Quark-mass dependence of baryon resonances

Details Quark-mass dependence of baryon resonances Quark-mass dependence of baryon resonances

2004-01-16

arxiv.org/abs/nucl-th/0401035v1

Nucl.Phys.A754:212-220,2005

Physics

Nuclear Physics

Nuclear Theory

8 pages, three figures, talk presented at HYP2003

Scientific paper

10.1016/j.nuclphysa.2005.01.037

We study the quark-mass dependence of J^P = \frac12^- s-wave and J^P = \frac32^- d-wave baryon resonances. Parameter-free results are obtained in terms of the leading order chiral Lagrangian. In the 'heavy' SU(3) limit with m_\pi =m_K \simeq 500 MeV the s-wave resonances turn into bound states forming two octets plus a singlet representations of the SU(3) group. Similarly the d-wave resonances turn into bound states forming an octet and a decuplet in this limit. A contrasted result is obtained in the 'light' SU(3) limit with m_\pi =m_K \simeq 140 MeV for which no resonances exist.

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