Effects of Instanton Induced Interaction on the Pentaquarks
High Energy Physics - Phenomenology
2008-11-26 v1
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 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.
Cite
@article{arxiv.hep-ph/0409103,
title = {Effects of Instanton Induced Interaction on the Pentaquarks},
author = {Tetsuya Shinozaki and Makoto Oka and Sachiko Takeuchi},
journal= {arXiv preprint arXiv:hep-ph/0409103},
year = {2008}
}
Comments
11 pages, 3 figures