On charm baryon resonances and chiral symmetry

We study heavy-light baryon resonances with quantum numbers J P= 1 2 − in terms of the non-linear chiral SU(3) Lagrangian. Within the χ–BS(3) approach a parameter-free leading order prediction is obtained for the scattering of Goldstone bosons off heavy-light baryon resonances with J P= 1 2 + . The...

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Bibliographic Details
Published in:Nuclear physics. A 2004-01, Vol.730 (1), p.110-120
Main Authors: Lutz, M.F.M., Kolomeitsev, E.E.
Format: Article
Language:English
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Summary:We study heavy-light baryon resonances with quantum numbers J P= 1 2 − in terms of the non-linear chiral SU(3) Lagrangian. Within the χ–BS(3) approach a parameter-free leading order prediction is obtained for the scattering of Goldstone bosons off heavy-light baryon resonances with J P= 1 2 + . The three states Λ c1 (2593), Λ c0 (2880) and Ξ c1 (2790) discovered by the CLEO Collaboration are recovered. We suggest the existence of resonance states that form an anti-quindecimplet, two sextet and two anti-triplet representations of the SU(3) group. In particular, narrow states with anomalous isospin ( I) and strangeness ( S) quantum numbers (I,S)=( 1 2 ,+1) are anticipated.
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2003.10.012