Mean-field treatment of nuclear matter based on non-topological solitons

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Abstract
Medium effects are modelled by treating a nucleon in nuclear matter as a colour-dielectric soliton embedded in uniform mean scalar and vector fields. The scalar and vector parts of the soliton energy are identified and used to construct a nonlinear sigma - omega model for nuclear matter and so determine the scalar and vector fields consistently. The density dependence of nucleon properties due to these fields is studied. Charge radii and magnetic moments are increased in the medium, while gA is quenched. The effective sigma -N coupling is reduced by the omega field, providing a mechanism that can contribute to the stabilization of nuclear matter.