LauRelBreitWignerRes Class Reference

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

#include <LauRelBreitWignerRes.hh>

Inheritance diagram for LauRelBreitWignerRes:

Public Member Functions
	LauRelBreitWignerRes (LauResonanceInfo *resInfo, const 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 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...
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...
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
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	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
	LauRelBreitWignerRes (const LauRelBreitWignerRes &rhs)
	Copy constructor (not implemented) More...
LauRelBreitWignerRes &	operator= (const LauRelBreitWignerRes &rhs)
	Copy assignment operator (not implemented) 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	erm0_
	Covariant factor (at pole mass) More...
Double_t	resMass_
	The resonance mass. More...
Double_t	resMassSq_
	Square of the resonance mass. More...
Double_t	resWidth_
	The resonance width. More...
Double_t	resRadius_
	The resonance barrier radius. More...
Double_t	parRadius_
	The parent barrier radius. 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	FP0_
	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, EFKLLM, KMatrix,   FlatNR, NRModel, BelleNR, PowerLawNR,   BelleSymNR, BelleSymNRNoInter, TaylorNR, PolNR,   Pole, PolarFFNR, PolarFFSymNR, PolarFFSymNRNoInter,   Rescattering, Rescattering2, RescatteringNoInter, 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 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 45 of file LauRelBreitWignerRes.hh.

Constructor & Destructor Documentation

LauRelBreitWignerRes::LauRelBreitWignerRes	(	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 37 of file LauRelBreitWignerRes.cc.

LauRelBreitWignerRes::~LauRelBreitWignerRes ( )

virtual

Destructor.

Definition at line 59 of file LauRelBreitWignerRes.cc.

LauRelBreitWignerRes::LauRelBreitWignerRes ( const LauRelBreitWignerRes &  rhs )

private

Copy constructor (not implemented)

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

const std::vector< LauParameter * > & LauRelBreitWignerRes::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 277 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 66 of file LauRelBreitWignerRes.hh.

void LauRelBreitWignerRes::initialise ( )

virtual

Initialise the model.

Implements LauAbsResonance.

Definition at line 63 of file LauRelBreitWignerRes.cc.

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

private

Copy assignment operator (not implemented)

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

protectedvirtual

Complex resonant amplitude.

Parameters

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

Implements LauAbsResonance.

Definition at line 164 of file LauRelBreitWignerRes.cc.

Member Data Documentation

Double_t LauRelBreitWignerRes::erm0_

private

Covariant factor (at pole mass)

Definition at line 104 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::FP0_

private

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

Definition at line 130 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::FR0_

private

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

Definition at line 128 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mBachSq_

private

Square of the bachelor mass.

Definition at line 126 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugDiff_

private

Difference of the two daughter masses.

Definition at line 120 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugDiffSq_

private

Square of the difference of the two daughter masses.

Definition at line 122 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugSum_

private

Sum of the two daughter masses.

Definition at line 116 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mDaugSumSq_

private

Square of the sum of the two daughter masses.

Definition at line 118 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::mParentSq_

private

Square of the parent mass.

Definition at line 124 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::p0_

private

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

Definition at line 100 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::parRadius_

private

The parent barrier radius.

Definition at line 114 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::pstar0_

private

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

Definition at line 102 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::q0_

private

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

Definition at line 98 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::resMass_

private

The resonance mass.

Definition at line 106 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::resMassSq_

private

Square of the resonance mass.

Definition at line 108 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::resRadius_

private

The resonance barrier radius.

Definition at line 112 of file LauRelBreitWignerRes.hh.

Double_t LauRelBreitWignerRes::resWidth_

private

The resonance width.

Definition at line 110 of file LauRelBreitWignerRes.hh.

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

• inc/LauRelBreitWignerRes.hh
• src/LauRelBreitWignerRes.cc