LauSigmaRes Class Reference

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

#include <LauSigmaRes.hh>

Inheritance diagram for LauSigmaRes:

Public Member Functions
	LauSigmaRes (LauResonanceInfo *resInfo, const 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...
virtual void	floatResonanceParameter (const TString &name)
	Allow the various parameters to float in the fit. More...
virtual LauParameter *	getResonanceParameter (const TString &name)
	Access the given resonance parameter. More...
virtual const std::vector < LauParameter * > &	getFloatingParameters ()
	Retrieve the resonance parameters, e.g. so that they can be loaded into a fit. More...
Public Member Functions inherited from LauAbsResonance
	LauAbsResonance (LauResonanceInfo *resInfo, const Int_t resPairAmpInt, const LauDaughters *daughters)
	Constructor (for use by standard resonances) More...
	LauAbsResonance (const TString &resName, const Int_t resPairAmpInt, const LauDaughters *daughters)
	Constructor (for use by K-matrix components) More...
virtual	~LauAbsResonance ()
	Destructor. More...
virtual LauComplex	amplitude (const LauKinematics *kinematics)
	Calculate the complex amplitude. More...
LauSpinType	getSpinType () const
	Get the spin type. More...
const TString &	getResonanceName () const
	Get the name of the resonance. More...
const TString &	getSanitisedName () 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...
LauParameter *	getMassPar ()
	Get the mass parameter of the resonance. More...
LauParameter *	getWidthPar ()
	Get the width parameter of the resonance. More...
virtual Bool_t	preSymmetrised () const
	Is the amplitude pre-symmetrised? More...
Bool_t	flipHelicity () const
	Get the helicity flip flag. More...
void	flipHelicity (const Bool_t boolean)
	Set the helicity flip flag. More...
Bool_t	ignoreMomenta () const
	Get the ignore momenta flag. More...
void	ignoreMomenta (const Bool_t boolean)
	Set the ignore momenta flag. More...
Bool_t	ignoreSpin () const
	Get the ignore spin flag. More...
void	ignoreSpin (const Bool_t boolean)
	Set the ignore spin flag. More...
Bool_t	ignoreBarrierScaling () const
	Get the ignore barrier factor scaling flag. More...
void	ignoreBarrierScaling (const Bool_t boolean)
	Set the ignore barrier factor scaling 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...
void	changeBWBarrierRadii (const Double_t resRadius, const Double_t parRadius)
	Allow the Blatt-Weisskopf radius for the resonance and parent factors to be changed. More...
void	fixMass (const Bool_t parFixed)
	Fix or release the resonance mass. More...
void	fixWidth (const Bool_t parFixed)
	Fix or release the resonance width. More...
Bool_t	fixMass () const
	Get the status of resonance mass (fixed or released) More...
Bool_t	fixWidth () const
	Get the status of resonance width (fixed or released) More...
void	setSpinType (const LauSpinType spinType)
	Set the spin formalism to be used. More...
void	setBarrierRadii (LauBlattWeisskopfFactor *resFactor, LauBlattWeisskopfFactor *parFactor)
	Set the form factor model and parameters. More...
void	fixBarrierRadii (const Bool_t fixResRadius, const Bool_t fixParRadius)
	Fix or release the Blatt-Weisskopf barrier radii. More...
Bool_t	fixResRadius () const
	Get the status of resonance barrier radius (fixed or released) More...
Bool_t	fixParRadius () const
	Get the status of parent barrier radius (fixed or released) More...
Double_t	getResRadius () const
	Get the radius of the resonance barrier factor. More...
Double_t	getParRadius () const
	Get the radius of the parent barrier factor. More...

Protected Member Functions
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...
Bool_t	fixB1Value () const
	Fix the b1 parameter value. More...
Bool_t	fixB2Value () const
	Fix the b2 parameter value. More...
Bool_t	fixAValue () const
	Fix the A parameter value. More...
Bool_t	fixM0Value () const
	Fix 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	getCovFactor () const
	Get the current value of the full spin-dependent covariant factor. More...
LauBlattWeisskopfFactor *	getParBWFactor ()
	Get the centrifugal barrier for the parent decay. More...
const LauBlattWeisskopfFactor *	getParBWFactor () const
LauBlattWeisskopfFactor *	getResBWFactor ()
	Get the centrifugal barrier for the resonance decay. More...
const LauBlattWeisskopfFactor *	getResBWFactor () const
LauResonanceInfo *	getResInfo () const
	Access the resonance info object. More...
const LauDaughters *	getDaughters () const
	Access the daughters object. More...
Double_t	calcZemachSpinFactor (const Double_t pProd) const
	Calculate the amplitude spin term using the Zemach tensor formalism. More...
Double_t	calcCovSpinFactor (const Double_t pProd)
	Calculate the amplitude spin term using the covariant tensor formalism. More...
void	calcCovFactor (const Double_t erm)
	Calculate the spin-dependent covariant factor. More...
Double_t	calcLegendrePoly () const
	Calculate the Legendre polynomial for the spin factor. More...
Double_t	calcLegendrePoly (const Double_t cosHel)
	Calculate the Legendre polynomial for the spin factor (specifying the cosHel value) More...
void	clearFloatingParameters ()
	Clear list of floating parameters. More...
void	addFloatingParameter (LauParameter *param)
	Add parameter to the list of floating parameters. More...
std::vector< LauParameter * > &	getParameters ()
	Access the list of floating parameters. More...

Private Member Functions
	LauSigmaRes (const LauSigmaRes &rhs)
	Copy constructor (not implemented) More...
LauSigmaRes &	operator= (const LauSigmaRes &rhs)
	Copy assignment operator (not implemented) More...

Private Attributes
Double_t	mPiSq4_
	Defined as 4*mPi*mPi. More...
Double_t	sAdler_
	Defined as 0.5*mPi*mPi. More...
LauParameter *	b1_
	Factor from BES data. More...
LauParameter *	b2_
	Factor from BES data. More...
LauParameter *	a_
	Factor from BES data. More...
LauParameter *	m0_
	Factor from BES data. More...

Additional Inherited Members
Public Types inherited from LauAbsResonance
enum	LauResonanceModel {   BW, RelBW, GS, Flatte,   Sigma, Kappa, Dabba, LASS,   LASS_BW, LASS_NR, EFKLLM, KMatrix,   FlatNR, NRModel, BelleNR, PowerLawNR,   BelleSymNR, BelleSymNRNoInter, TaylorNR, PolNR,   MIPW_MagPhase, MIPW_RealImag, GaussIncoh, RhoOmegaMix_GS,   RhoOmegaMix_RBW, RhoOmegaMix_GS_1, RhoOmegaMix_RBW_1 }
	Define the allowed resonance types. More...
enum	LauSpinType { Zemach_P, Zemach_Pstar, Covariant, Legendre }
	Define the allowed spin formalisms. More...
Static Public Member Functions inherited from LauAbsResonance
static bool	isIncoherentModel (LauResonanceModel model)
	Is the resonance model incoherent? 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 45 of file LauSigmaRes.hh.

Constructor & Destructor Documentation

LauSigmaRes::LauSigmaRes	(	LauResonanceInfo *	resInfo,
		const Int_t	resPairAmpInt,
		const LauDaughters *	daughters
	)

Constructor.

Parameters

[in]	resInfo	the object containing information on the resonance name, mass, width, spin, charge, etc.
[in]	resPairAmpInt	the number of the daughter not produced by the resonance
[in]	daughters	the daughter particles

Definition at line 38 of file LauSigmaRes.cc.

LauSigmaRes::~LauSigmaRes ( )

virtual

Destructor.

Definition at line 96 of file LauSigmaRes.cc.

LauSigmaRes::LauSigmaRes ( const LauSigmaRes &  rhs )

private

Copy constructor (not implemented)

Member Function Documentation

void LauSigmaRes::checkDaughterTypes ( ) const

protected

Check that both daughters are the same type of particle.

Definition at line 112 of file LauSigmaRes.cc.

Bool_t LauSigmaRes::fixAValue ( ) const

inlineprotected

Fix the A parameter value.

Returns

kTRUE if the A parameter is fixed, kFALSE otherwise

Definition at line 159 of file LauSigmaRes.hh.

Bool_t LauSigmaRes::fixB1Value ( ) const

inlineprotected

Fix the b1 parameter value.

Returns

kTRUE if the b1 parameter is fixed, kFALSE otherwise

Definition at line 147 of file LauSigmaRes.hh.

Bool_t LauSigmaRes::fixB2Value ( ) const

inlineprotected

Fix the b2 parameter value.

Returns

kTRUE if the b2 parameter is fixed, kFALSE otherwise

Definition at line 153 of file LauSigmaRes.hh.

Bool_t LauSigmaRes::fixM0Value ( ) const

inlineprotected

Fix the m0 parameter value.

Returns

kTRUE if the m0 parameter is fixed, kFALSE otherwise

Definition at line 165 of file LauSigmaRes.hh.

void LauSigmaRes::floatResonanceParameter ( const TString &  name )

virtual

Allow the various parameters to float in the fit.

Parameters

[in]

name

the name of the parameter to be floated

Reimplemented from LauAbsResonance.

Definition at line 228 of file LauSigmaRes.cc.

Double_t LauSigmaRes::getAValue ( ) const

inlineprotected

Get the A parameter value.

Returns

value of the A parameter

Definition at line 135 of file LauSigmaRes.hh.

Double_t LauSigmaRes::getB1Value ( ) const

inlineprotected

Get the b1 parameter value.

Returns

value of the b1 parameter

Definition at line 123 of file LauSigmaRes.hh.

Double_t LauSigmaRes::getB2Value ( ) const

inlineprotected

Get the b2 parameter value.

Returns

value of the b2 parameter

Definition at line 129 of file LauSigmaRes.hh.

const std::vector< LauParameter * > & LauSigmaRes::getFloatingParameters ( )

virtual

Retrieve the resonance parameters, e.g. so that they can be loaded into a fit.

Returns

floating parameters of the resonance

Reimplemented from LauAbsResonance.

Definition at line 181 of file LauSigmaRes.cc.

Double_t LauSigmaRes::getM0Value ( ) const

inlineprotected

Get the m0 parameter value.

Returns

value of the m0 parameter

Definition at line 141 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 66 of file LauSigmaRes.hh.

LauParameter * LauSigmaRes::getResonanceParameter ( const TString &  name )

virtual

Access the given resonance parameter.

Parameters

[in]

name

the name of the parameter

Returns

the corresponding parameter

Reimplemented from LauAbsResonance.

Definition at line 263 of file LauSigmaRes.cc.

void LauSigmaRes::initialise ( )

virtual

Initialise the model.

Implements LauAbsResonance.

Definition at line 100 of file LauSigmaRes.cc.

LauSigmaRes& LauSigmaRes::operator= ( const LauSigmaRes &  rhs )

private

Copy assignment operator (not implemented)

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

protectedvirtual

Complex resonant ampltiude.

Parameters

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

Implements LauAbsResonance.

Definition at line 132 of file LauSigmaRes.cc.

void LauSigmaRes::setAValue ( const Double_t  A )

protected

Set the A parameter.

Parameters

[in]

A

new value for A parameter

Definition at line 293 of file LauSigmaRes.cc.

void LauSigmaRes::setB1Value ( const Double_t  b1 )

protected

Set the b1 parameter.

Parameters

[in]

b1

new value for b1 parameter

Definition at line 279 of file LauSigmaRes.cc.

void LauSigmaRes::setB2Value ( const Double_t  b2 )

protected

Set the b2 parameter.

Parameters

[in]

b2

new value for b2 parameter

Definition at line 286 of file LauSigmaRes.cc.

void LauSigmaRes::setM0Value ( const Double_t  m0 )

protected

Set the m0 parameter.

Parameters

[in]

m0

new value for m0 parameter

Definition at line 300 of file LauSigmaRes.cc.

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 204 of file LauSigmaRes.cc.

Member Data Documentation

LauParameter* LauSigmaRes::a_

private

Factor from BES data.

Definition at line 194 of file LauSigmaRes.hh.

LauParameter* LauSigmaRes::b1_

private

Factor from BES data.

Definition at line 190 of file LauSigmaRes.hh.

LauParameter* LauSigmaRes::b2_

private

Factor from BES data.

Definition at line 192 of file LauSigmaRes.hh.

LauParameter* LauSigmaRes::m0_

private

Factor from BES data.

Definition at line 196 of file LauSigmaRes.hh.

Double_t LauSigmaRes::mPiSq4_

private

Defined as 4*mPi*mPi.

Definition at line 185 of file LauSigmaRes.hh.

Double_t LauSigmaRes::sAdler_

private

Defined as 0.5*mPi*mPi.

Definition at line 187 of file LauSigmaRes.hh.

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

• inc/LauSigmaRes.hh
• src/LauSigmaRes.cc