arXiv:nucl-th/9912059·v1·Nuclear Theory
Hyperon Single-Particle Potentials Calculated from SU6 Quark-Model Baryon-Baryon Interactions
M. Kohno (1) · Y. Fujiwara (2) · T. Fujita (2) · C. Nakamoto (3) · Y. Suzuki (4) ((1) Kyushu Dental College · (2) Kyoto University · (3) Suzuka National College of Technology · (4) Niigata University)
Abstract
Using the SU6 quark-model baryon-baryon interaction recently developed by the Kyoto-Niigata group, we calculate NN, Lambda N and Sigma N G-matrices in ordinary nuclear matter. This is the first attempt to discuss the Lambda and Sigma single-particle potentials in nuclear medium, based on the realistic quark-model potential. The Lambda potential has the depth of more than 40 MeV, which is more attractive than the value expected from the experimental data of Lambda-hypernuclei. The Sigma potential turns out to be repulsive, the origin of which is traced back to the strong Pauli repulsion in the Sigma N (I=3/2) ^3S_1 state.
Comments: 20 pages, 5 figures