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The soliton formation in sigma models

Authors: M. Fiolhais, J. da ProvidĂȘncia, M. Rosina, and C. A. de Sousa

Ref.: Physical Review C 56, 3311-3319 (1997)

Abstract: The connection between the linear sigma model and the Nambu-Jona-Lasinio model is investigated on the basis of a conventional Hartree-Fock approach. As a missing link, an intermediate model is used: a linear sigma model with quarks (including the Dirac sea) but no "Mexican hat". This model is particularly convenient to study the conditions for soliton formation and the stability of the soliton when the Dirac sea is included.

URL: nautilus.fis.uc.pt