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26 April 2024 |
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Quark-mass dependence of baryon resonances | | M.F.M. Lutz
; C. García-Recio
; E.E. Kolomeitsev
; J. Nieves
; | | Date: |
16 Dec 2003 | | Journal: | Nucl.Phys. A754 (2005) 212-220 | | Subject: | nucl-th | | 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_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. | | Source: | arXiv, nucl-th/0401035 | | Services: | Forum | Review | PDF | Favorites | |
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