Effects of Instantons on the YN Interaction

Details Effects of Instantons on the YN Interaction Effects of Instantons on the YN Interaction

2000-08-17

arxiv.org/abs/hep-ph/0008178v1

Nucl.Phys. A684 (2001) 403-405

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures, FewBody XVI

Scientific paper

10.1016/S0375-9474(01)00434-1

We investigate the symmetric and anti-symmetric spin-orbit forces (SLS and ALS) of the effective $\Lambda$N interaction derived from a quark cluster model with the instanton-induced interaction (\III), which can reproduce the observed YN cross sections as well as the observed NN scattering data. It is found that coupling to the $\Sigma$N channel enhances $\Lambda$N ALS, and therefore that the cancellation between SLS and ALS in the $\Lambda$N channel becomes more complete. This may be one of the major reasons why the single-particle spin-orbit force of $\Lambda$ in nuclei is weak.

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