//-------------------------------------------------------
-// Class for vertex determination with ESD tracks
+// Class for vertex determination with tracks
//
// Origin: AliITSVertexerTracks
// A.Dainese, Padova, andrea.dainese@pd.infn.it
/*****************************************************************************
* *
- * This class determines the vertex of a set of ESD tracks. *
+ * This class determines the vertex of a set of tracks. *
* Different algorithms are implemented, see data member fAlgo. *
* *
*****************************************************************************/
-#include "AliVertex.h"
-#include "AliTracker.h"
-
#include <TObjArray.h>
+#include <TMatrixD.h>
+
+#include "AliESDVertex.h"
+#include "AliExternalTrackParam.h"
+#include "AliLog.h"
-class TTree;
-class AliVertex;
-class AliESD;
+class AliVEvent;
+class AliESDEvent;
+class AliStrLine;
class AliVertexerTracks : public TObject {
public:
AliVertexerTracks();
- AliVertexerTracks(Double_t xStart, Double_t yStart);
+ AliVertexerTracks(Double_t fieldkG);
virtual ~AliVertexerTracks();
- // computes the vertex from the set of tracks in the tree
- AliVertex* VertexForSelectedTracks(TTree *trkTree);
- AliVertex* VertexForSelectedTracks(TObjArray *trkArray);
-
- void SetMinTracks(Int_t n=2) { fMinTracks = n; return; }
- void SetVtxStart(Double_t x=0,Double_t y=0)
- { fNominalPos[0]=x; fNominalPos[1]=y; return; }
- void SetDCAcut(Double_t maxdca)
- { fDCAcut=maxdca; return;}
- void SetFinderAlgorithm(Int_t opt=1)
- { fAlgo=opt; return;}
-
- protected:
- Double_t GetField() const { return AliTracker::GetBz();}
-
- Int_t PrepareTracks(TTree &trkTree);
- void VertexFinder(Int_t optUseWeights=0);
- void HelixVertexFinder();
- void StrLinVertexFinderMinDist(Int_t OptUseWeights=0);
- static void GetStrLinDerivMatrix(Double_t *p0,Double_t *p1,Double_t m[][3],Double_t *d);
- static void GetStrLinDerivMatrix(Double_t *p0,Double_t *p1,Double_t *sigmasq,Double_t m[][3],Double_t *d);
+ AliESDVertex* FindPrimaryVertex(AliVEvent *vEvent);
+ AliESDVertex* FindPrimaryVertex(TObjArray *trkArrayOrig,UShort_t *idOrig);
+ AliESDVertex* VertexForSelectedTracks(TObjArray *trkArray,UShort_t *id,
+ Bool_t optUseFitter=kTRUE,
+ Bool_t optPropagate=kTRUE);
+ AliESDVertex* VertexForSelectedESDTracks(TObjArray *trkArray,
+ Bool_t optUseFitter=kTRUE,
+ Bool_t optPropagate=kTRUE);
+ AliESDVertex* RemoveTracksFromVertex(AliESDVertex *inVtx,
+ TObjArray *trkArray,UShort_t *id,
+ Float_t *diamondxy) const;
+ AliESDVertex* RemoveConstraintFromVertex(AliESDVertex *inVtx,
+ Float_t *diamondxyz,
+ Float_t *diamondcov) const;
+ void SetITSMode(Double_t dcacut=0.1,
+ Double_t dcacutIter0=0.1,
+ Double_t maxd0z0=0.5,
+ Int_t minCls=5,
+ Int_t mintrks=1,
+ Double_t nsigma=3.,
+ Double_t mindetfitter=100.,
+ Double_t maxtgl=1000.,
+ Double_t fidR=3.,
+ Double_t fidZ=30.,
+ Int_t finderAlgo=1,
+ Int_t finderAlgoIter0=4);
+ void SetTPCMode(Double_t dcacut=0.1,
+ Double_t dcacutIter0=1.0,
+ Double_t maxd0z0=5.0,
+ Int_t minCls=10,
+ Int_t mintrks=1,
+ Double_t nsigma=3.,
+ Double_t mindetfitter=0.1,
+ Double_t maxtgl=1.5,
+ Double_t fidR=3.,
+ Double_t fidZ=30.,
+ Int_t finderAlgo=1,
+ Int_t finderAlgoIter0=4);
+ void SetCuts(Double_t *cuts);
+ void SetConstraintOff() { fConstraint=kFALSE; return; }
+ void SetConstraintOn() { fConstraint=kTRUE; return; }
+ void SetDCAcut(Double_t maxdca) { fDCAcut=maxdca; return; }
+ void SetDCAcutIter0(Double_t maxdca) { fDCAcutIter0=maxdca; return; }
+ void SetFinderAlgorithm(Int_t opt=1) { fAlgo=opt; return; }
+ void SetITSrefitRequired() { fITSrefit=kTRUE; return; }
+ Bool_t GetITSrefitRequired() const { return fITSrefit; }
+ void SetITSrefitNotRequired() { fITSrefit=kFALSE; return; }
+ void SetFiducialRZ(Double_t r=3,Double_t z=30) { fFiducialR=r; fFiducialZ=z; return; }
+ void SetMaxd0z0(Double_t maxd0z0=0.5) { fMaxd0z0=maxd0z0; return; }
+ void SetMinClusters(Int_t n=5) { fMinClusters=n; return; }
+ Int_t GetMinClusters() const { return fMinClusters; }
+ void SetMinTracks(Int_t n=1) { fMinTracks=n; return; }
+ void SetNSigmad0(Double_t n=3) { fNSigma=n; return; }
+ Double_t GetNSigmad0() const { return fNSigma; }
+ void SetMinDetFitter(Double_t mindet=100.) { fMinDetFitter=mindet; return; }
+ void SetMaxTgl(Double_t maxtgl=1.) { fMaxTgl=maxtgl; return; }
+ void SetOnlyFitter() { if(!fConstraint) AliFatal("Set constraint first!");
+ fOnlyFitter=kTRUE; return; }
+ void SetSkipTracks(Int_t n,Int_t *skipped);
+ void SetVtxStart(Double_t x=0,Double_t y=0,Double_t z=0)
+ { fNominalPos[0]=x; fNominalPos[1]=y; fNominalPos[2]=z; return; }
+ void SetVtxStartSigma(Double_t sx=3.,Double_t sy=3.,Double_t sz=15.)
+ { fNominalCov[0]=sx*sx; fNominalCov[2]=sy*sy; fNominalCov[5]=sz*sz;
+ fNominalCov[1]=0.; fNominalCov[3]=0.; fNominalCov[4]=0.; return; }
+ void SetVtxStart(AliESDVertex *vtx);
static Double_t GetStrLinMinDist(Double_t *p0,Double_t *p1,Double_t *x0);
static Double_t GetDeterminant3X3(Double_t matr[][3]);
+ static void GetStrLinDerivMatrix(Double_t *p0,Double_t *p1,Double_t (*m)[3],Double_t *d);
+ static void GetStrLinDerivMatrix(Double_t *p0,Double_t *p1,Double_t *sigmasq,Double_t (*m)[3],Double_t *d);
+ static AliESDVertex TrackletVertexFinder(TClonesArray *lines, Int_t optUseWeights=0);
+ static AliESDVertex TrackletVertexFinder(AliStrLine **lines, const Int_t knacc, Int_t optUseWeights=0);
+ void SetFieldkG(Double_t field=-999.) { fFieldkG=field; return; }
+ Double_t GetFieldkG() const {
+ if(fFieldkG<-99.) AliFatal("Field value not set");
+ return fFieldkG; }
+ void SetNSigmaForUi00(Double_t n=1.5) { fnSigmaForUi00=n; return; }
+ Double_t GetNSigmaForUi00() const { return fnSigmaForUi00; }
- AliVertex fVert; // vertex after vertex finder
- Double_t fNominalPos[2]; // initial knowledge on vertex position
+ protected:
+ void HelixVertexFinder();
+ void OneTrackVertFinder();
+ Int_t PrepareTracks(TObjArray &trkArrayOrig,UShort_t *idOrig,
+ Int_t optImpParCut);
+ Bool_t PropagateTrackTo(AliExternalTrackParam *track,
+ Double_t xToGo);
+ Bool_t TrackToPoint(AliExternalTrackParam *t,
+ TMatrixD &ri,TMatrixD &wWi,
+ Bool_t uUi3by3=kFALSE) const;
+ void VertexFinder(Int_t optUseWeights=0);
+ void VertexFitter();
+ void StrLinVertexFinderMinDist(Int_t optUseWeights=0);
+ void TooFewTracks();
+
+ AliESDVertex fVert; // vertex after vertex finder
+ AliESDVertex *fCurrentVertex; // ESD vertex after fitter
+ UShort_t fMode; // 0 ITS+TPC; 1 TPC
+ Double_t fFieldkG; // z component of field (kGauss)
+ Double_t fNominalPos[3]; // initial knowledge on vertex position
+ Double_t fNominalCov[6]; // initial knowledge on vertex position
+ TObjArray fTrkArraySel; // array with tracks to be processed
+ UShort_t *fIdSel; // IDs of the tracks (AliESDtrack::GetID())
+ Int_t *fTrksToSkip; // track IDs to be skipped for find and fit
+ Int_t fNTrksToSkip; // number of tracks to be skipped
+ Bool_t fConstraint; // true when "mean vertex" was set in
+ // fNominal ... and must be used in the fit
+ Bool_t fOnlyFitter; // primary with one fitter shot only
+ // (use only with beam constraint)
Int_t fMinTracks; // minimum number of tracks
- TObjArray fTrkArray; // array with tracks to be processed
+ Int_t fMinClusters; // minimum number of ITS or TPC clusters per track
Double_t fDCAcut; // maximum DCA between 2 tracks used for vertex
+ Double_t fDCAcutIter0; // maximum DCA between 2 tracks used for vertex
+ Double_t fNSigma; // number of sigmas for d0 cut in PrepareTracks()
+ Double_t fMaxd0z0; // value for sqrt(d0d0+z0z0) cut
+ // in PrepareTracks(1) if fConstraint=kFALSE
+ Double_t fMinDetFitter; // minimum determinant to try to invertex matrix
+ Double_t fMaxTgl; // maximum tgl of tracks
+ Bool_t fITSrefit; // if kTRUE (default), use only kITSrefit tracks
+ // if kFALSE, use all tracks (also TPC only)
+ Double_t fFiducialR; // radius of fiducial cylinder for tracks
+ Double_t fFiducialZ; // length of fiducial cylinder for tracks
+ Double_t fnSigmaForUi00; // n. sigmas from finder in TrackToPoint
Int_t fAlgo; // option for vertex finding algorythm
+ Int_t fAlgoIter0; // this is for iteration 0
// fAlgo=1 (default) finds minimum-distance point among all selected tracks
// approximated as straight lines
// and uses errors on track parameters as weights
// approximated as straight lines
- ClassDef(AliVertexerTracks,1) // 3D Vertexing with ESD tracks
+ private:
+ AliVertexerTracks(const AliVertexerTracks & source);
+ AliVertexerTracks & operator=(const AliVertexerTracks & source);
+
+ ClassDef(AliVertexerTracks,12) // 3D Vertexing with tracks
};
#endif
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff