ComPWA::Physics::Dynamics Namespace Reference

Namespaces
	Flatte
	RelativisticBreitWigner
	Voigtian

Classes
class	BlattWeisskopfFormFactor
	Blatt-Weisskopf form factors with normalization F(x=mR) = 1. More...
class	BreitWignerStrategy
class	Coupling
class	CrystalBarrelFormFactor
	Form factor for a0(980) used by Crystal Barrel (Phys.Rev.D78-074023) More...
class	FlatteStrategy
class	FormFactor
	Defines interface for form factors It should be noted that when exchanging various form factor implementations in the code, no correctness of the mathematical description is guaranteed. More...
class	FormFactorStrategy
struct	InputInfo
class	NoFormFactor
class	VoigtianStrategy

Functions
std::complex< double >	couplingToWidth (double mR, double g, std::complex< double > gamma, std::complex< double > phspFactor)
	Convert width to complex coupling. More...
std::complex< double >	widthToCoupling (double mR, double width, std::complex< double > gamma, std::complex< double > phspFactor)
	Convert width to complex coupling. More...
std::shared_ptr< ComPWA::FunctionTree::TreeNode >	createFunctionTree (std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>> InvMassSquaredDaughter1, std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>> InvMassSquaredDaughter2, std::shared_ptr< ComPWA::FunctionTree::FitParameter > MesonRadius, unsigned int L, std::shared_ptr< FormFactor > FormFactorFunctor, std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>> InvMassSquared)
double	qSquared (double S, double sqrtSA, double sqrtSB)
	Calculate Break-up momentum squared. More...
double	phspFactor (double sqrtS, double ma, double mb)
std::complex< double >	phspFactorAC (double sqrtS, double ma, double mb)
	Two body phsp factor. More...
std::complex< double >	qValueAC (double sqrtS, double ma, double mb)
	Calculate Break-up momentum. More...

Function Documentation

couplingToWidth()

std::complex<double> ComPWA::Physics::Dynamics::couplingToWidth ( double  mR, double  g, std::complex< double >  gamma, std::complex< double >  phspFactor  )

inline

Convert width to complex coupling.

This is the implementation of PDG2014, Chapter 47.2, Eq. 47.21 (inverted).

Definition at line 18 of file Coupling.hpp.

createFunctionTree()

std::shared_ptr< ComPWA::FunctionTree::TreeNode > ComPWA::Physics::Dynamics::createFunctionTree	(	std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>>	InvMassSquaredDaughter1,
		std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>>	InvMassSquaredDaughter2,
		std::shared_ptr< ComPWA::FunctionTree::FitParameter >	MesonRadius,
		unsigned int	L,
		std::shared_ptr< FormFactor >	FormFactorFunctor,
		std::shared_ptr< ComPWA::FunctionTree::Value< std::vector< double >>>	InvMassSquared
	)

Definition at line 17 of file FormFactor.cpp.

phspFactor()

double ComPWA::Physics::Dynamics::phspFactor ( double  sqrtS, double  ma, double  mb  )

inline

Definition at line 32 of file FormFactor.hpp.

phspFactorAC()

std::complex<double> ComPWA::Physics::Dynamics::phspFactorAC ( double  sqrtS, double  ma, double  mb  )

inline

Two body phsp factor.

From PDG2014 Eqn.47-2

Parameters

sqrtS	invariant mass of particles A and B
ma	Mass of particle A
mb	Mass of particle B

Definition at line 42 of file FormFactor.hpp.

qSquared()

double ComPWA::Physics::Dynamics::qSquared ( double  S, double  sqrtSA, double  sqrtSB  )

inline

Calculate Break-up momentum squared.

At energy S for particles with masses sqrtSA and sqrtSB. From PDG2014 Eq.46-20a.

Parameters

S	squared invariant mass of decaying system
sqrtSA	invariant mass of decay product A
sqrtSB	invariant mass of decay product B

Definition at line 24 of file FormFactor.hpp.

qValueAC()

std::complex<double> ComPWA::Physics::Dynamics::qValueAC ( double  sqrtS, double  ma, double  mb  )

inline

Calculate Break-up momentum.

At energy sqrtS for particles with masses ma and mb. From PDG2014 Eq.46-20a. Below threshold the function is analytically continued.

Parameters

sqrtS	center-of-mass energy
ma	mass particle A
mb	mass particle B

Definition at line 95 of file FormFactor.hpp.

widthToCoupling()

std::complex<double> ComPWA::Physics::Dynamics::widthToCoupling ( double  mR, double  width, std::complex< double >  gamma, std::complex< double >  phspFactor  )

inline

Convert width to complex coupling.

The form factor formFactorR, the normalized vertex function gamma (both evaluated at the resonance pole) and the phspFactor (evaluated at sqrt(s)) can be passed in order to save computation time. This is the implementation of PDG2014, Chapter 47.2, Eq. 47.21. See also widthToCoupling(double mSq, double mR, double width, double ma, double mb, double spin, double mesonRadius, formFactorType type)

Definition at line 43 of file Coupling.hpp.