Multi-quark interactions with a globally stable vacuum

Alexander A. Osipov; Brigitte Hiller; Joao da Providencia

doi:10.1016/j.physletb.2006.01.008

paper

Multi-quark interactions with a globally stable vacuum

arXiv:hep-ph/0508058 · doi:10.1016/j.physletb.2006.01.008

Abstract

It is shown that $U (3)_{L} \times U (3)_{R}$ eight-quark interactions stabilize the asymmetric ground state of the well-known model with four-quark Nambu -- Jona-Lasinio and six-quark 't Hooft interactions. The result remains when the reduced SU(3) f\mbox{}lavour symmetry is explicitly broken by the general current quark mass term with $m^_{u} \neq = m^_{d} \neq = m^_{s}$ .

LaTeX, 17 pages, 2 figures, version to appear in Phys. Lett. B