Decay widths of the excited Omega(b) baryons

Abstract

The LHCb Collaboration recently observed five narrow Omega(0)(c) resonances and measured their masses and widths through the decays Omega(0)(c) -> Xi(+)(c) K-. Motivated by this discovery, and also by the fact that the groundstate bottom baryon Omega(-)(b) with spin 1/2 was already found experimentally, we perform a theoretical investigation of the spin-1/2 and spin-3/2, Omega(b), baryons by calculating the decay width of their first orbitally and radially excited states to Xi(0)(b) K-. For this purpose, we employ the QCD sum rule method on the light cone by including in the analysis the K-meson distribution amplitudes up to twist 4. Obtained analytical expressions are utilized to extract parameters of these decay processes, which may be useful for forthcoming experimental studies of bottom baryons.