Quark-mass dependence of baryon resonances

Abstract

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_π=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_π=m_K \simeq 140 MeV for which no resonances exist.

8 pages, three figures, talk presented at HYP2003

References in corpus (6)

• Chiral Dynamics of the Two Λ(1405) States
• On meson resonances and chiral symmetry
• Quark mass dependence of s-wave baryon resonances
• $S=-1$ Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory and the $S_{01}-$ $\Lambda$(1405) and $-\Lambda$(1670) Resonances
• On baryon resonances and chiral symmetry
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Cited by in corpus (2)

• Large Nc Weinberg-Tomozawa interaction and negative parity s--wave baryon resonances
• On kinematical constraints in the hadrogenesis conjecture for the baryon resonance spectrum