Strange S--Wave Excitation of the NJL Soliton

Details Strange S--Wave Excitation of the NJL Soliton Strange S--Wave Excitation of the NJL Soliton

1993-12-13

arxiv.org/abs/hep-ph/9312269v1

Phys.Rev.D49:5958-5969,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pp LaTeX, 4 figures postscript-files included at the end of the LaTeX-file

Scientific paper

10.1103/PhysRevD.49.5958

The recently developed method to investigate mesonic fluctuations off the chiral soliton in the Nambu--Jona--Lasinio model is applied to kaons in the S--wave channel. It is shown that for commonly accepted choices of parameters the presence of the soliton and the lack of confinement in this model provide an unphysical (valence) quark threshold which is lower than the kaon mass. Choosing parameters such that this threshold is avoided a bound state is obtained in the S--wave channel. After semiclassical quantization this state acquires the quantum numbers of an odd parity $\Lambda$ and is predicted at about 420MeV above the nucleon mass.

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