On baryon resonances and chiral symmetry
Nuclear Theory
2009-07-09 v2
Abstract
We study J^P=(3/2)^- baryon resonances as generated by chiral coupled-channel dynamics. Parameter free results are obtained in terms of the Weinberg-Tomozawa term predicting the leading s-wave interaction strength of Goldstone bosons with baryon-decuplet states. In the 'heavy' SU(3) limit with m_\pi = m_K \sim 500 MeV the resonances turn into bound states forming a decuplet and octet representation of the SU(3) group. Using physical masses the mass splitting are remarkably close to the empirical pattern.
Keywords
Cite
@article{arxiv.nucl-th/0305101,
title = {On baryon resonances and chiral symmetry},
author = {E. E. Kolomeitsev and M. F. M. Lutz},
journal= {arXiv preprint arXiv:nucl-th/0305101},
year = {2009}
}
Comments
revised version: includes two additional references, gives improved discussions and eliminted some misprints