Kobayashi-Kondo-Maskawa-'t Hooft interaction in pentaquarks
- Vinca Institute of Nuclear Services, P.O. Box 522, 11001 Belgrade (Serbia and Montenegro)
We review critically the predictions of pentaquarks in the quark model, in particular, those based on the flavor-spin-dependent (Glozman-Riska) hyperfine interaction and the color-spin (one-gluon-exchange Fermi-Breit) one. We include the antiquark interactions and find that: (1) the exotic SU(3) multiplets are not substantially affected in the flavor-spin model, whereas some of the nonexotic multiplets are; and (2) the variational upper bound on the {xi}{sup --}-{theta}{sup +} mass difference in the color-spin hyperfine interaction model is substantially reduced. This leads us to the U{sub A}(1) symmetry breaking Kobayashi-Kondo-Maskawa-'tHooft interaction. We discuss some of its phenomenological consequences for pentaquarks.
- OSTI ID:
- 20709362
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 71, Issue 9; Other Information: DOI: 10.1103/PhysRevD.71.094003; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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