Abstract
The idea of Celenza, Rosenthal, and Shakin for studying nucleon structure in nuclear matter by having the nuclear mean fields act directly on the quarks in nucleons is applied to the MIT bag model with center-of-mass correction. An attractive scalar potential makes quarks more relativistic by decreasing their masses. The probability for populating the lower Dirac component is thereby increased, the axial charge is reduced, and the Δ — N mass difference is increased. Nucleon magnetic moments become larger, while nucleon bag and matter radii tend to decrease. These results are rather different from those obtained in the CRS quark-diquark model. The limitations of the calculated results are briefly discussed.
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