Chiral quark-soliton model in the Wigner-Seitz approximation

Details Chiral quark-soliton model in the Wigner-Seitz approximation Chiral quark-soliton model in the Wigner-Seitz approximation

1999-10-29

arxiv.org/abs/nucl-th/9910074v1

Phys.Rev. C61 (2000) 055201

Physics

Nuclear Physics

Nuclear Theory

30 pages, 13 figures; uses REVTeX and epsfig

Scientific paper

10.1103/PhysRevC.61.055201

In this paper we study the modification of the properties of the nucleon in the nucleus within the quark-soliton model. This is a covariant, dynamical model, which provides a non-linear representation of the spontaneously broken SU(2)_L X SU(2)_R symmetry of QCD. The effects of the nuclear medium are accounted for by using the Wigner-Seitz approximation and therefore reducing the complex many-body problem to a simpler single-particle problem. We find a minimum in the binding energy at finite density, a change in the isoscalar nucleon radius and a reduction of the in-medium pion decay constant. The latter is consistent with a partial restoration of chiral symmetry at finite density, which is predicted by other models.

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