One Gluon Exchange Effect on the Saturation Property of Strange Quark Systems in the Bag Model : Nuclear Physics

概要

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In order to clarify the saturation property of strange quark matter, we investigate how the energy per baryon of strange quark matter varies as the baryon number N_b increases, from the viewpoint of the bag model. We incorporate the one-gluon-exchange (OGE) effect in a potential form, which enables us to calculate its contribution to the energy of finite systems beyond the lowest orbital configurations. Calculations have been done for the closed-shell configurations up to N_b≤24 and the infinite matter. It is found that the OGE effect brings about such a general trend that the energy per baryon increases as N_b gets larger, commonly for a variety of model parameters. This tendency is qualitatively different from the results known so far without OGE effect that the energy per baryon is a decreasing function of N_b. This implies that the OGE effect is unfavorable for the existence of absolutely stable strange quark matter, in conformity with the tendency found in a quark cluster model calculation made previously.
理論物理学刊行会の論文
1993-03-25