B=1 Soliton of the Nambu - Jona-Lasinio model in medium}

Details B=1 Soliton of the Nambu - Jona-Lasinio model in medium} B=1 Soliton of the Nambu - Jona-Lasinio model in medium}

1993-03-03

arxiv.org/abs/hep-ph/9303212v1

Nucl.Phys. A564 (1993) 551-563

Physics

High Energy Physics

High Energy Physics - Phenomenology

PHYSTEX, 14 pages, 5 figures (available upon request), Preprint RUB-TPII-26/92

Scientific paper

10.1016/0375-9474(93)90213-H

The solitonic sector of the Nambu - Jona-Lasinio model with baryon number one is solved in the presence of an external medium. The calculations fully include the polarization of both the Dirac sea and the medium as well as the Pauli blocking effect. We found that with an increasing density the medium destabilizes the soliton. At finite medium density the soliton mass gets reduced whereas the mean square baryon radius shows an increase - a swelling of the soliton. At some critical density of about two times nuclear matter density there is no localized solution - the soliton disappears.

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