%0 Journal Article
%T Theoretical study of the Xi(1620) and Xi(1690) resonances in Xi(c)-> pi(+) MB decays
%A Miyahara, K.
%A Hyodo, T.
%A Oka, M.
%A Nieves, J.
%A Oset, E.
%J Physical Review C
%D 2017
%V 95
%N 3
%I Amer Physical Soc
%@ 2469-9985
%G English
%F Miyahara_etal2017
%O WOS:000399144100008
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3044), last updated on Fri, 28 Apr 2017 08:38:03 +0000
%X Nonleptonic weak decays of Xi(c) into pi(+) and a meson (M)-baryon (B) final state, MB, are analyzed from the viewpoint of probing S = -2 baryon resonances, i.e., Xi(1620) and Xi(1690), of which spin-parity and other properties are not well known. We argue that the weak decay of Xi(c) is dominated by a single quark-line diagram, preferred by the Cabibbo-Kobayashi-Maskawa coefficient, color recombination factor, the diquark correlation, and the kinematical condition. The decay process has an advantage of being free from meson resonances in the p+ M invariantmass distribution. The invariant mass distribution of the meson-baryon final state is calculated with three different chiral unitary approaches, assuming that the Xi(1620) and Xi(1690) resonances have J(P) = 1/2(-). It is found that a clear peak for the Xi(1690) is seen in the pi Xi and K Lambda spectra. We also suggest that the ratios of the pi Xi, K Lambda, and K Sigma final states are useful to distinguish whether the peak is originated from the Xi(1690) resonance or it is a K Sigma threshold effect.
%R 10.1103/PhysRevC.95.035212
%U http://arxiv.org/abs/1609.00895
%U https://doi.org/10.1103/PhysRevC.95.035212
%P 035212-12pp