**************************************************************************/
//
//-------------------------------------------------------
-// Implementation of the TPC combined trackfit
+// Implementation of the TPC cosmic trackfit
//
// Origin: Xianguo Lu lu@physi.uni-heidelberg.de Xianguo.Lu@cern.ch
//
//===========================================================================================
//
// Interface/Implementation:
-// This class provide the functionality to combined two ESD tracks and perform the trackfit using all related track points.
+// This class provide the functionality to combine two ESD tracks and perform the trackfit using all related track points.
// Input: AliESDtrack's (or AliTPCseed's, expert use)
// Output: the trackparams from the combined fit are stored as data member of this class, and they can be accessed via getter or copy.
//
//===========================================================================================
// Usage
/*
- fCombinedTrackfit = new AliTPCCosmicTrackfit(debuglevel, "anystring");
+ fCosmicTrackfit = new AliTPCCosmicTrackfit(debuglevel, "anystring");
//order not important; will be internally ordered (potinters modified due to &) such that track0 is the upper one
//kfit = kTRUE: good fit, kFALSE: bad fit
- const Bool_t kfit = fCombinedTrackfit->CombineESDtracks(esdtrack0, esdtrack1);
+ const Bool_t kfit = fCosmicTrackfit->CombineESDtracks(esdtrack0, esdtrack1);
//status = 0 for good fit (i.e. kfit=kTRUE), non-0 for bad fit (i.e. kfit=kFALSE), see "enum CombineStatus" definition in header file
- const Int_t status = fCombinedTrackfit->GetStatus();
+ const Int_t status = fCosmicTrackfit->GetStatus();
*/
//===========================================================================================
// Efficiency
// for 2011 Feb. cosmic data nch=2 events, the kfit and status look like:
/*
kfit,status ( 0, 1): 16337 / 443901 = 3.680% //kFailGetTPCseeds
-kfit,status ( 0, 2): 3692 / 443901 = 0.832% //not both tracks have ncl > AliTPCCosmicUtils::fgkNclsMin
+kfit,status ( 0, 2): 3692 / 443901 = 0.832% //not both tracks have ncl > AliTPCCosmicUtils::NclsMin()
kfit,status ( 0, 3): 6527 / 443901 = 1.470% //clusters in two tracks should be clearly separated in y, i.e. lowest cluster of upper track higher than highest cluster of lower track; otherwise fail
-kfit,status ( 0, 4): 7033 / 443901 = 1.584% //fLeverArm<fgkCutLeverArm
+kfit,status ( 0, 4): 7033 / 443901 = 1.584% //fLeverArm<CutLeverArm()
kfit,status ( 0, 6): 4398 / 443901 = 0.991% //fail in propagation of at least one cluster
-kfit,status ( 0, 7): 508 / 443901 = 0.114% //chi2/nfit > fgkMaxChi2
+kfit,status ( 0, 7): 508 / 443901 = 0.114% //chi2/nfit > MaxChi2()
kfit,status ( 0, 8): 52 / 443901 = 0.012% //fail in geting impact parameters
kfit,status ( 1, 0): 405354 / 443901 = 91.316% //i.e. 91% of nch=2 events are successfully fitted.
*/
fStreamer(0x0), fDebugLevel(dlev)
, fSeedUp(0x0), fSeedLow(0x0), fTrackparUp(0x0), fTrackparLow(0x0), fIniTrackparUp(0x0), fIniTrackparLow(0x0)
, fStatus(-999)
+ , fKswap(0)
+ , fInnerClusterUp(-999,-999,-999)
+ , fInnerClusterLow(-999,-999,-999)
, fLeverArm(-999)
, fFitNcls(-999), fMissNcls(-999), fPreChi2(-999), fFitLeverArm(-999), fImpactD(-999), fImpactZ(-999)
+ , fRowStartShift(-999)
+ , fRowStep(-999)
+ , fXMin(-999)
+ , fXMax(-999)
{
//
//Constructor
//
- fInnerClusterUp.SetXYZ(-999,-999,-999);
- fInnerClusterLow.SetXYZ(-999,-999,-999);
if(fDebugLevel>0)
- fStreamer = new TTreeSRedirector(Form("CombinedTrackfit_%s.root", tag.Data()));
+ fStreamer = new TTreeSRedirector(Form("CosmicTrackfit_%s.root", tag.Data()));
SetRow(0,1);
SetX(-1e10, 1e10);
printf("Status %2d NclsU %3d NclsD %3d ZinnerU %7.2f ZinnerD %7.2f LeverArm %7.2f\n", fStatus, fSeedUp->GetNumberOfClusters(), fSeedLow->GetNumberOfClusters(), fInnerClusterUp.Z(), fInnerClusterLow.Z(), fLeverArm);
}
-/*
-Double_t AliTPCCosmicTrackfit::ImpactParameter2D() const
+TVector3 AliTPCCosmicTrackfit::ImpactParameter2D() const
{
//
//calculate the 2D-impactparameter from (0,0)
const TVector3 l1(fInnerClusterUp.X(), fInnerClusterUp.Y(), 0);
const TVector3 l2(fInnerClusterLow.X(), fInnerClusterLow.Y(), 0);
- return AliTPCCosmicUtils::Point2LineDist(p0, l1, l2);
+ TVector3 vtx;
+ AliTPCCosmicUtils::Point2LineDist(p0, l1, l2, &vtx);
+ return vtx;
}
-Double_t AliTPCCosmicTrackfit::ImpactParameter3D() const
+TVector3 AliTPCCosmicTrackfit::ImpactParameter3D() const
{
//
//calculate the 3D-impactparameter from (0,0,0)
const TVector3 l1(fInnerClusterUp);
const TVector3 l2(fInnerClusterLow);
- return AliTPCCosmicUtils::Point2LineDist(p0, l1, l2);
+ TVector3 vtx;
+ AliTPCCosmicUtils::Point2LineDist(p0, l1, l2, &vtx);
+
+ //==========================
+ /*
+ printf("testing... \n");
+ TVector3 tmpv = ImpactParameter2D();
+ if(fabs(tmpv.Mag()-vtx.Pt())>1e-6){
+ printf("strange!!! %e %e %e\n", tmpv.Mag(), vtx.Pt(), fabs(tmpv.Mag()-vtx.Pt()));
+ vtx.Print();
+ tmpv.Print();
+ fInnerClusterUp.Print();
+ fInnerClusterLow.Print();
+ }
+ */
+ //==========================
+ return vtx;
}
-*/
Double_t AliTPCCosmicTrackfit::MinPhi() const
{
}
fPreChi2 /= fFitNcls;
- if(fPreChi2>fgkMaxChi2){
+ if(fPreChi2>MaxChi2()){
fStatus = kFailChi2;
return;
}
//On the other hand, short lever arm from two tracks mostly means they are fake pairs.
//lever arm extents over one quadrant, e.g. (0,250)-(250,0): 250*sqrt(2)~350
//
- if(fLeverArm<fgkCutLeverArm){
+ if(fLeverArm<CutLeverArm()){
fStatus = kFailLeverArm;
return kFALSE;
}
}
for(Int_t itrk=0; itrk<2; itrk++){
- for(Int_t irow=0; irow<AliTPCCosmicUtils::fgkNRow; irow++){
+ for(Int_t irow=0; irow<AliTPCCosmicUtils::NRow(); irow++){
const AliTPCclusterMI * cls = (*seeds[itrk])->GetClusterPointer(irow);
if(!cls)
continue;
//
//check number of clusters in TPCseed, for too small number MakeSeed will fail
//
- if( fSeedUp->GetNumberOfClusters()<AliTPCCosmicUtils::fgkNclsMin || fSeedLow->GetNumberOfClusters()<AliTPCCosmicUtils::fgkNclsMin ){
+ if( fSeedUp->GetNumberOfClusters()<AliTPCCosmicUtils::NclsMin() || fSeedLow->GetNumberOfClusters()<AliTPCCosmicUtils::NclsMin() ){
fStatus = kFailNclsMin;
return kFALSE;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff