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AliRoot » PWGDQ » DIELECTRON » AliDielectronPair

class AliDielectronPair: public AliVParticle


Dielectron Pair class. Internally it makes use of AliKFParticle.

Function Members (Methods)

public:

	AliDielectronPair()
	AliDielectronPair(const AliDielectronPair&)
	AliDielectronPair(AliVTrack const particle1, Int_t pid1, AliVTrack const particle2, Int_t pid2, Char_t type)
	AliDielectronPair(const AliKFParticle const particle1, const AliKFParticle const particle2, AliVTrack const refParticle1, AliVTrack const refParticle2, Char_t type)
virtual	~AliDielectronPair()
void	TObject::AbstractMethod(const char* method) const
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
virtual Short_t	Charge() const
static TClass*	Class()
virtual const char*	TObject::ClassName() const
virtual void	TObject::Clear(Option_t* = "")
virtual TObject*	TObject::Clone(const char* newname = "") const
virtual Int_t	AliVParticle::Compare(const TObject* obj) const
virtual void	TObject::Copy(TObject& object) const
virtual void	TObject::Delete(Option_t* option = "")MENU
Double_t	DeltaEta() const
Double_t	DeltaPhi() const
Double_t	DeviationDaughters() const
Double_t	DeviationDaughtersXY() const
Double_t	DistanceDaughters() const
Double_t	DistanceDaughtersXY() const
virtual Int_t	TObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual void	TObject::Draw(Option_t* option = "")
virtual void	TObject::DrawClass() constMENU
virtual TObject*	TObject::DrawClone(Option_t* option = "") constMENU
virtual void	TObject::Dump() constMENU
virtual Double_t	E() const
virtual void	TObject::Error(const char* method, const char* msgfmt) const
virtual Double_t	Eta() const
virtual void	TObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual void	TObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual void	TObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual void	TObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*	TObject::FindObject(const char* name) const
virtual TObject*	TObject::FindObject(const TObject* obj) const
Double_t	GetArmAlpha() const
Double_t	GetArmPt() const
Double_t	GetCosPointingAngle(const AliVVertex* primVtx) const
void	GetDCA(const AliVVertex* primVtx, Double_t* d0z0) const
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
virtual Int_t	AliVParticle::GetFirstDaughter() const
AliVParticle*	GetFirstDaughterP() const
virtual Short_t	AliVParticle::GetGeneratorIndex() const
virtual const char*	TObject::GetIconName() const
Double_t	GetKFChi2() const
const AliKFParticle&	GetKFFirstDaughter() const
Int_t	GetKFNdf() const
const AliKFParticle&	GetKFParticle() const
const AliKFParticle&	GetKFSecondDaughter() const
Bool_t	GetKFUsage() const
virtual Int_t	GetLabel() const
virtual Int_t	AliVParticle::GetLastDaughter() const
virtual Int_t	AliVParticle::GetMother() const
virtual const char*	TObject::GetName() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
Double_t	GetPairPlaneAngle(Double_t kv0CrpH2, Int_t VariNum) const
AliVParticle*	GetSecondDaughterP() const
void	GetThetaPhiCM(Double_t& thetaHE, Double_t& phiHE, Double_t& thetaCS, Double_t& phiCS) const
virtual const char*	TObject::GetTitle() const
UChar_t	GetType() const
virtual UInt_t	TObject::GetUniqueID() const
Bool_t	AliVParticle::Global2LocalMomentum(Double_t* p, Short_t charge, Double_t& alpha) const
Bool_t	AliVParticle::Global2LocalPosition(Double_t* r, Double_t alpha) const
virtual Bool_t	TObject::HandleTimer(TTimer* timer)
virtual ULong_t	TObject::Hash() const
virtual void	TObject::Info(const char* method, const char* msgfmt) const
virtual Bool_t	TObject::InheritsFrom(const char* classname) const
virtual Bool_t	TObject::InheritsFrom(const TClass* cl) const
virtual void	TObject::Inspect() constMENU
void	TObject::InvertBit(UInt_t f)
virtual TClass*	IsA() const
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	AliVParticle::IsSortable() const
Bool_t	TObject::IsZombie() const
Bool_t	AliVParticle::Local2GlobalMomentum(Double_t* p, Double_t alpha) const
Bool_t	AliVParticle::Local2GlobalPosition(Double_t* r, Double_t alpha) const
virtual void	TObject::ls(Option_t* option = "") const
virtual Double_t	M() const
void	TObject::MayNotUse(const char* method) const
virtual Bool_t	TObject::Notify()
void	TObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
virtual Double_t	OneOverPt() const
Double_t	OpeningAngle() const
static void	TObject::operator delete(void* ptr)
static void	TObject::operator delete(void* ptr, void* vp)
static void	TObject::operator delete[](void* ptr)
static void	TObject::operator delete[](void* ptr, void* vp)
void*	TObject::operator new(size_t sz)
void*	TObject::operator new(size_t sz, void* vp)
void*	TObject::operator new[](size_t sz)
void*	TObject::operator new[](size_t sz, void* vp)
AliDielectronPair&	operator=(const AliDielectronPair&)
virtual Double_t	P() const
virtual void	TObject::Paint(Option_t* option = "")
Double_t	PairPlaneMagInnerProduct(Double_t ZDCrpH1) const
virtual Int_t	PdgCode() const
virtual Double_t	Phi() const
Double_t	PhivPair(Double_t MagField) const
virtual const Double_t*	PID() const
virtual void	TObject::Pop()
virtual void	TObject::Print(Option_t* option = "") const
Double_t	PsiPair(Double_t MagField) const
virtual Double_t	Pt() const
virtual Double_t	Px() const
virtual Bool_t	PxPyPz(Double_t* p) const
virtual Double_t	Py() const
virtual Double_t	Pz() const
virtual Int_t	TObject::Read(const char* name)
virtual void	TObject::RecursiveRemove(TObject* obj)
void	TObject::ResetBit(UInt_t f)
virtual void	TObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual void	TObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
static void	SetBeamEnergy(AliVEvent* ev, Double_t beamEbyHand = -1.)
void	TObject::SetBit(UInt_t f)
void	TObject::SetBit(UInt_t f, Bool_t set)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
void	SetGammaTracks(AliVTrack const particle1, Int_t pid1, AliVTrack const particle2, Int_t pid2)
virtual void	AliVParticle::SetGeneratorIndex(Short_t)
void	SetKFUsage(Bool_t KFUsage)
void	SetLabel(Int_t label)
static void	TObject::SetObjectStat(Bool_t stat)
void	SetPdgCode(Int_t pdgCode)
void	SetProductionVertex(const AliKFParticle& Vtx)
void	SetRefFirstDaughter(AliVParticle *const track)
void	SetRefSecondDaughter(AliVParticle *const track)
void	SetTracks(AliVTrack const particle1, Int_t pid1, AliVTrack const particle2, Int_t pid2)
void	SetTracks(const AliKFParticle const particle1, const AliKFParticle const particle2, AliVTrack const refParticle1, AliVTrack const refParticle2)
void	SetType(Char_t type)
virtual void	TObject::SetUniqueID(UInt_t uid)
virtual void	ShowMembers(TMemberInspector&)
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
virtual void	TObject::SysError(const char* method, const char* msgfmt) const
Bool_t	TObject::TestBit(UInt_t f) const
Int_t	TObject::TestBits(UInt_t f) const
virtual Double_t	Theta() const
Double_t	ThetaPhiCM(Bool_t isHE, Bool_t isTheta) const
static Double_t	ThetaPhiCM(const AliVParticle* d1, const AliVParticle* d2, Bool_t isHE, Bool_t isTheta)
virtual void	TObject::UseCurrentStyle()
virtual void	TObject::Warning(const char* method, const char* msgfmt) const
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const
virtual Double_t	Xv() const
virtual Bool_t	XvYvZv(Double_t* x) const
virtual Double_t	Y() const
virtual Double_t	Yv() const
virtual Double_t	Zv() const

protected:

virtual void	TObject::DoError(int level, const char* location, const char* fmt, va_list va) const
void	TObject::MakeZombie()

Data Members

public:

enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

private:

static Double_t	fBeamEnergy	!beam energy
AliKFParticle	fD1	KF particle first daughter
AliKFParticle	fD2	KF particle1 second daughter
Bool_t	fKFUsage	Use KF for vertexing
Int_t	fLabel	MC label
AliKFParticle	fPair	KF particle internally used for pair calculation
Int_t	fPdgCode	pdg code in case it is a MC particle
TRef	fRefD1	Reference to first daughter
TRef	fRefD2	Reference to second daughter
Char_t	fType	type of the pair e.g. like sign SE, unlike sign SE, ... see AliDielectron

Class Charts

Inheritance Chart:

TObject

←

AliVParticle

←

AliDielectronPair

Function documentation

AliDielectronPair()

 Default Constructor

AliDielectronPair(AliVTrack *const particle1, Int_t pid1, AliVTrack *const particle2, Int_t pid2, Char_t type)

 Constructor with tracks

AliDielectronPair(const AliKFParticle *const particle1, const AliKFParticle *const particle2, AliVTrack *const refParticle1, AliVTrack *const refParticle2, Char_t type)

 Constructor with tracks

~AliDielectronPair()

 Default Destructor

void SetTracks(AliVTrack *const particle1, Int_t pid1, AliVTrack *const particle2, Int_t pid2)

 Sort particles by pt, first particle larget Pt
 set AliKF daughters and pair
 refParticle1 and 2 are the original tracks. In the case of track rotation
 they are needed in the framework

void SetGammaTracks(AliVTrack *const particle1, Int_t pid1, AliVTrack *const particle2, Int_t pid2)

 Sort particles by pt, first particle larget Pt
 set AliKF daughters and a GAMMA pair
 refParticle1 and 2 are the original tracks. In the case of track rotation
 they are needed in the framework

void SetTracks(const AliKFParticle *const particle1, const AliKFParticle *const particle2, AliVTrack *const refParticle1, AliVTrack *const refParticle2)

 Sort particles by pt, first particle larget Pt
 set AliKF daughters and pair
 refParticle1 and 2 are the original tracks. In the case of track rotation
 they are needed in the framework

void GetThetaPhiCM(Double_t& thetaHE, Double_t& phiHE, Double_t& thetaCS, Double_t& phiCS) const

 Calculate theta and phi in helicity and Collins-Soper coordinate frame

Double_t PsiPair(Double_t MagField) const

Following idea to use opening of colinear pairs in magnetic field from e.g. PHENIX
to ID conversions. Adapted from AliTRDv0Info class

Double_t ThetaPhiCM(const AliVParticle* d1, const AliVParticle* d2, Bool_t isHE, Bool_t isTheta)

 The function calculates theta and phi in the mother rest frame with
 respect to the helicity coordinate system and Collins-Soper coordinate system
 TO DO: generalize for different decays (only J/Psi->e+e- now)

Double_t ThetaPhiCM(Bool_t isHE, Bool_t isTheta) const

 The function calculates theta and phi in the mother rest frame with
 respect to the helicity coordinate system and Collins-Soper coordinate system
 TO DO: generalize for different decays (only J/Psi->e+e- now)

Double_t GetCosPointingAngle(const AliVVertex* primVtx) const

 Calculate the poiting angle of the pair to the primary vertex and take the cosine

Double_t GetArmAlpha() const

 Calculate the Armenteros-Podolanski Alpha

Double_t GetArmPt() const

 Calculate the Armenteros-Podolanski Pt

void GetDCA(const AliVVertex* primVtx, Double_t* d0z0) const

 Calculate the dca of the mother with respect to the primary vertex

Double_t PhivPair(Double_t MagField) const

Following idea to use opening of colinear pairs in magnetic field from e.g. PHENIX
to ID conversions. Angle between ee plane and magnetic field is calculated.

Double_t GetPairPlaneAngle(Double_t kv0CrpH2, Int_t VariNum) const

Double_t PairPlaneMagInnerProduct(Double_t ZDCrpH1) const

void SetBeamEnergy(AliVEvent* ev, Double_t beamEbyHand = -1.)

 set the beam energy (by hand in case of AODs)

AliDielectronPair()

Double_t Px() const

AliVParticle interface
 kinematics

{ return fPair.GetPx(); }

Double_t Py() const

{ return fPair.GetPy(); }

Double_t Pz() const

{ return fPair.GetPz(); }

Double_t Pt() const

{ return fPair.GetPt(); }

Double_t P() const

{ return fPair.GetP(); }

Bool_t PxPyPz(Double_t* p) const

{ p[0]=Px(); p[1]=Py(); p[2]=Pz(); return kTRUE; }

Double_t Xv() const

{ return fPair.GetX(); }

Double_t Yv() const

{ return fPair.GetY(); }

Double_t Zv() const

{ return fPair.GetZ(); }

Bool_t XvYvZv(Double_t* x) const

{ x[0]=Xv(); x[1]=Yv(); x[2]=Zv(); return kTRUE; }

Double_t OneOverPt() const

{ return Pt()>0.?1./Pt():0.; }

Double_t Phi() const

{ return fPair.GetPhi();}

Double_t Theta() const

{ return Pz()!=0?TMath::ATan(Pt()/Pz()):0.; }

Double_t E() const

{ return fPair.GetE(); }

Double_t M() const

{ return fPair.GetMass(); }

Double_t Eta() const

{ return fPair.GetEta();}

Double_t Y() const

Short_t Charge() const

{ return fPair.GetQ();}

Int_t GetLabel() const

PID

{ return fLabel; }

const Double_t * PID() const

{ return 0;}

UChar_t GetType() const

 Double_t GetLXY(const AliVVertex * const vtx) const;
 Double_t GetPseudoProperTime(const AliVVertex * const vtx) const;

{ return fType; }

void SetType(Char_t type)

{ fType=type; }

void SetLabel(Int_t label)

 MC information

{fLabel=label;}

void SetPdgCode(Int_t pdgCode)

{ fPdgCode=pdgCode; }

Int_t PdgCode() const

{return fPdgCode;}

void SetProductionVertex(const AliKFParticle& Vtx)

{ fPair.SetProductionVertex(Vtx); }

Double_t GetKFChi2() const

inter leg information

{ return fPair.GetChi2(); }

Int_t GetKFNdf() const

{ return fPair.GetNDF(); }

Double_t OpeningAngle() const

{ return fD1.GetAngle(fD2); }

Double_t DistanceDaughters() const

{ return fD1.GetDistanceFromParticle(fD2); }

Double_t DistanceDaughtersXY() const

{ return fD1.GetDistanceFromParticleXY(fD2); }

Double_t DeviationDaughters() const

{ return fD1.GetDeviationFromParticle(fD2); }

Double_t DeviationDaughtersXY() const

{ return fD1.GetDeviationFromParticleXY(fD2); }

Double_t DeltaEta() const

   Double_t DeltaPhi()             const { Double_t dphi=TMath::Abs(fD1.GetPhi()-fD2.GetPhi());
                                           return (dphi>TMath::Pi())?dphi-TMath::Pi():dphi;      }

{ return TMath::Abs(fD1.GetEta()-fD2.GetEta()); }

Double_t DeltaPhi() const

{ return fD1.GetAngleXY(fD2); }

const AliKFParticle& GetKFParticle() const