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StV0I Class Referenceabstract

#include <StV0I.hh>

Inheritance diagram for StV0I:
StV0Mc StV0MuDst StXiI StXiMuDst StXiMc StXiMuDst

Public Member Functions

virtual void Clear ()
StStrangeEvMuDstevent ()
 Pointer to event information.
virtual void SetEvent (StStrangeEvMuDst *)
 Set pointer to event information.
Decay properties
virtual Float_t decayLengthV0 () const
 3-d decay distance
virtual Float_t decayVertexV0X () const =0
virtual Float_t decayVertexV0Y () const =0
virtual Float_t decayVertexV0Z () const =0
 Coordinates of decay vertex.
Float_t alphaV0 ()
Float_t ptArmV0 ()
 Armenteros-Podolanski variables.
Float_t cTauLambda ()
 Lifetime (ctau) assuming (anti)lambda.
Float_t cTauK0Short ()
 Lifetime (ctau) assuming k-short.
TVector3 momPos ()
 Momentum of pos. daughter.
virtual Float_t momPosX () const =0
virtual Float_t momPosY () const =0
virtual Float_t momPosZ () const =0
 Momentum components of pos. daughter.
TVector3 momNeg ()
 Momentum of neg. daughter.
virtual Float_t momNegX () const =0
virtual Float_t momNegY () const =0
virtual Float_t momNegZ () const =0
 Momentum components of neg. daughter.
TVector3 momV0 ()
 Momentum of V0.
virtual Float_t momV0X () const =0
virtual Float_t momV0Y () const =0
virtual Float_t momV0Z () const =0
 Momentum components of V0.
Float_t ptV0 ()
 Transverse momentum.
Float_t ptPos ()
 Transverse momentum of pos. daughter.
Float_t ptNeg ()
 Transverse momentum of neg. daughter.
Float_t ptotV0 ()
 Total momentum.
Float_t ptotPos ()
 Total momentum of pos. daughter.
Float_t ptotNeg ()
 Total momentum of neg. daughter.
Mass-dependent properties
Float_t eLambda ()
 Energy assuming lambda hypothesis.
Float_t eK0Short ()
 Energy assuming k-short hypothesis.
Float_t ePosProton ()
 Energy of pos. daughter assuming proton.
Float_t ePosPion ()
 Energy of pos. daughter assuming pion.
Float_t eNegProton ()
 Energy of neg. daughter assuming antiproton.
Float_t eNegPion ()
 Energy of neg. daughter assuming pion.
Float_t massLambda ()
 Mass assuming lambda hypothesis.
Float_t massAntiLambda ()
 Mass assuming antilambda hypothesis.
Float_t massK0Short ()
 Mass assuming k-short hypothesis.
Float_t rapLambda ()
 Rapidity assuming (anti)lambda.
Float_t rapK0Short ()
 Rapidity assuming k-short.
Mass-independent properties
Float_t thetaV0 ()
 Polar angle theta.
Float_t thetaPos ()
 Polar angle theta of pos. daughter.
Float_t thetaNeg ()
 Polar angle theta of neg. daughter.
Float_t pseudoRapV0 ()
Float_t pseudoRapPos ()
 Pseudorapidity of pos. daughter.
Float_t pseudoRapNeg ()
 Pseudorapidity of neg. daughter.
Transverse mass formulae
Float_t mtLambda ()
 Transverse mass assuming lambda.
Float_t mtK0Short ()
 Transverse mass assuming k-short.
Float_t mtm0Lambda ()
 mt-m0 assuming lambda
Float_t mtm0K0Short ()
 mt-m0 assuming k-short
Energy and invariant mass formulae for hypothetical masses
Float_t ePosHyp (Float_t mass)
 Energy of pos. daughter assuming its mass.
Float_t eNegHyp (Float_t mass)
 Energy of neg. daughter.
Float_t massHypV0 (Float_t massPos, Float_t massNeg)
Float_t eHypV0 (Float_t mass)
Float_t rapHypV0 (Float_t mass)
Float_t mtHypV0 (Float_t mass)
Float_t mtm0HypV0 (Float_t mass)
 Energy, rapidity, mt, mt-m0 of V0 assuming its mass.
Cosines of decay and polarization angles for different particle hypotheses
Float_t decayCosThetaK0Short ()
Float_t decayCosThetaLambda ()
Float_t decayCosThetaAntiLambda ()
Float_t polCosThetaLambda ()
Float_t polCosThetaAntiLambda ()
Float_t decayCosThetaPosLambda ()
Float_t decayCosThetaNegLambda ()
Float_t decayCosThetaPosAntiLambda ()
Float_t decayCosThetaNegAntiLambda ()
Float_t dCTV0 (Float_t m1, Float_t m2, StChargeSign charge)
 This helper function can be used for decayCosTheta of any hypothesis. More...
Momenta of daughters in V0 rest frame for different particle hypotheses
TVector3 momPosK0Short ()
TVector3 momNegK0Short ()
TVector3 momPosLambda ()
TVector3 momNegLambda ()
TVector3 momPosAntiLambda ()
TVector3 momNegAntiLambda ()
TVector3 momV0Frame (Float_t m1, Float_t m2, StChargeSign charge)
virtual Int_t decayMode () const
virtual Int_t geantIdParent () const
virtual Int_t geantIdPositive () const
virtual Int_t geantIdNegative () const
virtual Int_t positiveSimTpcHits () const
virtual Int_t positiveCommonTpcHits () const
virtual Int_t negativeSimTpcHits () const
virtual Int_t negativeCommonTpcHits () const
virtual Int_t keyPos () const
 Pos. daughter track key.
virtual Int_t keyNeg () const
 Neg. daughter track key.
virtual StTrackTopologyMaptopologyMapPos ()
 Pos. daughter track topology map.
virtual StTrackTopologyMaptopologyMapNeg ()
 Neg. daughter track topology map.
virtual Float_t dedxPos () const
 dE/dX of pos. daughter
virtual Float_t dedxNeg () const
 dE/dX of neg. daughter
virtual Float_t errDedxPos () const
 Error on mean of dE/dX of pos. daughter.
virtual Float_t errDedxNeg () const
 Error on mean of dE/dX of neg. daughter.
virtual UShort_t numDedxPos () const
 Number of dE/dX points for pos. daughter.
virtual UShort_t numDedxNeg () const
 Number of dE/dX points for neg. daughter.
virtual Float_t lenDedxPos () const
 Length of dE/dX track of pos. daughter.
virtual Float_t lenDedxNeg () const
 Length of dE/dX track of neg. daughter.
virtual Float_t dcaV0Daughters () const
 DCA of v0 daughters at decay vertex.
virtual Float_t dcaV0ToPrimVertex () const
 DCA of v0 to primary vertex.
virtual Float_t dcaPosToPrimVertex () const
 DCA of pos v0 daughter to pri vertex.
virtual Float_t dcaNegToPrimVertex () const
 DCA of neg v0 daughter to pri vertex.
Fit/Finding properties
virtual Float_t chi2V0 () const
 Chi square of V0.
virtual Float_t clV0 () const
 Confidence level of V0.
virtual Float_t chi2Pos () const
 Chi square of pos. daughter.
virtual Float_t clPos () const
 Confidence level of pos. daughter.
virtual Float_t chi2Neg () const
 Chi square of neg. daughter.
virtual Float_t clNeg () const
 Confidence level of neg. daughter.
virtual Long_t detectorIdV0 ()
 Detector ID for V0 Vertex.
virtual Long_t detectorIdPars ()
 Detector ID for pars used in V0 finder.
virtual void setPosBad ()
 Set the pos. daughter as bad.
virtual void setNegBad ()
 Set the neg. daughter as bad.
virtual Bool_t bad () const
 Test whether either daughter is bad.

Protected Member Functions

Float_t Ptot2Pos ()
Float_t Ptot2Neg ()
Float_t Ptot2V0 ()
Float_t Pt2V0 ()
Float_t MomPosAlongV0 ()
Float_t MomNegAlongV0 ()

Protected Attributes


Detailed Description

Gene Van Buren, BNL, 24-Apr-2001
          V0 micro dst object interface class
          Used for StV0MuDst (reconstructed), StV0Mc (Monte Carlo),
          and StXiI (which is used for StXiMuDst and StXiMc).

Definition at line 31 of file StV0I.hh.

Member Function Documentation

Float_t StV0I::dCTV0 ( Float_t  m1,
Float_t  m2,
StChargeSign  charge 

This helper function can be used for decayCosTheta of any hypothesis.

m1,m2 = parent,daughter mass; charge = positive/negative daughter

Definition at line 555 of file StV0I.hh.

References momNegZ(), momPosZ(), and momV0Z().

virtual Int_t StV0I::decayMode ( ) const

Returns the decay process for the vertex, where the decay modes are enumerated in decayModeType

Reimplemented in StXiMc, and StV0Mc.

Definition at line 199 of file StV0I.hh.

TVector3 StV0I::momV0Frame ( Float_t  m1,
Float_t  m2,
StChargeSign  charge 

This helper function can be used for the momentum of daughters in the V0 rest frame of any hypothesis m1,m2 = parent,daughter mass; charge = positive/negative daughter

Definition at line 587 of file StV0I.hh.

References momNegZ(), momPosZ(), and momV0Z().

The documentation for this class was generated from the following file: