Interactions between octet baryons in the SU6 quark model - art. no. 054001

Baryon-baryon interactions for the complete baryon octet (B-8) are investig ated in a unified framework of the resonating-group method, in which the sp in-flavor SU6 quark-model wave functions are employed. Model parameters are determined to reproduce properties of the nucleon-nucleon system and the l ow-energy cross section data for the hyperon-nucleon interaction. We then p roceed to explore B8B8 interactions in the strangeness S = - 2, - 3, and - 4 sectors. The S-wave phase-shift behavior and total cross sections are sys tematically understood by (1) the spin-flavor SU6 symmetry, (2) the special role of the pion exchange, and (3) the flavor symmetry breaking.