TY  - JOUR
AU  - Miyahara, K.
AU  - Hyodo, T.
AU  - Oka, M.
AU  - Nieves, J.
AU  - Oset, E.
PY  - 2017
DA  - 2017//
TI  - Theoretical study of the Xi(1620) and Xi(1690) resonances in Xi(c)-> pi(+) MB decays
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 035212
EP  - 12pp
VL  - 95
IS  - 3
PB  - Amer Physical Soc
AB  - 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.
SN  - 2469-9985
UR  - http://arxiv.org/abs/1609.00895
UR  - https://doi.org/10.1103/PhysRevC.95.035212
DO  - 10.1103/PhysRevC.95.035212
LA  - English
N1  - WOS:000399144100008
ID  - Miyahara_etal2017
ER  -