#include<TH1.h>
#include <TString.h>
#include<TTree.h>
-#include "AliITSLoader.h"
-#include "AliITSgeom.h"
-#include "AliITSDetTypeRec.h"
+#include "AliESDVertex.h"
+#include "AliITSgeomTGeo.h"
#include "AliITSRecPoint.h"
+#include "AliITSRecPointContainer.h"
#include "AliITSZPoint.h"
/////////////////////////////////////////////////////////////////
// It can be used successfully with Pb-Pb collisions
////////////////////////////////////////////////////////////////
+using std::endl;
+using std::cout;
ClassImp(AliITSVertexerZ)
fStepCoarse(0),
fTolerance(0.),
fMaxIter(0),
-fWindowWidth(0) {
+fWindowWidth(0),
+fSearchForPileup(kTRUE)
+{
// Default constructor
SetDiffPhiMax();
SetFirstLayerModules();
}
//______________________________________________________________________
-AliITSVertexerZ::AliITSVertexerZ(TString fn, Float_t x0, Float_t y0):AliITSVertexer(fn),
+AliITSVertexerZ::AliITSVertexerZ(Float_t x0, Float_t y0):AliITSVertexer(),
fFirstL1(0),
fLastL1(0),
fFirstL2(0),
fStepCoarse(0),
fTolerance(0.),
fMaxIter(0),
-fWindowWidth(0) {
+fWindowWidth(0),
+fSearchForPileup(kTRUE)
+{
// Standard Constructor
SetDiffPhiMax();
SetFirstLayerModules();
}
-//______________________________________________________________________
-AliITSVertexerZ::AliITSVertexerZ(const AliITSVertexerZ &vtxr) : AliITSVertexer(vtxr),
-fFirstL1(vtxr.fFirstL1),
-fLastL1(vtxr.fLastL1),
-fFirstL2(vtxr.fFirstL2),
-fLastL2(vtxr.fLastL2),
-fDiffPhiMax(vtxr.fDiffPhiMax),
-fZFound(vtxr.fZFound),
-fZsig(vtxr.fZsig),
-fZCombc(vtxr.fZCombc),
-fLowLim(vtxr.fLowLim),
-fHighLim(vtxr.fHighLim),
-fStepCoarse(vtxr.fStepCoarse),
-fTolerance(vtxr.fTolerance),
-fMaxIter(vtxr.fMaxIter),
-fWindowWidth(vtxr.fWindowWidth){
- // Copy constructor
-
-}
-
-//______________________________________________________________________
-AliITSVertexerZ& AliITSVertexerZ::operator=(const AliITSVertexerZ& vtxr ){
- // Assignment operator
-
- this->~AliITSVertexerZ();
- new(this) AliITSVertexerZ(vtxr);
- return *this;
-}
-
//______________________________________________________________________
AliITSVertexerZ::~AliITSVertexerZ() {
// Destructor
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");
}
//______________________________________________________________________
-Int_t AliITSVertexerZ::GetPeakRegion(TH1F*h, Int_t &binmin, Int_t &binmax) const {
+Int_t AliITSVertexerZ::GetPeakRegion(TH1F*h, Int_t &binmin, Int_t &binmax){
// Finds a region around a peak in the Z histogram
// Case of 2 peaks is treated
Int_t imax=h->GetNbinsX();
return npeaks;
}
//______________________________________________________________________
-AliESDVertex* AliITSVertexerZ::FindVertexForCurrentEvent(Int_t evnumber){
+AliESDVertex* AliITSVertexerZ::FindVertexForCurrentEvent(TTree *itsClusterTree){
// Defines the AliESDVertex for the current event
- VertexZFinder(evnumber);
+ VertexZFinder(itsClusterTree);
Int_t ntrackl=0;
for(Int_t iteraz=0;iteraz<fMaxIter;iteraz++){
if(fCurrentVertex) ntrackl=fCurrentVertex->GetNContributors();
if(!fCurrentVertex || ntrackl==0 || ntrackl==-1){
Float_t diffPhiMaxOrig=fDiffPhiMax;
fDiffPhiMax=GetPhiMaxIter(iteraz);
- VertexZFinder(evnumber);
+ VertexZFinder(itsClusterTree);
fDiffPhiMax=diffPhiMaxOrig;
}
}
- FindMultiplicity(evnumber);
+ if(fComputeMultiplicity) FindMultiplicity(itsClusterTree);
return fCurrentVertex;
}
//______________________________________________________________________
-void AliITSVertexerZ::VertexZFinder(Int_t evnumber){
+void AliITSVertexerZ::VertexZFinder(TTree *itsClusterTree){
// Defines the AliESDVertex for the current event
+ delete fCurrentVertex;
fCurrentVertex = 0;
- AliRunLoader *rl =AliRunLoader::GetRunLoader();
- AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
- AliITSgeom* geom = itsLoader->GetITSgeom();
- itsLoader->LoadRecPoints();
- rl->GetEvent(evnumber);
-
- AliITSDetTypeRec detTypeRec;
-
- TTree *tR = itsLoader->TreeR();
- detTypeRec.SetTreeAddressR(tR);
+ 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.;
-
- itsRec = detTypeRec.RecPoints();
- TBranch *branch;
- branch = tR->GetBranch("ITSRecPoints");
+ Float_t gc2[3]={0.,0.,0.}; //; for(Int_t ii=0; ii<3; ii++) gc2[ii]=0.;
+ AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
+ rpcont->FetchClusters(0,itsClusterTree);
+ if(!rpcont->IsSPDActive()){
+ AliWarning("Null pointer for RecPoints branch, vertex not calculated");
+ ResetHistograms();
+ 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++){
- branch->GetEvent(module);
- nrpL1+= itsRec->GetEntries();
- detTypeRec.ResetRecPoints();
- }
- //By default fFirstL2=80 and fLastL2=239
- for(Int_t module= fFirstL2; module<=fLastL2;module++){
- branch->GetEvent(module);
- nrpL2+= itsRec->GetEntries();
- detTypeRec.ResetRecPoints();
- }
if(nrpL1 == 0 || nrpL2 == 0){
+ AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",nrpL1,nrpL2));
ResetHistograms();
- itsLoader->UnloadRecPoints();
- 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
- TClonesArray *points = new TClonesArray("AliITSZPoint",maxdim);
- TClonesArray &pts = *points;
+ 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
- branch->GetEvent(modul1);
- Int_t nrecp1 = itsRec->GetEntries();
- TClonesArray *prpl1 = new TClonesArray("AliITSRecPoint",nrecp1);
- prpl1->SetOwner();
- TClonesArray &rpl1 = *prpl1;
- for(Int_t j=0;j<nrecp1;j++){
- AliITSRecPoint *recp = (AliITSRecPoint*)itsRec->At(j);
- new(rpl1[j])AliITSRecPoint(*recp);
- }
- detTypeRec.ResetRecPoints();
+ 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);
- lc1[0]=recp->GetDetLocalX();
- lc1[2]=recp->GetDetLocalZ();
- geom->LtoG(modul1,lc1,gc1);
- // Global coordinates of this recpoints
- gc1[0]-=fNominalPos[0]; // Possible beam offset in the bending plane
- gc1[1]-=fNominalPos[1]; // " "
- Float_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]);
+ 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 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>geom->GetNladders(2)) ladmod=ladmod-geom->GetNladders(2);
- Int_t modul2=geom->GetModuleIndex(2,ladmod,k+1);
- branch->GetEvent(modul2);
- Int_t nrecp2 = itsRec->GetEntries();
+ if(ladmod>AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2);
+ Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1);
+ if(modul2<0)continue;
+ if(!fUseModule[modul2]) continue;
+ 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);
- lc2[0]=recp->GetDetLocalX();
- lc2[2]=recp->GetDetLocalZ();
- geom->LtoG(modul2,lc2,gc2);
- gc2[0]-=fNominalPos[0];
- gc2[1]-=fNominalPos[1];
- Float_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]);
+ AliITSRecPoint *recp2 = (AliITSRecPoint*)itsRec->At(j2);
+ recp2->GetGlobalXYZ(gc2);
+ gc2[0]-=GetNominalPos()[0];
+ gc2[1]-=GetNominalPos()[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
- */
- if(nopoints<maxdim) new(pts[nopoints++])AliITSZPoint(zr0,ezr0q);
+ 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);
}
}
- detTypeRec.ResetRecPoints();
}
}
}
- delete prpl1;
}
- points->Sort();
+ points.Sort();
Double_t contents = fZCombc->GetEntries()- fZCombc->GetBinContent(0)-fZCombc->GetBinContent(nbincoarse+1);
if(contents<1.){
// Warning("FindVertexForCurrentEvent","Insufficient number of rec. points\n");
ResetHistograms();
- itsLoader->UnloadRecPoints();
- fCurrentVertex = new AliESDVertex(0.,5.3,-1);
+ fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-1);
+ points.Clear();
return;
}
TH1F *hc = fZCombc;
- if(hc->GetBinContent(hc->GetMaximumBin())<3)hc->Rebin(3);
+ 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.;
zm=0.;
ezm=0.;
ncontr=0;
- for(Int_t i =0; i<points->GetEntriesFast(); i++){
- AliITSZPoint* p=(AliITSZPoint*)points->UncheckedAt(i);
+ for(Int_t i =0; i<points.GetEntriesFast(); i++){
+ AliITSZPoint* p=(AliITSZPoint*)points.UncheckedAt(i);
if(p->GetZ()>lim1 && p->GetZ()<lim2){
Float_t deno = p->GetErrZ();
zm+=p->GetZ()/deno;
ncontr++;
}
}
- zm/=ezm;
- ezm=TMath::Sqrt(1./ezm);
+ if(ezm>0) {
+ zm/=ezm;
+ ezm=TMath::Sqrt(1./ezm);
+ }
niter++;
} while(niter<10 && TMath::Abs((zm-lim1)-(lim2-zm))>fTolerance);
- fCurrentVertex = new AliESDVertex(zm,ezm,ncontr);
- fCurrentVertex->SetTitle("vertexer: B");
- delete points;
+ 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(fSearchForPileup && ncontr>fMinTrackletsForPilup){
+ Float_t secPeakPos;
+ Int_t ncontr2=FindSecondPeak(fZCombc,binmin,binmax,secPeakPos);
+ if(ncontr2>=fMinTrackletsForPilup){
+ fIsPileup=kTRUE;
+ fNoVertices=2;
+ fZpuv=secPeakPos;
+ fNTrpuv=ncontr2;
+ AliESDVertex secondVert(secPeakPos,0.1,ncontr2);
+ fVertArray = new AliESDVertex[2];
+ fVertArray[0]=(*fCurrentVertex);
+ fVertArray[1]=secondVert;
+ }
+ }
+ if(fNoVertices==1){
+ fVertArray = new AliESDVertex[1];
+ fVertArray[0]=(*fCurrentVertex);
+ }
+
ResetHistograms();
- itsLoader->UnloadRecPoints();
return;
}
-
+//_____________________________________________________________________
+Int_t AliITSVertexerZ::FindSecondPeak(TH1F* h, Int_t binmin,Int_t binmax, Float_t& secPeakPos){
+ // Resets bin contents between binmin and binmax and then search
+ // for a second peak position
+ for(Int_t i=binmin-1;i<=binmax+1;i++){
+ h->SetBinContent(i,0.);
+ }
+ Int_t secPeakBin=h->GetMaximumBin();
+ secPeakPos=h->GetBinCenter(secPeakBin);
+ Int_t secPeakCont=(Int_t)h->GetBinContent(secPeakBin);
+ secPeakCont+=(Int_t)h->GetBinContent(secPeakBin-1);
+ secPeakCont+=(Int_t)h->GetBinContent(secPeakBin+1);
+ secPeakCont+=(Int_t)h->GetBinContent(secPeakBin-2);
+ secPeakCont+=(Int_t)h->GetBinContent(secPeakBin+2);
+ return secPeakCont;
+}
//_____________________________________________________________________
void AliITSVertexerZ::ResetHistograms(){
fZCombc = 0;
}
-//______________________________________________________________________
-void AliITSVertexerZ::FindVertices(){
- // computes the vertices of the events in the range FirstEvent - LastEvent
- AliRunLoader *rl = AliRunLoader::GetRunLoader();
- AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
- itsLoader->ReloadRecPoints();
- for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
- // cout<<"Processing event "<<i<<endl;
- rl->GetEvent(i);
- FindVertexForCurrentEvent(i);
- if(fCurrentVertex){
- WriteCurrentVertex();
- }
- }
-}
-
//________________________________________________________
void AliITSVertexerZ::PrintStatus() const {
// Print current status
cout <<"Limits for Z histograms: "<<fLowLim<<"; "<<fHighLim<<endl;
cout <<"Bin sizes for coarse z histos "<<fStepCoarse<<endl;
cout <<" Current Z "<<fZFound<<"; Z sig "<<fZsig<<endl;
- cout <<"First event to be processed "<<fFirstEvent;
- cout <<"\n Last event to be processed "<<fLastEvent<<endl;
if(fZCombc){
cout<<"fZCombc exists - entries="<<fZCombc->GetEntries()<<endl;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff