class AliTRDpidUtil: public TObject


Helper class for TRD PID efficiency calculation.
Calculation of the hadron efficiency dependent on momentum and of
the errors implemented in function CalculatePionEff. The pion
efficiency is based on a predefined electron efficiency.
The default is 90%. To change the, one has to call the function
SetElectronEfficiency.
Other Helper functions decide based on 90% electron efficiency
whether a certain track is accepted as Electron Track.
The reference data is stored in the TRD OCDB.

Function Members (Methods)

public:

	AliTRDpidUtil()
virtual	~AliTRDpidUtil()
void	TObject::AbstractMethod(const char* method) const
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
Bool_t	CalculatePionEffi(TH1* histo1, TH1* histo2)
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	TObject::Compare(const TObject* obj) const
virtual void	TObject::Copy(TObject& object) const
virtual void	TObject::Delete(Option_t* option = "")MENU
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
static Float_t	ElectronEfficiency()
virtual void	TObject::Error(const char* method, const char* msgfmt) 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	GetCalcElectronEfficiency() const
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
Double_t	GetError() const
virtual const char*	TObject::GetIconName() const
static Int_t	GetMomentumBin(Double_t p)
virtual const char*	TObject::GetName() const
static Int_t	GetNdEdxSlices(AliTRDpidUtil::ETRDPIDMethod m)
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
Double_t	GetPionEfficiency() const
static Double_t	GetSystematicError(const AliESDtrack* track, AliTRDpidUtil::ETRDPIDMethod method = kNN)
Double_t	GetThreshold() const
virtual const char*	TObject::GetTitle() const
virtual UInt_t	TObject::GetUniqueID() 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
static Bool_t	IsElectron(const AliESDtrack* track, AliTRDpidUtil::ETRDPIDMethod method = kNN)
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	TObject::IsSortable() const
Bool_t	TObject::IsZombie() const
virtual void	TObject::ls(Option_t* option = "") const
static Int_t	Mass2Pid(Float_t m)
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
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)
virtual void	TObject::Paint(Option_t* option = "")
static Int_t	Pdg2Pid(Int_t pdg)
virtual void	TObject::Pop()
virtual void	TObject::Print(Option_t* option = "") 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 = "")
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)
static void	SetElectronEfficiency(Float_t eleeffi)
static void	TObject::SetObjectStat(Bool_t stat)
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 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

protected:

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

private:

	AliTRDpidUtil(const AliTRDpidUtil&)
AliTRDpidUtil&	operator=(const AliTRDpidUtil&)

Data Members

public:

enum {	kBins
};
enum ETRDPIDMethod {	kLQ
	kNN
	kESD
};
enum {	kNNslices
	kLQslices
};
enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

private:

Double_t	fCalcEleEffi	electron efficiency after calculation
Double_t	fError	pion efficiency error
Double_t	fPionEffi	pion efficiency
Double_t	fThreshold	threshold for calculated electron efficiency
static Float_t	fgEleEffi	electron efficiency

Class Charts

Inheritance Chart:

TObject

←

AliTRDpidUtil

Function documentation

AliTRDpidUtil()

 Default constructor

Bool_t CalculatePionEffi(TH1* histo1, TH1* histo2)

 Double_t  AliTRDpidUtil::GetError()

 Calculates the pion efficiency

Int_t GetMomentumBin(Double_t p)

 returns the momentum bin for a given momentum

Bool_t IsElectron(const AliESDtrack* track, AliTRDpidUtil::ETRDPIDMethod method = kNN)

 Do PID decision for the TRD based on 90% Electron efficiency threshold

 Author: Markus Fasel (M.Fasel@gsi.de)

Double_t GetSystematicError(const AliESDtrack* track, AliTRDpidUtil::ETRDPIDMethod method = kNN)

 Returns the pion efficiency at 90% electron efficiency from the OCDB

 Author: Markus Fasel (M.Fasel@gsi.de)

Int_t Pdg2Pid(Int_t pdg)

 Private Helper function to get the paticle species (ALICE notation)
 from the Pdg code

Int_t Mass2Pid(Float_t m)

 Private Helper function to get the paticle species (ALICE notation)
 from the Pdg mass

AliTRDpidUtil()

virtual ~AliTRDpidUtil()

{;}

Float_t ElectronEfficiency()

{ return fgEleEffi;}

Int_t GetNdEdxSlices(AliTRDpidUtil::ETRDPIDMethod m)

{ return m == kNN ? kNNslices : kLQslices;}

Double_t GetCalcElectronEfficiency() const

{ return fCalcEleEffi;}

Double_t GetPionEfficiency() const

{ return fPionEffi;}

Double_t GetError() const

{ return fError;}

Double_t GetThreshold() const

{ return fThreshold;}

void SetElectronEfficiency(Float_t eleeffi)

{fgEleEffi = eleeffi;}

AliTRDpidUtil& operator=(const AliTRDpidUtil& )