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Type: Journal article
Title: Medium dependence of the bag constant in the quark-meson coupling model
Author: Lu, D.
Tsushima, K.
Thomas, A.
Williams, A.
Saito, K.
Citation: Nuclear Physics A, 1998; i(694):443-462
Issue Date: 1998
ISSN: 0375-9474
Abstract: Possible variations of the quark-meson coupling (QMC) model are examined in which the bag constant decreases in the nuclear medium. The reduction is supposed to depend on either the mean scalar field or the effective mass of the nucleon. It is shown that the electric and magnetic radii of the bound nucleon are almost linearly correlated with the bag constant. Using the fact that the size of the bound nucleon inside a nucleus is strongly constrained by y-scaling data in quasi-elastic, electron-nucleus scattering, we set a limit for the reduction allowed in the bag constant for these two models. The present study implies that the bag constant can decrease up to 10-17% at average nuclear density, depending on the details of the model. © 1998 Published by Elsevier Science B.V.
DOI: 10.1016/S0375-9474(98)00181-X
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Special Research Centre for the Subatomic Structure of Matter publications

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