Decay widths of the excited $\Omega_b$ baryons

TL;DR

This paper theoretically calculates the decay widths of excited $ ext{Ω}_b$ baryons using QCD sum rules, providing predictions for experimental verification of their properties.

Contribution

It introduces a QCD sum rule approach with light-cone distribution amplitudes to analyze decay widths of excited $ ext{Ω}_b$ baryons, a novel application for these states.

Findings

Decay widths for excited $ ext{Ω}_b$ states are calculated.

Results provide theoretical predictions for future experiments.

Method includes twist-4 distribution amplitudes for accuracy.

Abstract

The LHCb Collaboration recently observed five narrow $\Omega_c^{0}$ resonances, and measured their masses and widths through the decays $ \Omega_c^{0} \to \Xi_c^{+}K^{-}$. Motivated by this discovery, and also by the fact that the ground-state bottom baryon $\Omega_b^{-}$ with spin-1/2 was already found experimentally, we perform theoretical investigation of the spin-1/2 and spin-3/2, $\Omega_b$, baryons by calculating decay width of their first orbitally and radially excited states to $\Xi_b^{0} K^{-}$. For this purpose, we employ QCD sum rule method on the light-cone by including into 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.