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Chiral Symmetry and N*(1440) -> N pi pi Decay

Autor: Kamano, H., Morishita, M., Arima, M.

Publikováno v: Phys.Rev. C71 (2005) 045201

The N*(1440) -> N pi pi decay is studied by making use of the chiral reduction formula. This formula suggests a scalar-isoscalar pion-baryon contact interaction which is absent in the recent study of Hern{\'a}ndez et al. The contact interaction is in

Externí odkaz: http://arxiv.org/abs/nucl-th/0412032

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Excitation Spectrum in the Friedberg-Lee Model

Autor: Kowata, H., Arima, M.

Publikováno v: Prog.Theor.Phys. 105 (2001) 449-458

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 accou

Externí odkaz: http://arxiv.org/abs/nucl-th/0101019

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Dynamical Test of Constituent Quark Models with $\pi N$ Reactions

Autor: Yoshimoto, T., Sato, T., Arima, M., Lee, T. -S. H.

Publikováno v: Phys.Rev. C61 (2000) 065203

A dynamical approach is developed to predict the $\pi N$ scattering amplitudes starting with the constituent quark models. The first step is to apply a variational method to solve the three-quark bound state problem. The resulting wave functions are

Externí odkaz: http://arxiv.org/abs/nucl-th/9908048

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Nucleon resonances in the constituent quark model with chiral symmetry

Autor: Kowata, H., Arima, M., Masutani, K.

Publikováno v: Prog.Theor.Phys. 100 (1998) 339-352

The mass spectra of nucleon resonances with spin 1/2, 3/2, and 5/2 are systematically studied in the constituent quark model with meson-quark coupling, which is inspired by the spontaneous breaking of chiral symmetry of QCD. The meson-quark coupling

Externí odkaz: http://arxiv.org/abs/nucl-th/9712042

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