Excitation Spectrum in the Friedberg-Lee Model

Details Excitation Spectrum in the Friedberg-Lee Model Excitation Spectrum in the Friedberg-Lee Model

2001-01-09

arxiv.org/abs/nucl-th/0101019v1

Prog.Theor.Phys. 105 (2001) 449-458

Physics

Nuclear Physics

Nuclear Theory

12 pages including 4 figures(eps). Prog. Theor. Phys. in press

Scientific paper

10.1143/PTP.105.449

The excitation spectrum of the nucleon with the spin 1/2 is examined by using the Friedberg-Lee model containing the constituent quark and the scalar meson. An appropriate way of quantization for the non-linear meson field is employed by taking account of the non-topological soliton existed in the classical level. Our model space for the nucleon resonances includes the three-quark plus one-meson state in addition to the pure three-quark state. The excitation spectrum in this model space shows that the positive parity state appears as the first excited state associated with the 0s-excitation of the scalar meson. The meson excitation also generates the additional negative parity state apart from the well-known 0p-excitation of the quark.

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