Class for defining the relativistic Breit-Wigner resonance model. More...

#include <LauRelBreitWignerRes.hh>

Inheritance diagram for LauRelBreitWignerRes:

Public Member Functions
	LauRelBreitWignerRes (TString resName, Double_t resMass, Double_t resWidth, Int_t resSpin, Int_t resCharge, Int_t resPairAmpInt, const LauDaughters *daughters)
	Constructor. More...

virtual	~LauRelBreitWignerRes ()
	Destructor. More...

virtual void	initialise ()
	Initialise the model. More...

virtual LauAbsResonance::LauResonanceModel	getResonanceModel () const
	Get the resonance model type. More...

virtual void	setBarrierRadii (const Double_t resRadius, const Double_t parRadius, const LauAbsResonance::BarrierType type)
	Set the form factor model and parameters. More...

Public Member Functions inherited from LauAbsResonance
	LauAbsResonance (const TString &resName, Double_t resMass, Double_t resWidth, Int_t resSpin, Int_t resCharge, Int_t resPairAmpInt, const LauDaughters *daughters)
	Constructor. More...

virtual	~LauAbsResonance ()
	Destructor. More...

virtual LauComplex	amplitude (const LauKinematics *kinematics)
	Calculate the complex amplitude. More...

const TString &	getResonanceName () const
	Get the name of the resonance. More...

Int_t	getPairInt () const
	Get the integer to identify which DP axis the resonance belongs to. More...

Int_t	getSpin () const
	Get the spin of the resonance. More...

Int_t	getCharge () const
	Get the charge of the resonance. More...

Double_t	getMass () const
	Get the mass of the resonance. More...

Double_t	getWidth () const
	Get the width of the resonance. More...

Bool_t	flipHelicity () const
	Get the helicity flip flag. More...

void	flipHelicity (Bool_t boolean)
	Set the helicity flip flag. More...

Bool_t	ignoreMomenta () const
	Get the ignore momenta flag. More...

void	ignoreMomenta (Bool_t boolean)
	Set the ignore p_ and q_ flag. More...

void	changeResonance (const Double_t newMass, const Double_t newWidth, const Int_t newSpin)
	Allow the mass, width and spin of the resonance to be changed. More...

virtual void	setResonanceParameter (const TString &name, const Double_t value)
	Set value of the various parameters. More...

Protected Member Functions
virtual LauComplex	resAmp (Double_t mass, Double_t spinTerm)
	Complex resonant amplitude. More...

Double_t	calcFFactor (Double_t z)
	Calculate the form factor for the resonance. More...

Protected Member Functions inherited from LauAbsResonance
TString	getNameParent () const
	Get the name of the parent particle. More...

TString	getNameDaug1 () const
	Get the name of the first daughter of the resonance. More...

TString	getNameDaug2 () const
	Get the name of the second daughter of the resonance. More...

TString	getNameBachelor () const
	Get the name of the daughter that does not originate form the resonance. More...

Double_t	getMassParent () const
	Get the parent particle mass. More...

Double_t	getMassDaug1 () const
	Get the mass of daughter 1. More...

Double_t	getMassDaug2 () const
	Get the mass of daughter 2. More...

Double_t	getMassBachelor () const
	Get the mass of the bachelor daughter. More...

Int_t	getChargeParent () const
	Get the Charge of the parent particle. More...

Int_t	getChargeDaug1 () const
	Get the charge of daughter 1. More...

Int_t	getChargeDaug2 () const
	Get the charge of daughter 2. More...

Int_t	getChargeBachelor () const
	Get the charge of the bachelor daughter. More...

Double_t	getQ () const
	Get the current value of the daughter momentum in the resonance rest frame. More...

Double_t	getP () const
	Get the current value of the bachelor momentum in the resonance rest frame. More...

Double_t	getPstar () const
	Get the current value of the bachelor momentum in the parent rest frame. More...

Double_t	getParBWRadius () const
	Get the radius of the centrifugal barrier for the parent decay. More...

Double_t	getResBWRadius () const
	Get the radius of the centrifugal barrier for the resonance decay. More...

BarrierType	getBarrierType () const
	Get the form factor model. More...

const LauDaughters *	getDaughters () const
	Access the daughters object. More...

Private Attributes
Double_t	q0_
	Momentum of the daughters in the resonance rest frame (at pole mass) More...

Double_t	p0_
	Momentum of the bachelor in the resonance rest frame (at pole mass) More...

Double_t	pstar0_
	Momentum of the bachelor in the parent rest frame (at pole mass) More...

Double_t	resMassSq_
	Square of the resonance mass. More...

Double_t	mDaugSum_
	Sum of the two daughter masses. More...

Double_t	mDaugSumSq_
	Square of the sum of the two daughter masses. More...

Double_t	mDaugDiff_
	Difference of the two daughter masses. More...

Double_t	mDaugDiffSq_
	Square of the difference of the two daughter masses. More...

Double_t	mParentSq_
	Square of the parent mass. More...

Double_t	mBachSq_
	Square of the bachelor mass. More...

Double_t	FR0_
	Value of the form factor for resonance decay (at pole mass) More...

Double_t	FB0_
	Value of the form factor for parent decay (at pole mass) More...

Additional Inherited Members
Public Types inherited from LauAbsResonance
enum	LauResonanceModel { BW, RelBW, GS, Flatte, Sigma, Kappa, Dabba, LASS, LASS_BW, LASS_NR, KMatrix, FlatNR, NRModel, BelleNR, PowerLawNR, BelleSymNR, TaylorNR, PolNR }
	Define the allowed resonance types. More...

enum	BarrierType { BWBarrier, BWPrimeBarrier, ExpBarrier }
	Define the allowed types of barrier factors. More...

Detailed Description

Class for defining the relativistic Breit-Wigner resonance model.

Class for defining the relativistic Breit-Wigner resonance model, which includes the use of Blatt-Weisskopf barrier factors.

Definition at line 31 of file LauRelBreitWignerRes.hh.

Constructor & Destructor Documentation

LauRelBreitWignerRes::LauRelBreitWignerRes	(	TString	resName,
		Double_t	resMass,
		Double_t	resWidth,
		Int_t	resSpin,
		Int_t	resCharge,
		Int_t	resPairAmpInt,
		const LauDaughters *	daughters
	)

Constructor.

Parameters

[in]	resName	the name of the resonance
[in]	resMass	the mass of the resonance
[in]	resWidth	the width of the resonance
[in]	resSpin	the spin of the resonance
[in]	resCharge	the charge of the resonance
[in]	resPairAmpInt	the number of the daughter not produced by the resonance
[in]	daughters	the daughter particles

Definition at line 23 of file LauRelBreitWignerRes.cc.

LauRelBreitWignerRes::~LauRelBreitWignerRes ( )

virtual

Destructor.

Definition at line 41 of file LauRelBreitWignerRes.cc.

Member Function Documentation

Double_t LauRelBreitWignerRes::calcFFactor ( Double_t z )

protected

Calculate the form factor for the resonance.

Parameters

[in] z particle momentum multipled by the barrier radius

Returns: value of the form factor

Definition at line 139 of file LauRelBreitWignerRes.cc.

virtual LauAbsResonance::LauResonanceModel LauRelBreitWignerRes::getResonanceModel ( ) const

inlinevirtual

Get the resonance model type.

Returns: the resonance model type

Implements LauAbsResonance.

Definition at line 58 of file LauRelBreitWignerRes.hh.

void LauRelBreitWignerRes::initialise ( )

virtual

Initialise the model.

Implements LauAbsResonance.

Definition at line 45 of file LauRelBreitWignerRes.cc.

LauComplex LauRelBreitWignerRes::resAmp	(	Double_t	mass,
		Double_t	spinTerm
	)

protectedvirtual

Complex resonant amplitude.

Parameters

[in]	mass	appropriate invariant mass for the resonance
[in]	spinTerm	Zemach spin term

Implements LauAbsResonance.

Definition at line 194 of file LauRelBreitWignerRes.cc.

void LauRelBreitWignerRes::setBarrierRadii	(	const Double_t	resRadius,
		const Double_t	parRadius,
		const LauAbsResonance::BarrierType	type
	)

virtual

Set the form factor model and parameters.

Parameters

[in]	resRadius	the radius of the barrier for the resonance decay
[in]	parRadius	the radius of the barrier for the parent decay
[in]	type	the form-factor model

Reimplemented from LauAbsResonance.

Definition at line 120 of file LauRelBreitWignerRes.cc.

Member Data Documentation

Double_t LauRelBreitWignerRes::FB0_

private

Value of the form factor for parent decay (at pole mass)

Definition at line 109 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::FR0_

private

Value of the form factor for resonance decay (at pole mass)

Definition at line 107 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mBachSq_

private

Square of the bachelor mass.

Definition at line 104 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugDiff_

private

Difference of the two daughter masses.

Definition at line 98 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugDiffSq_

private

Square of the difference of the two daughter masses.

Definition at line 100 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugSum_

private

Sum of the two daughter masses.

Definition at line 94 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugSumSq_

private

Square of the sum of the two daughter masses.

Definition at line 96 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mParentSq_

private

Square of the parent mass.

Definition at line 102 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::p0_

private

Momentum of the bachelor in the resonance rest frame (at pole mass)

Definition at line 88 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::pstar0_

private

Momentum of the bachelor in the parent rest frame (at pole mass)

Definition at line 90 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::q0_

private

Momentum of the daughters in the resonance rest frame (at pole mass)

Definition at line 86 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::resMassSq_

private

Square of the resonance mass.

Definition at line 92 of file LauRelBreitWignerRes.hh.

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

inc/LauRelBreitWignerRes.hh
src/LauRelBreitWignerRes.cc

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation