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Contribution of Instanton Induced Interaction for Penta-quarks in MIT Bag Model | | Tetsuya Shinozaki
; Makoto Oka
; Sachiko Takeuchi
; | | Date: |
15 Oct 2004 | | Subject: | hep-ph | | Abstract: | Roles 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. 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 negative-parity Theta^+ as much as 100 MeV from the mass predicted by the bag model without III. | | Source: | arXiv, hep-ph/0410234 | | Services: | Forum | Review | PDF | Favorites | |
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