Contribution of Instanton Induced Interaction for Penta-quarks in MIT Bag Model
High Energy Physics - Phenomenology
2017-08-23 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. 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 -- 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.
Cite
@article{arxiv.hep-ph/0410234,
title = {Contribution of Instanton Induced Interaction for Penta-quarks in MIT Bag Model},
author = {Tetsuya Shinozaki and Makoto Oka and Sachiko Takeuchi},
journal= {arXiv preprint arXiv:hep-ph/0410234},
year = {2017}
}
Comments
4 pages, 2 figures, Talk given at International Workshop PENTAQUARK04 at SPring-8, Japan, July 20-23, 2004