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  • Open Access

Improved prediction of the mass splitting for P-wave Ω baryons

Niu Su1,2,*, Hua-Xing Chen3,†, Philipp Gubler4,‡, and Atsushi Hosaka2,4,§

  • *Contact author: suniu@tyut.edu.cn
  • †Contact author: hxchen@seu.edu.cn
  • ‡Contact author: philipp.gubler1@gmail.com
  • §Contact author: hosaka@rcnp.osaka-u.ac.jp
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Phys. Rev. D 113, 016005 – Published 7 January, 2026

DOI: https://doi.org/10.1103/nrl4-2yst

Abstract

Using the QCD sum rule method, we investigate the mass splitting for the spin-orbit partner states of the Ω(2012) baryon assuming that it is a P-wave excitation with JP=3/2−. This study is an extension of the previous work [N. Su et al.Phys. Rev. D 110, 034007 (2024)] in which the masses of these states were estimated with uncertainties too large to extract the reliable mass splitting. In the present study, by directly formulating a sum rule for the mass splitting, we obtain an improved prediction, δM=M3/2−−M1/2−=−18.0−17.1+33.6  MeV. This result provides a more quantitative insight into the spectrum of P-wave Ω baryons and serves as a useful reference for future experiments.

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Phys. Rev. D 113, 016005– Published 7 January, 2026
  • Received 10 October 2025
  • Accepted 15 December 2025
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