#include "AliITSVertexerZ.h"
#include<TBranch.h>
#include<TClonesArray.h>
-#include<TFile.h>
#include<TH1.h>
#include <TString.h>
#include<TTree.h>
+#include "AliRunLoader.h"
#include "AliITSLoader.h"
-#include "AliITSgeom.h"
+#include "AliITSgeomTGeo.h"
#include "AliITSDetTypeRec.h"
#include "AliITSRecPoint.h"
#include "AliITSZPoint.h"
-#include "AliHeader.h"
-#include "AliGenEventHeader.h"
/////////////////////////////////////////////////////////////////
// this class implements a fast method to determine
fFirstL2(0),
fLastL2(0),
fDiffPhiMax(0),
-fX0(0.),
-fY0(0.),
fZFound(0),
fZsig(0.),
fZCombc(0),
fFirstL2(0),
fLastL2(0),
fDiffPhiMax(0),
-fX0(x0),
-fY0(y0),
fZFound(0),
fZsig(0.),
fZCombc(0),
SetPPsetting();
ConfigIterations();
SetWindowWidth();
+ SetVtxStart((Double_t)x0,(Double_t)y0,0.);
}
fFirstL2(vtxr.fFirstL2),
fLastL2(vtxr.fLastL2),
fDiffPhiMax(vtxr.fDiffPhiMax),
-fX0(vtxr.fX0),
-fY0(vtxr.fY0),
fZFound(vtxr.fZFound),
fZsig(vtxr.fZsig),
fZCombc(vtxr.fZCombc),
return fCurrentVertex;
}
-
-
-
//______________________________________________________________________
void AliITSVertexerZ::VertexZFinder(Int_t evnumber){
// Defines the AliESDVertex for the current event
fCurrentVertex = 0;
AliRunLoader *rl =AliRunLoader::GetRunLoader();
AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
- AliITSgeom* geom = itsLoader->GetITSgeom();
+ // AliITSgeom* geom = itsLoader->GetITSgeom();
itsLoader->LoadRecPoints();
rl->GetEvent(evnumber);
TTree *tR = itsLoader->TreeR();
detTypeRec.SetTreeAddressR(tR);
TClonesArray *itsRec = 0;
- // lc and gc are local and global coordinates for layer 1
- Float_t lc[3]; for(Int_t ii=0; ii<3; ii++) lc[ii]=0.;
- Float_t gc[3]; for(Int_t ii=0; ii<3; ii++) gc[ii]=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.;
// 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.;
Int_t nrpL1 = 0;
Int_t nrpL2 = 0;
+
// By default fFirstL1=0 and fLastL1=79
- // This loop counts the number of recpoints on layer1 (central modules)
for(Int_t module= fFirstL1; module<=fLastL1;module++){
- // Keep only central modules
- // if(module%4==0 || module%4==3)continue;
- // cout<<"Procesing module "<<module<<" ";
branch->GetEvent(module);
- // cout<<"Number of clusters "<<clusters->GetEntries()<<endl;
nrpL1+= itsRec->GetEntries();
detTypeRec.ResetRecPoints();
}
//By default fFirstL2=80 and fLastL2=239
- //This loop counts the number of RP on layer 2
for(Int_t module= fFirstL2; module<=fLastL2;module++){
branch->GetEvent(module);
nrpL2+= itsRec->GetEntries();
fCurrentVertex = new AliESDVertex(0.,5.3,-2);
return;
}
- // The vertex finding is attempted only if the number of RP is !=0 on
- // both layers
- Float_t *xc1 = new Float_t [nrpL1]; // coordinates of the L1 Recpoints
- Float_t *yc1 = new Float_t [nrpL1];
- Float_t *zc1 = new Float_t [nrpL1];
- Float_t *phi1 = new Float_t [nrpL1];
- Float_t *err1 = new Float_t [nrpL1];
- Float_t *xc2 = new Float_t [nrpL2]; // coordinates of the L1 Recpoints
- Float_t *yc2 = new Float_t [nrpL2];
- Float_t *zc2 = new Float_t [nrpL2];
- Float_t *phi2 = new Float_t [nrpL2];
- Float_t *err2 = new Float_t [nrpL2];
- Int_t ind = 0;// running index for RP
// Force a coarse bin size of 200 microns if the number of clusters on layer 2
// is low
if(nrpL2<fPPsetting[0])SetBinWidthCoarse(fPPsetting[1]);
if(fZCombc)delete fZCombc;
fZCombc = new TH1F("fZCombc","Z",nbincoarse,fLowLim,fLowLim+nbincoarse*fStepCoarse);
- // Loop on modules of layer 1
-
- for(Int_t module= fFirstL1; module<=fLastL1;module++){
- // if(module%4==0 || module%4==3)continue;
- branch->GetEvent(module);
- Int_t nrecp1 = itsRec->GetEntries();
- for(Int_t j=0;j<nrecp1;j++){
- AliITSRecPoint *recp = (AliITSRecPoint*)itsRec->At(j);
- // Local coordinates of this recpoint
- lc[0]=recp->GetDetLocalX();
- lc[2]=recp->GetDetLocalZ();
- geom->LtoG(module,lc,gc);
- // Global coordinates of this recpoints
- gc[0]-=fX0; // Possible beam offset in the bending plane
- gc[1]-=fY0; // " "
- xc1[ind]=gc[0];
- yc1[ind]=gc[1];
- zc1[ind]=gc[2];
- // azimuthal angle is computed in the interval 0 --> 2*pi
- phi1[ind] = TMath::ATan2(gc[1],gc[0]);
- if(phi1[ind]<0)phi1[ind]=2*TMath::Pi()+phi1[ind];
- err1[ind]=recp->GetSigmaZ2();
- ind++;
- }
- detTypeRec.ResetRecPoints();
- }
- ind = 0; // the running index is reset for Layer 2
- for(Int_t module= fFirstL2; module<=fLastL2;module++){
- branch->GetEvent(module);
- Int_t nrecp2 = itsRec->GetEntries();
- for(Int_t j=0;j<nrecp2;j++){
- AliITSRecPoint *recp = (AliITSRecPoint*)itsRec->At(j);
- lc[0]=recp->GetDetLocalX();
- lc[2]=recp->GetDetLocalZ();
- geom->LtoG(module,lc,gc);
- gc[0]-=fX0;
- gc[1]-=fY0;
- xc2[ind]=gc[0];
- yc2[ind]=gc[1];
- zc2[ind]=gc[2];
- phi2[ind] = TMath::ATan2(gc[1],gc[0]);
- if(phi2[ind]<0)phi2[ind]=2*TMath::Pi()+phi2[ind];
- err2[ind]=recp->GetSigmaZ2();
- ind++;
- }
- detTypeRec.ResetRecPoints();
- }
-
-/* Test the ffect of mutiple scatternig on error. Negligible
+ /* Test the ffect of mutiple scatternig on error. Negligible
// Multiple scattering
Float_t beta=1.,pmed=0.875; //pmed=875 MeV (for tracks with dphi<0.01 rad)
Float_t beta2=beta*beta;
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);
*/
- TClonesArray *points = new TClonesArray("AliITSZPoint",nrpL1*nrpL2);
+ Int_t maxdim=TMath::Min(nrpL1*nrpL2,50000); // temporary; to limit the size in PbPb
+ TClonesArray *points = new TClonesArray("AliITSZPoint",maxdim);
TClonesArray &pts = *points;
Int_t nopoints =0;
- for(Int_t i=0;i<nrpL1;i++){ // loop on L1 RP
- Float_t r1=TMath::Sqrt(xc1[i]*xc1[i]+yc1[i]*yc1[i]); // radius L1 RP
- for(Int_t j=0;j<nrpL2;j++){ // loop on L2 RP
- Float_t diff = TMath::Abs(phi2[j]-phi1[i]); // diff in azimuth
- if(diff>TMath::Pi())diff=2.*TMath::Pi()-diff; //diff<pi
- if(diff<fDiffPhiMax){ // cut on 10 milliradians by def.
- Float_t r2=TMath::Sqrt(xc2[j]*xc2[j]+yc2[j]*yc2[j]); // radius L2 RP
-// Float_t tgth=(zc2[j]-zc1[i])/(r2-r1); // slope
- Float_t zr0=(r2*zc1[i]-r1*zc2[j])/(r2-r1); //Z @ null radius
- Float_t ezr0q=(r2*r2*err1[i]+r1*r1*err2[j])/(r2-r1)/(r2-r1); //error on Z @ null radius
- /*
+ for(Int_t modul1= fFirstL1; modul1<=fLastL1;modul1++){ // Loop on modules of layer 1
+ 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();
+ 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
+ */
+ recp->GetGlobalXYZ(gc1);
+ 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]);
+ 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();
+ 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);
+ branch->GetEvent(modul2);
+ Int_t nrecp2 = 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);
+ */
+ recp->GetGlobalXYZ(gc2);
+ gc2[0]-=fNominalPos[0];
+ gc2[1]-=fNominalPos[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();
+
+ Float_t diff = TMath::Abs(phi2-phi1);
+ if(diff>TMath::Pi())diff=2.*TMath::Pi()-diff;
+ if(diff<fDiffPhiMax){
+ // 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
*/
- new(pts[nopoints++])AliITSZPoint(zr0,ezr0q);
-
- fZCombc->Fill(zr0);
+ if(nopoints<maxdim) new(pts[nopoints++])AliITSZPoint(zr0,ezr0q);
+ fZCombc->Fill(zr0);
+ }
+ }
+ detTypeRec.ResetRecPoints();
+ }
}
}
+ delete prpl1;
}
- delete [] xc1;
- delete [] yc1;
- delete [] zc1;
- delete [] phi1;
- delete [] err1;
- delete [] xc2;
- delete [] yc2;
- delete [] zc2;
- delete [] phi2;
- delete [] err2;
points->Sort();
ResetHistograms();
itsLoader->UnloadRecPoints();
fCurrentVertex = new AliESDVertex(0.,5.3,-1);
+ points->Delete();
+ delete points;
return;
}
} while(niter<10 && TMath::Abs((zm-lim1)-(lim2-zm))>fTolerance);
fCurrentVertex = new AliESDVertex(zm,ezm,ncontr);
fCurrentVertex->SetTitle("vertexer: B");
+ delete points;
ResetHistograms();
itsLoader->UnloadRecPoints();
return;
}
+
+
//_____________________________________________________________________
void AliITSVertexerZ::ResetHistograms(){
// delete TH1 data members
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 <<" Debug flag: "<<fDebug<<endl;
cout <<"First event to be processed "<<fFirstEvent;
cout <<"\n Last event to be processed "<<fLastEvent<<endl;
if(fZCombc){
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff