Open Access

Excited $Ω$ hyperon in charmful $Ω_{b}$ weak decays

Kai-Lei Wang ^1,2,*, Juan Wang^1,3,†, Yu-Kuo Hsiao^3,‡, and Xian-Hui Zhong^2,4,§

¹Department of Physics, Changzhi University, Changzhi, Shanxi 046011, China
²Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), Hunan Normal University, Changsha 410081, China
³School of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
⁴Department of Physics, Hunan Normal University, and Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Changsha 410081, China

^*Contact author: wangkaileicz@foxmail.com
^†Contact author: wjuanmm@163.com
^‡Contact author: yukuohsiao@gmail.com
^§Contact author: zhongxh@hunnu.edu.cn

Phys. Rev. D 111, 114028 – Published 24 June, 2025

DOI: https://doi.org/10.1103/4g99-psnm

Abstract

We investigate the sextet $b$ -baryon decay processes $Ω_{b} \to J / ψ Ω^{(*)}$ , where $Ω^{*}$ represents the $1 P$ -, $1 D$ - and $2 S$ -wave excited $Ω$ hyperons in the spectroscopy. Using the constituent quark model, we obtain $B (Ω_{b} \to J / ψ Ω) = 8.8 \times 10^{- 4}$ , which agrees with the previous studies to the order of magnitude. By identifying $Ω (2012)$ as $Ω (1^{2} P_{3 / 2^{-}})$ , $B (Ω_{b} \to J / ψ Ω (2012)) = 1.1 \times 10^{- 3}$ can be similarly significant. Additionally, $Ω (1^{2} D_{5 / 2^{+}})$ and $Ω (1^{4} D_{3 / 2^{+}}, 1^{4} D_{5 / 2^{+}})$ states exhibit production rates of 0.5, and (0.6, 0.8), respectively, relative to their ground-state counterpart. Notably, our findings suggest that $B (Ω_{b} \to J / ψ Ω (2^{2} S_{1 / 2^{+}}, 2^{4} S_{3 / 2^{+}}))$ are as large as $(4.5, 20) \times 10^{- 4}$ , making them accessible to experiments at LHCb.

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Phys. Rev. D 111, 114028– Published 24 June, 2025

Vol. 111, Iss. 11 — 1 June 2025

Received 6 December 2024
Accepted 14 May 2025

DOI: https://doi.org/10.1103/4g99-psnm

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Excited $Ω$ hyperon in charmful $Ω_{b}$ weak decays

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Excited Ω hyperon in charmful Ωb weak decays

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Excited $Ω$ hyperon in charmful $Ω_{b}$ weak decays