Symmetric and Antisymmetric Spin-Orbit Forces in YN Interaction by a Quark Model

Details Symmetric and Antisymmetric Spin-Orbit Forces in YN Interaction by a Quark Model Symmetric and Antisymmetric Spin-Orbit Forces in YN Interaction by a Quark Model

1998-07-17

arxiv.org/abs/hep-ph/9807401v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages (LaTeX), 2 figures (eps); Talk at the 1st SUT-KEK seminar on 6 Apr 1998 at Science Univ of Tokyo, Noda campus

Scientific paper

The symmetric and antisymmetric spin-orbit forces (SLS and ALS) in the YN interaction are investigated for relative P-wave systems by a valence quark model with the instanton-induced interaction (III). The size of the adiabatic potential at the zero range is shown for each of the YN channels. The nonlocal RGM potential of the LS and ALS forces are also shown for typical YN channels. The size of ALS is comparable to SLS. The channel dependence of ALS, which is determined by the flavor SU(3) symmetry when the one-gluon exchange (OGE) and/or the meson exchange interaction are used, deviates after introducing III. In most of the two-baryon channels, including the two-nucleon channel, the spin-orbit force of the YN interaction is strong. A few exceptional channels, however, are found where III and OGE are canceled to each other, and the spin-orbit force becomes small.

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