Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-12-12
Phys.Lett.B429:239-246,1998; Erratum.ibid.B436:453,1998
Physics
Nuclear Physics
Nuclear Theory
Latex, 11 pages, 4 Postscript figures, a few typos which can be important for an interpretation (but not reflected in the resu
Scientific paper
10.1016/S0370-2693(98)00488-2
The properties of the kaon, $K$, and antikaon, $\kbar$, in nuclear medium are studied in the quark-meson coupling (QMC) model. Employing a constituent quark-antiquark (MIT bag model) picture, their excitation energies in a nuclear medium at zero momentum are calculated within mean field approximation. The scalar, and the vector mesons are assumed to couple directly to the nonstrange quarks and antiquarks in the $K$ and $\kbar$ mesons. It is demonstrated that the $\rho$ meson induces different mean field potentials for each member of the isodoublets, $K$ and $\kbar$, when they are embedded in asymmetric nuclear matter. Furthermore, it is also shown that this $\rho$ meson potential is repulsive for the $K^-$ meson in matter with a neutron excess, and renders $K^-$ condensation less likely to occur.
Saito Katsuhiko
Thomas Anthony W.
Tsushima Kazuo
Wright Stewart V.
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