Class for defining the Sigma resonance model. More...

#include <LauSigmaRes.hh>

Inheritance diagram for LauSigmaRes:

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

virtual	~LauSigmaRes ()
	Destructor. More...

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

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

virtual void	setResonanceParameter (const TString &name, const Double_t value)
	Set value of the various 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	setBarrierRadii (const Double_t resRadius, const Double_t parRadius, const BarrierType type)
	Set the form factor model and parameters. More...

Protected Member Functions
void	setConstants (Double_t b1, Double_t b2, Double_t A, Double_t m0)
	Set the parameter values. More...

void	setB1Value (const Double_t b1)
	Set the b1 parameter. More...

void	setB2Value (const Double_t b2)
	Set the b2 parameter. More...

void	setAValue (const Double_t A)
	Set the A parameter. More...

void	setM0Value (const Double_t m0)
	Set the m0 parameter. More...

Double_t	getB1Value () const
	Get the b1 parameter value. More...

Double_t	getB2Value () const
	Get the b2 parameter value. More...

Double_t	getAValue () const
	Get the A parameter value. More...

Double_t	getM0Value () const
	Get the m0 parameter value. More...

virtual LauComplex	resAmp (Double_t mass, Double_t spinTerm)
	Complex resonant ampltiude. More...

void	checkDaughterTypes () const
	Check that both daughters are the same type of particle. 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	mPiSq4_
	Defined as 4mPimPi. More...

Double_t	sAdler_
	Defined as 0.5mPimPi. More...

Double_t	b1_
	Factor from BES data. More...

Double_t	b2_
	Factor from BES data. More...

Double_t	A_
	Factor from BES data. More...

Double_t	m0_
	Factor from BES data. More...

Double_t	m0Sq_
	Defined as m0 squared. More...

Double_t	denom_
	Defined as m0Sq - sAdler. 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 Sigma resonance model.

Class for defining the Sigma resonance model. Formulae and data values from Phys.Lett.B 572, 1 (2003) - author D.V.Bugg

Definition at line 31 of file LauSigmaRes.hh.

Constructor & Destructor Documentation

LauSigmaRes::LauSigmaRes	(	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 LauSigmaRes.cc.

LauSigmaRes::~LauSigmaRes ( )

virtual

Destructor.

Definition at line 48 of file LauSigmaRes.cc.

Member Function Documentation

void LauSigmaRes::checkDaughterTypes ( ) const

protected

Check that both daughters are the same type of particle.

Definition at line 71 of file LauSigmaRes.cc.

Double_t LauSigmaRes::getAValue ( ) const

inlineprotected

Get the A parameter value.

Returns: value of the A parameter

Definition at line 117 of file LauSigmaRes.hh.

Double_t LauSigmaRes::getB1Value ( ) const

inlineprotected

Get the b1 parameter value.

Returns: value of the b1 parameter

Definition at line 105 of file LauSigmaRes.hh.

Double_t LauSigmaRes::getB2Value ( ) const

inlineprotected

Get the b2 parameter value.

Returns: value of the b2 parameter

Definition at line 111 of file LauSigmaRes.hh.

Double_t LauSigmaRes::getM0Value ( ) const

inlineprotected

Get the m0 parameter value.

Returns: value of the m0 parameter

Definition at line 123 of file LauSigmaRes.hh.

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

inlinevirtual

Get the resonance model type.

Returns: the resonance model type

Implements LauAbsResonance.

Definition at line 58 of file LauSigmaRes.hh.

void LauSigmaRes::initialise ( )

virtual

Initialise the model.

Implements LauAbsResonance.

Definition at line 52 of file LauSigmaRes.cc.

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

protectedvirtual

Complex resonant ampltiude.

Parameters

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

Implements LauAbsResonance.

Definition at line 91 of file LauSigmaRes.cc.

void LauSigmaRes::setAValue ( const Double_t A )

inlineprotected

Set the A parameter.

Parameters

[in] A new value for A parameter

Definition at line 93 of file LauSigmaRes.hh.

void LauSigmaRes::setB1Value ( const Double_t b1 )

inlineprotected

Set the b1 parameter.

Parameters

[in] b1 new value for b1 parameter

Definition at line 81 of file LauSigmaRes.hh.

void LauSigmaRes::setB2Value ( const Double_t b2 )

inlineprotected

Set the b2 parameter.

Parameters

[in] b2 new value for b2 parameter

Definition at line 87 of file LauSigmaRes.hh.

void LauSigmaRes::setConstants	(	Double_t	b1,
		Double_t	b2,
		Double_t	A,
		Double_t	m0
	)

protected

Set the parameter values.

Parameters

[in]	b1	factor from BES data
[in]	b2	factor from BES data
[in]	A	factor from BES data
[in]	m0	factor from BES data

Definition at line 62 of file LauSigmaRes.cc.

void LauSigmaRes::setM0Value ( const Double_t m0 )

inlineprotected

Set the m0 parameter.

Parameters

[in] m0 new value for m0 parameter

Definition at line 99 of file LauSigmaRes.hh.

void LauSigmaRes::setResonanceParameter	(	const TString &	name,
		const Double_t	value
	)

virtual

Set value of the various parameters.

Parameters

[in]	name	the name of the parameter to be changed
[in]	value	the new parameter value

Reimplemented from LauAbsResonance.

Definition at line 132 of file LauSigmaRes.cc.

Member Data Documentation

Double_t LauSigmaRes::A_

private

Factor from BES data.

Definition at line 145 of file LauSigmaRes.hh.

Double_t LauSigmaRes::b1_

private

Factor from BES data.

Definition at line 141 of file LauSigmaRes.hh.

Double_t LauSigmaRes::b2_

private

Factor from BES data.

Definition at line 143 of file LauSigmaRes.hh.

Double_t LauSigmaRes::denom_

private

Defined as m0Sq - sAdler.

Definition at line 151 of file LauSigmaRes.hh.

Double_t LauSigmaRes::m0_

private

Factor from BES data.

Definition at line 147 of file LauSigmaRes.hh.

Double_t LauSigmaRes::m0Sq_

private

Defined as m0 squared.

Definition at line 149 of file LauSigmaRes.hh.

Double_t LauSigmaRes::mPiSq4_

private

Defined as 4*mPi*mPi.

Definition at line 137 of file LauSigmaRes.hh.

Double_t LauSigmaRes::sAdler_

private

Defined as 0.5*mPi*mPi.

Definition at line 139 of file LauSigmaRes.hh.

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

inc/LauSigmaRes.hh
src/LauSigmaRes.cc

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation