The Skyrmion limit of the Nambu--Jona-Lasinio soliton

Abstract

The special role of the isoscalar mesons ($\sigma$ and $\omega$) in the NJL soliton is discussed. Stable soliton solutions are obtained when the most general ansatz compatible with vanishing grand spin is assumed. These solutions are compared to soliton solutions of a purely pseudoscalar Skyrme type model which is related to the NJL model by a gradient expansion and the limit of infinitely heavy (axial-) vector mesons.

11 LaTeX pages 2 figures appended as postscript file, UNITÜ-THEP-14/1994

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• Nonlinear rigid-body quantization of Skyrmions