On charm baryon resonances and chiral symmetry

Abstract 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 c 1 (2593), Λ c 0 (2880) and Ξ c 1 (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.