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26 April 2024
 
  » arxiv » hep-ph/0409103

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Effects of Instanton Induced Interaction on the Pentaquarks
Tetsuya Shinozaki ; Makoto Oka ; Sachiko Takeuchi ;
Date 9 Sep 2004
Journal Phys.Rev. D71 (2005) 074025
Subject hep-ph
AbstractRoles of instanton induced interactions (III) in the masses of pentaquark baryons, Theta^+ (J=1/2 and 3/2) and Xi^{--}, and a dibaryon, H, are discussed using the MIT bag model in the negative parity case. It is shown that the two-body terms in III give a strong attraction mainly due to the increase of the number of pairs in multi-quark systems. In contrast, the three-body u-d-s interaction is repulsive. It is found that III lowers the mass of Theta^+ as much as 100 MeV from the mass predicted by the bag model without III.
Source arXiv, hep-ph/0409103
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