On baryon resonances and chiral symmetry

Details On baryon resonances and chiral symmetry On baryon resonances and chiral symmetry

2003-05-30

arxiv.org/abs/nucl-th/0305101v2

Phys.Lett.B585:243-252,2004

Physics

Nuclear Physics

Nuclear Theory

revised version: includes two additional references, gives improved discussions and eliminted some misprints

Scientific paper

10.1016/j.physletb.2004.01.066

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.

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