Quark and gluon condensates in the quark-meson coupling model

Details Quark and gluon condensates in the quark-meson coupling model Quark and gluon condensates in the quark-meson coupling model

1997-09-22

arxiv.org/abs/nucl-th/9709040v2

Mod.Phys.Lett.A13:769-778,1998

Physics

Nuclear Physics

Nuclear Theory

Latex 14 pages, 2 postscript figures. Result is presented in terms of a different aspect. Disucussions and summary are drastic

Scientific paper

10.1142/S0217732398000838

Using the quark-meson coupling (QMC) model, we study the density dependence of the quark and gluon condensates in nuclear matter. We show that the change of the quark condensate is mainly driven by the scalar field in the medium and that the reduction of the quark condensate is suppressed at high density, even in the mean-field approximation. The gluon condensate decreases by 4 - 6 % at nuclear saturation density. We also give a simple relationship between the change of the quark condensate and that of a hadron mass in the medium.

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