StV0I Class Reference

#include <StV0I.hh>

Inheritance diagram for StV0I:

List of all members.

Public Member Functions
_________________FUNCTIONS_USEFUL_IN_ALL_V0_TYPES_________________
virtual void	Clear ()
StStrangeEvMuDst *	event ()
	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.
Momenta
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 ()
	Pseudorapidity.
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.
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)
_______________FUNCTIONS_PRESENTLY_USED_ONLY_BY_MC_______________
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
______________FUNCTIONS_PRESENTLY_USED_ONLY_BY_MuDst______________
virtual Int_t	keyPos () const
	Pos. daughter track key.
virtual Int_t	keyNeg () const
	Neg. daughter track key.
virtual StTrackTopologyMap &	topologyMapPos ()
	Pos. daughter track topology map.
virtual StTrackTopologyMap &	topologyMapNeg ()
	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.
DCAs
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
StStrangeEvMuDst *	mEvent

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Detailed Description

Author:

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.

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Member Function Documentation

Float_t StV0I::dCTV0	(	Float_t	m1,
		Float_t	m2,
		StChargeSign	charge
	)			[inline]

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 [inline, virtual]

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

Reimplemented in StV0Mc, and StXiMc.

Definition at line 199 of file StV0I.hh.

TVector3 StV0I::momV0Frame	(	Float_t	m1,
		Float_t	m2,
		StChargeSign	charge
	)			[inline]

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().

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

• StStrangeMuDstMaker/StV0I.hh