KK molecules with momentum-dependent interactions
- School of Physics, University of the Witwatersrand, Johannesburg, Private Bag 3, WITS 2050 (South Africa)
It is shown that the momentum-dependent kaon-antikaon interactions generated via vector-meson exchange from the standard SU{sub V}(3)xSU{sub A}(3) interaction Lagrangian lead to a nonlocal potential in coordinate space that can be incorporated without approximation into a nonrelativistic version of the Bethe-Salpeter wave equation containing a radial-dependent effective kaon mass appearing in a fully symmetrized kinetic energy operator, in addition to a local potential. Estimates of the mass and decay widths of f{sub 0}(980) and a{sub 0}(980), considered as KK molecules of isospin 0 and 1, as well as for K{sup +}K{sup -} atomic bound states (kaonium) are presented and compared with previous studies of a similar nature. It is argued that without a better knowledge of hadronic form factors it is not possible to distinguish between the molecular versus elementary particle models for the structure of the light scalar mesons.
- OSTI ID:
- 21293978
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevC.80.045205; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
A0-980 MESONS
APPROXIMATIONS
BETHE-SALPETER EQUATION
BOUND STATE
F0-980 MESONS
FORM FACTORS
INTERACTIONS
ISOSPIN
KAONIUM
KAONS MINUS
KAONS PLUS
KINETIC ENERGY
LAGRANGIAN FUNCTION
MOLECULES
NONLOCAL POTENTIAL
SCALAR MESONS
SU GROUPS
VECTOR MESONS
WAVE EQUATIONS