X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=PHOS%2FAliPHOSTrackSegmentMakerv1.cxx;h=8135da99385ab17e2f28a6e325d46a99a9d25d6c;hb=0aaa8b91020aa133991fac648be9b7b6b42a0d04;hp=444f36629b9e452892fe48ee8a024d0e84d847eb;hpb=04236e6706a5b16e11ccf14c139bb4a995291429;p=u%2Fmrichter%2FAliRoot.git diff --git a/PHOS/AliPHOSTrackSegmentMakerv1.cxx b/PHOS/AliPHOSTrackSegmentMakerv1.cxx index 444f36629b9..8135da99385 100644 --- a/PHOS/AliPHOSTrackSegmentMakerv1.cxx +++ b/PHOS/AliPHOSTrackSegmentMakerv1.cxx @@ -112,6 +112,7 @@ // // --- ROOT system --- +#include "TVector3.h" #include "TTree.h" #include "TBenchmark.h" @@ -126,6 +127,16 @@ #include "AliESDtrack.h" #include "AliPHOSEmcRecPoint.h" #include "AliPHOSCpvRecPoint.h" +#include "AliLog.h" +#include "AliMagF.h" +#include "AliMagF.h" +#include "AliTracker.h" +#include "AliGeomManager.h" +#include "AliCluster.h" +#include "AliKalmanTrack.h" +#include "AliGlobalQADataMaker.h" +#include "AliVParticle.h" + ClassImp( AliPHOSTrackSegmentMakerv1) @@ -238,16 +249,164 @@ void AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * em Float_t &dx, Float_t &dz) const { // Calculates the distance between the EMC RecPoint and the CPV RecPoint + // If no CPV, calculates the distance between the EMC RecPoint and the track + // prolongation to the PHOS module plane. // Clusters are sorted in "rows" and "columns" of width 1 cm // Float_t delta = 1 ; // Width of the rows in sorting of RecPoints (in cm) // // if you change this value, change it as well in xxxRecPoint::Compare() - Float_t distance2Track = fRtpc ; - trackindex = -1 ; // closest track within fRCpv + if(!cpvClu) { + + trackindex = -1; + dx=999.; + dz=999.; + + if(!emcClu) { + return; + } + // *** Start the matching + Int_t nt=fESD->GetNumberOfTracks(); + Int_t iPHOSMod = emcClu->GetPHOSMod() ; + //Calculate actual distance to PHOS module + TVector3 globaPos ; + fGeom->Local2Global(iPHOSMod, 0.,0., globaPos) ; + const Double_t rPHOS = globaPos.Pt() ; //Distance to PHOS module + const Double_t kYmax = 72.+10. ; //Size of the module (with some reserve) in phi direction + const Double_t kZmax = 64.+10. ; //Size of the module (with some reserve) in z direction + const Double_t kAlpha= 20./180.*TMath::Pi() ; //TPC sector angular size + Double_t minDistance = 1.e6; + + TMatrixF gmat; + TVector3 gposRecPoint; // global (in ALICE frame) position of rec. point + emcClu->GetGlobalPosition(gposRecPoint,gmat); + Double_t gposTrack[3] ; + + Double_t bz = AliTracker::GetBz() ; //B-Field for approximate matching + Double_t b[3]; + for (Int_t i=0; iGetTrack(i); + +// // Skip the tracks having "wrong" status (has to be checked/tuned) +// ULong_t status = esdTrack->GetStatus(); +// if ((status & AliESDtrack::kTRDout) == 0) continue; +// if ((status & AliESDtrack::kTRDrefit) == 1) continue; + + AliExternalTrackParam t(*esdTrack); + Int_t isec=Int_t(t.GetAlpha()/kAlpha); + Int_t imod=-isec-2; // PHOS module + + Double_t y; // Some tracks do not reach the PHOS + if (!t.GetYAt(rPHOS,bz,y)) continue; // because of the bending + + Double_t z; t.GetZAt(rPHOS,bz,z); + if (TMath::Abs(z) > kZmax) continue; // Some tracks miss the PHOS in Z + + Bool_t ok=kTRUE; + while (TMath::Abs(y) > kYmax) { // Find the matching module + Double_t alp=t.GetAlpha(); + if (y > kYmax) { + if (!t.Rotate(alp+kAlpha)) {ok=kFALSE; break;} + imod--; + } else if (y < -kYmax) { + if (!t.Rotate(alp-kAlpha)) {ok=kFALSE; break;} + imod++; + } + if (!t.GetYAt(rPHOS,bz,y)) {ok=kFALSE; break;} + } + if (!ok) continue; // Track rotation failed + + + if(imod!= iPHOSMod-1) + continue; //not even approximate coincidence + + //t.CorrectForMaterial(...); // Correct for the TOF material, if needed + t.GetBxByBz(b) ; + t.PropagateToBxByBz(rPHOS,b); // Propagate to the matching module + t.GetXYZ(gposTrack) ; + + Double_t ddx = gposTrack[0] - gposRecPoint.X(), ddy = gposTrack[1] - gposRecPoint.Y(), ddz = gposTrack[2] - gposRecPoint.Z(); + Double_t d2 = ddx*ddx + ddy*ddy + ddz*ddz; + if(d2 < minDistance) { + dx = TMath::Sign(TMath::Sqrt(ddx*ddx + ddy*ddy),ddx) ; + dz = ddz ; + trackindex=i; + minDistance=d2 ; + } + } + return ; + } + + + TVector3 emcGlobal; + fGeom->GetGlobalPHOS((AliPHOSRecPoint*)emcClu,emcGlobal); + + // Radius from IP to current point + Double_t rEMC = TMath::Abs(emcGlobal.Pt()); + + // Extrapolate the global track direction to EMC + // and find the closest track + + Int_t nTracks = fESD->GetNumberOfTracks(); + + AliESDtrack *track; + Double_t xyz[] = {-1,-1,-1}; + Double_t pxyz[3]; + Double_t zEMC,xEMC; + Int_t module; + TVector3 vecP; + TVector3 locClu; + + Float_t minDistance = 1.e6; + Float_t dr; + + for (Int_t iTrack=0; iTrackGetTrack(iTrack); + if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)) continue; + + AliDebug(1,Form("Event %d, iTrack: %d, (%.3f,%.3f,%.3f)", + fESD->GetEventNumberInFile(),iTrack,xyz[0],xyz[1],xyz[2])); + + if (track->GetPxPyPzAt(rEMC,fESD->GetMagneticField(),pxyz)) { + + vecP.SetXYZ(pxyz[0],pxyz[1],pxyz[2]); + fGeom->ImpactOnEmc(xyz,vecP.Theta(),vecP.Phi(),module,zEMC,xEMC) ; + + if(!module) continue; + AliDebug(1,Form("\t\tTrack hit PHOS! Module: %d, (x,z)=(%.3f,%.3f)",module,xEMC,zEMC)); + + if(emcClu->GetPHOSMod() != module) continue; + + // match track to EMC cluster + emcClu->GetLocalPosition(locClu); + + Float_t delta_x = xEMC - locClu.X(); + Float_t delta_z = zEMC - locClu.Z(); + dr = TMath::Sqrt(delta_x*delta_x + delta_z*delta_z); + AliDebug(1,Form("\tMatch iTrack=%d: (dx,dz)=(%.3f,%.3f)",iTrack,delta_x,delta_z)); + + if(dr=0) + AliDebug(1,Form("\t\tBest match for (xClu,zClu,eClu)=(%.3f,%.3f,%.3f): iTrack=%d, dR=%.3f", + locClu.X(),locClu.Z(),emcClu->GetEnergy(), + trackindex,TMath::Sqrt(dx*dx+dz*dz))); + return; + + Float_t distance2Track = fRtpc ; + + trackindex = -1 ; // closest track within fRCpv + TVector3 vecEmc ; // Local position of EMC recpoint - TVector3 vecP ; // Momentum direction at CPV plain TVector3 vecPloc ; // Momentum direction at CPV plain //toofar = kTRUE ; @@ -256,9 +415,9 @@ void AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * em dz=999. ; return ; } - + emcClu->GetLocalPosition(vecEmc) ; - + Double_t xCPV,zCPV ; //EMC-projected coordinates of CPV cluster TVector3 cpvGlobal; // Global position of the CPV recpoint fGeom->GetGlobalPHOS((AliPHOSRecPoint*)cpvClu,cpvGlobal); @@ -266,40 +425,35 @@ void AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * em Int_t dummyMod ; if (fESD == 0x0) { - //if no track information available, assume straight line from IP to emcal - fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ; - dx=xCPV - vecEmc.X() ; - dz=zCPV - vecEmc.Z() ; - return ; + //if no track information available, assume straight line from IP to emcal + fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ; + dx=xCPV - vecEmc.X() ; + dz=zCPV - vecEmc.Z() ; + return ; } - + //if there is ESD try to correct distance using TPC information on particle direct in CPV if (fESD != 0x0) { Double_t rCPV = cpvGlobal.Pt() ;// Radius from IP to current point // Extrapolate the global track direction if any to CPV and find the closest track - Int_t nTracks = fESD->GetNumberOfTracks(); Int_t iClosestTrack = -1; - Double_t minDistance = 1.e6; TVector3 inPHOS ; - AliESDtrack *track; - Double_t xyz[3] ; - Double_t pxyz[3]; for (Int_t iTrack=0; iTrackGetTrack(iTrack); if (!track->GetXYZAt(rCPV, fESD->GetMagneticField(), xyz)) - continue; //track coord on the cylinder of PHOS radius + continue; //track coord on the cylinder of PHOS radius if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0) - continue; + continue; //Check if this track hits PHOS inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]); distance2Track = inPHOS.Angle(cpvGlobal) ; // Find the closest track to the CPV recpoint if (distance2Track < minDistance) { - minDistance = distance2Track; - iClosestTrack = iTrack; + minDistance = distance2Track; + iClosestTrack = iTrack; } } @@ -307,7 +461,6 @@ void AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * em track = fESD->GetTrack(iClosestTrack); if (track->GetPxPyPzAt(rCPV, fESD->GetMagneticField(), pxyz)) { // track momentum ibid. vecP.SetXYZ(pxyz[0],pxyz[1],pxyz[2]); - Int_t dummyMod ; fGeom->ImpactOnEmc(vtxCPV,vecP.Theta(),vecP.Phi(),dummyMod,zCPV,xCPV) ; } } @@ -446,11 +599,16 @@ void AliPHOSTrackSegmentMakerv1::MakePairs() Int_t iEmcRP ; for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){ if(emcExist[iEmcRP] > 0 ){ - new ((*fTrackSegments)[fNTrackSegments]) - AliPHOSTrackSegment(dynamic_cast(fEMCRecPoints->At(iEmcRP+fEmcFirst)), - nullpointer) ; - (dynamic_cast(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); - fNTrackSegments++; + Int_t track = -1 ; + Float_t dx,dz ; + AliPHOSEmcRecPoint *emcclu = dynamic_cast(fEMCRecPoints->At(iEmcRP+fEmcFirst)); + GetDistanceInPHOSPlane(emcclu, 0, track,dx,dz); + if(track<0) + new ((*fTrackSegments)[fNTrackSegments]) AliPHOSTrackSegment(emcclu,nullpointer) ; + else + new ((*fTrackSegments)[fNTrackSegments]) AliPHOSTrackSegment(emcclu,0,track,dx,dz); + (dynamic_cast(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments); + fNTrackSegments++; } } } @@ -482,7 +640,7 @@ void AliPHOSTrackSegmentMakerv1::Clusters2TrackSegments(Option_t *option) fTrackSegments->Clear(); // if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent - + for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) { FillOneModule() ; MakeLinks() ; @@ -535,3 +693,4 @@ void AliPHOSTrackSegmentMakerv1::PrintTrackSegments(Option_t * option) } } } +