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Identifying triple-strangeness $Ω$ hyperons in light of recent experimental results

Si-Qiang Luo^1,2,3,* and Xiang Liu ^1,2,4,3,†

¹School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
²Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Key Laboratory of Quantum Theory and Applications of MoE, Gansu Provincial Research Center for Basic Disciplines of Quantum Physics, Lanzhou University, Lanzhou 730000, China
³Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China
⁴MoE Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China

^*Contact author: luosq15@lzu.edu.cn
^†Contact author: xiangliu@lzu.edu.cn

Phys. Rev. D 112, 014047 – Published 31 July, 2025

DOI: https://doi.org/10.1103/18md-j4bf

Abstract

In this work, we systematically calculate the mass spectra and decay widths of $Ω$ baryons with $N \leq 3$ , where $N = 2 n_{ρ} + 2 n_{λ} + l_{ρ} + l_{λ}$ is the shell of the three-body harmonic oscillator. In our scheme, the newly observed $Ω (2109)$ is identified as a $N = 2$ candidate, with its quantum numbers tentatively assigned as $Ω (2 S, 3 / 2^{+})$ . However, the experimentally measured mass exhibits a deviation of approximately 50 MeV below the theoretical predictions. The possible reason for this deviation, along with the suggestion for experiments, are discussed in this paper. Additionally, we give possible assignments of $Ω (2012)^{-}$ , $Ω (2250)^{-}$ , $Ω (2380)^{-}$ , and $Ω (2470)^{-}$ . Furthermore, we calculate the masses and widths of other missing $Ω$ states, which could provide valuable clues for experimental searches aimed at discovering these states.

Physics Subject Headings (PhySH)

Quark model

Article Text

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Phys. Rev. D 112, 014047– Published 31 July, 2025

Vol. 112, Iss. 1 — 1 July 2025

Received 28 April 2025
Accepted 6 July 2025

DOI: https://doi.org/10.1103/18md-j4bf

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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Identifying triple-strangeness $Ω$ hyperons in light of recent experimental results

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Identifying triple-strangeness Ω hyperons in light of recent experimental results

Abstract

Physics Subject Headings (PhySH)

Article Text

References (53)

Identifying triple-strangeness $Ω$ hyperons in light of recent experimental results