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Semileptonic decay of double strangeness heavy flavor baryons

Hui-Hui Duan ^1,*, Yong-Lu Liu ^2,†, Qin Chang ^1,‡, and Ming-Qiu Huang^2,§

¹School of Physics, Henan Normal University, Xinxiang 453007, Henan, People’s Republic of China
²Department of Physics, National University of Defense Technology, Changsha 410073, Hunan, People’s Republic of China

^*Contact author: duanhuihui@htu.edu.cn
^†Contact author: yongluliu@nudt.edu.cn
^‡Contact author: qinchang@htu.edu.cn
^§Contact author: mqhuang@nudt.edu.cn

Phys. Rev. D 112, 054030 – Published 19 September, 2025

DOI: https://doi.org/10.1103/bz9p-dzfh

Abstract

This paper investigates the double strangeness heavy flavor baryons $Ω_{c}^{0}$ and $Ω_{b}^{-}$ , which contain two strange quarks. Using QCD light-cone sum rules (LCSRs), we calculate the form factors for the Cabibbo-suppressed processes $Ω_{c}^{0} \to Ξ^{-}$ and $Ω_{b}^{-} \to Ξ^{0}$ , corresponding to the heavy quark transitions $c \to d$ and $b \to u$ , respectively. Combining these with the helicity amplitude formalism for semileptonic decay differential widths, we computed the branching fractions of their corresponding semileptonic decay processes. Our analysis reveals significant discrepancies between two versions of QCD LCSRs: one using the light-cone distribution amplitudes (LCDAs) of the final-state $Ξ$ baryon and the other using the LCDAs of the initial-state double strangeness heavy flavor baryons. The results obtained with the $Ξ$ baryon’s LCDAs show excellent agreement with other theoretical calculations. However, when using the LCDAs of the double strangeness heavy flavor baryons, the results differ by orders of magnitude, warranting further investigation.

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Phys. Rev. D 112, 054030– Published 19 September, 2025

Vol. 112, Iss. 5 — 1 September 2025

Received 2 June 2025
Accepted 24 August 2025

DOI: https://doi.org/10.1103/bz9p-dzfh

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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Semileptonic decay of double strangeness heavy flavor baryons

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