximum number of iterations is 5\n");
fDiffPhiMax=diffPhiMaxOrig;
}
}
- FindMultiplicity(itsClusterTree);
+ if(fComputeMultiplicity) FindMultiplicity(itsClusterTree);
return fCurrentVertex;
}
void AliITSVertexerZ::VertexZFinder(TTree *itsClusterTree){
// Defines the AliESDVertex for the current event
fCurrentVertex = 0;
+ Double_t startPos[3]={GetNominalPos()[0],GetNominalPos()[1],GetNominalPos()[2]};
+ Double_t startCov[6]={GetNominalCov()[0],GetNominalCov()[1],GetNominalCov()[2],
+ GetNominalCov()[3],GetNominalCov()[4],GetNominalCov()[5]};
ResetVertex();
TClonesArray *itsRec = 0;
// lc1 and gc1 are local and global coordinates for layer 1
- Float_t lc1[3]; for(Int_t ii=0; ii<3; ii++) lc1[ii]=0.;
- Float_t gc1[3]; for(Int_t ii=0; ii<3; ii++) gc1[ii]=0.;
+ Float_t gc1[3]={0.,0.,0.}; // ; for(Int_t ii=0; ii<3; ii++) gc1[ii]=0.;
// lc2 and gc2 are local and global coordinates for layer 2
- Float_t lc2[3]; for(Int_t ii=0; ii<3; ii++) lc2[ii]=0.;
- Float_t gc2[3]; for(Int_t ii=0; ii<3; ii++) gc2[ii]=0.;
+ Float_t gc2[3]={0.,0.,0.}; //; for(Int_t ii=0; ii<3; ii++) gc2[ii]=0.;
AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
itsRec=rpcont->FetchClusters(0,itsClusterTree);
if(!rpcont->IsSPDActive()){
AliWarning("Null pointer for RecPoints branch, vertex not calculated");
ResetHistograms();
- fCurrentVertex = new AliESDVertex(0.,5.3,-2);
+ fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-2);
return;
}
Int_t nrpL1 = 0;
Int_t nrpL2 = 0;
+ nrpL1=rpcont->GetNClustersInLayerFast(1);
+ nrpL2=rpcont->GetNClustersInLayerFast(2);
- // By default fFirstL1=0 and fLastL1=79
- for(Int_t module= fFirstL1; module<=fLastL1;module++){
- itsRec=rpcont->UncheckedGetClusters(module);
- nrpL1+= itsRec->GetEntries();
- }
- //By default fFirstL2=80 and fLastL2=239
- for(Int_t module= fFirstL2; module<=fLastL2;module++){
- itsRec=rpcont->UncheckedGetClusters(module);
- nrpL2+= itsRec->GetEntries();
- }
if(nrpL1 == 0 || nrpL2 == 0){
AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",nrpL1,nrpL2));
ResetHistograms();
- fCurrentVertex = new AliESDVertex(0.,5.3,-2);
+ fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-2);
return;
}
// Force a coarse bin size of 200 microns if the number of clusters on layer 2
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);
*/
+ Int_t nEntriesMod[kNSPDMod];
+ TClonesArray* recpArr[kNSPDMod];
+ for(Int_t modul=0; modul<kNSPDMod; ++modul) {
+ if(!fUseModule[modul]) {
+ nEntriesMod[modul]=0;
+ recpArr[modul]=0;
+ } else {
+ recpArr[modul]=rpcont->UncheckedGetClusters(modul);
+ nEntriesMod[modul]=recpArr[modul]->GetEntriesFast();
+ }
+ }
+
Int_t maxdim=TMath::Min(nrpL1*nrpL2,50000); // temporary; to limit the size in PbPb
static TClonesArray points("AliITSZPoint",maxdim);
Int_t nopoints =0;
for(Int_t modul1= fFirstL1; modul1<=fLastL1;modul1++){ // Loop on modules of layer 1
if(!fUseModule[modul1]) continue;
UShort_t ladder=int(modul1/4)+1; // ladders are numbered starting from 1
- TClonesArray *prpl1=rpcont->UncheckedGetClusters(modul1);
- Int_t nrecp1 = prpl1->GetEntries();
+ TClonesArray *prpl1=recpArr[modul1]; //rpcont->UncheckedGetClusters(modul1);
+ Int_t nrecp1 = nEntriesMod[modul1]; //prpl1->GetEntries();
for(Int_t j1=0;j1<nrecp1;j1++){
- AliITSRecPoint *recp = (AliITSRecPoint*)prpl1->At(j1);
- recp->GetGlobalXYZ(gc1);
+ AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1->At(j1);
+ recp1->GetGlobalXYZ(gc1);
gc1[0]-=GetNominalPos()[0]; // Possible beam offset in the bending plane
gc1[1]-=GetNominalPos()[1]; // " "
- Float_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]);
Float_t phi1 = TMath::ATan2(gc1[1],gc1[0]);
- if(phi1<0)phi1+=2*TMath::Pi();
- Float_t zc1=gc1[2];
- Float_t erz1=recp->GetSigmaZ2();
+ if(phi1<0)phi1+=TMath::TwoPi();
for(Int_t ladl2=0 ; ladl2<fLadOnLay2*2+1;ladl2++){
for(Int_t k=0;k<4;k++){
Int_t ladmod=fLadders[ladder-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;
- itsRec=rpcont->UncheckedGetClusters(modul2);
- Int_t nrecp2 = itsRec->GetEntries();
+ itsRec=recpArr[modul2]; // rpcont->UncheckedGetClusters(modul2);
+ Int_t nrecp2 = nEntriesMod[modul2]; // itsRec->GetEntries();
for(Int_t j2=0;j2<nrecp2;j2++){
- recp = (AliITSRecPoint*)itsRec->At(j2);
- recp->GetGlobalXYZ(gc2);
+ AliITSRecPoint *recp2 = (AliITSRecPoint*)itsRec->At(j2);
+ recp2->GetGlobalXYZ(gc2);
gc2[0]-=GetNominalPos()[0];
gc2[1]-=GetNominalPos()[1];
- Float_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]);
Float_t phi2 = TMath::ATan2(gc2[1],gc2[0]);
- if(phi2<0)phi2+=2*TMath::Pi();
- Float_t zc2=gc2[2];
- Float_t erz2=recp->GetSigmaZ2();
+ if(phi2<0)phi2+=TMath::TwoPi();
Float_t diff = TMath::Abs(phi2-phi1);
- if(diff>TMath::Pi())diff=2.*TMath::Pi()-diff;
+ if(diff>TMath::Pi())diff=TMath::TwoPi()-diff;
if(diff<fDiffPhiMax){
+ Float_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]);
+ Float_t zc1=gc1[2];
+ Float_t erz1=recp1->GetSigmaZ2();
+ Float_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]);
+ Float_t zc2=gc2[2];
+ Float_t erz2=recp2->GetSigmaZ2();
// Float_t tgth=(zc2[j]-zc1[i])/(r2-r1); // slope (used for multiple scattering)
Float_t zr0=(r2*zc1-r1*zc2)/(r2-r1); //Z @ null radius
- Float_t ezr0q=(r2*r2*erz1+r1*r1*erz2)/(r2-r1)/(r2-r1); //error on Z @ null radius
- /*
- // Multiple scattering
- ezr0q+=r1*r1*(1+tgth*tgth)*theta2L1/2; // multiple scattering in layer 1
- ezr0q+=rBP*rBP*(1+tgth*tgth)*theta2BP/2; // multiple scattering in beam pipe
- */
+ Float_t ezr0q=(r2*r2*erz1+r1*r1*erz2)/((r2-r1)*(r2-r1)); //error on Z @ null radius
+ /*
+ // Multiple scattering
+ ezr0q+=r1*r1*(1+tgth*tgth)*theta2L1/2; // multiple scattering in layer 1
+ ezr0q+=rBP*rBP*(1+tgth*tgth)*theta2BP/2; // multiple scattering in beam pipe
+ */
if(nopoints<maxdim) new(points[nopoints++])AliITSZPoint(zr0,ezr0q);
fZCombc->Fill(zr0);
}
if(contents<1.){
// Warning("FindVertexForCurrentEvent","Insufficient number of rec. points\n");
ResetHistograms();
- fCurrentVertex = new AliESDVertex(0.,5.3,-1);
+ fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-1);
points.Clear();
return;
}
if(hc->GetBinContent(hc->GetMaximumBin())<3)hc->Rebin(4);
Int_t binmin,binmax;
Int_t nPeaks=GetPeakRegion(hc,binmin,binmax);
- if(nPeaks==2)AliWarning("2 peaks found");
+ if(nPeaks==2)AliDebug(2,"2 peaks found");
Float_t zm =0.;
Float_t ezm =0.;
Float_t lim1 = hc->GetBinLowEdge(binmin);
Float_t lim2 = hc->GetBinLowEdge(binmax)+hc->GetBinWidth(binmax);
+ Float_t widthSR=lim2-lim1;
if(nPeaks ==1 && (lim2-lim1)<fWindowWidth){
Float_t c=(lim1+lim2)/2.;
}
niter++;
} while(niter<10 && TMath::Abs((zm-lim1)-(lim2-zm))>fTolerance);
- fCurrentVertex = new AliESDVertex(zm,ezm,ncontr);
+ if(nPeaks==2) ezm=widthSR;
+ Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],zm};
+ Double_t covmatrix[6]={GetNominalCov()[0],0.,GetNominalCov()[2],0.,0.,ezm};
+ fCurrentVertex = new AliESDVertex(position,covmatrix,99999.,ncontr);
fCurrentVertex->SetTitle("vertexer: Z");
+ fCurrentVertex->SetDispersion(fDiffPhiMax);
fNoVertices=1;
points.Clear();
if(ncontr>fMinTrackletsForPilup){
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff