Quark mass dependence of s-wave baryon resonances
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Quark mass dependence of s-wave baryon resonances

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Quark mass dependence of s-wave baryon resonances

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García Recio, Carmen; Lutz, Matthias F.M.; Nieves Pamplona, Juan Miguel
This document is a artículoDate2004

Este documento está disponible también en : http://hdl.handle.net/10550/39254
We study the quark mass dependence of J(P) = 1/2(-) s-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 similar or equal to 500 MeV the resonances turn into bound states forming two octets plus a singlet representations of the SU(3) group. A contrasted result is obtained in the 'light' SU(3) limit with m(pi) = m(K) similar or equal to 140 MeV for which no resonances exist. Using physical quark masses our analysis suggests to assign to the S = -2 resonances Xi(1690) and Xi(1620) the quantum numbers J(P) = 1/2(-).

    García Recio, Carmen Lutz, Matthias F.M. Nieves Pamplona, Juan Miguel 2004 Quark mass dependence of s-wave baryon resonances Physics Letters B 582 1-2 49 54
http://dx.doi.org/10.1016/j.physletb.2003.11.073

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