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29 March 2024
 
  » arxiv » hep-ph/0008178

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Effects of Instantons on the YN Interaction
Sachiko Takeuchi ; Yoshihiro Tani ; Makoto Oka ;
Date 17 Aug 2000
Journal Nucl.Phys. A684 (2001) 403-405
Subject hep-ph
AbstractWe 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.
Source arXiv, hep-ph/0008178
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