Letter
Open Access

Puzzles in charmed baryon semileptonic decays with $S U (3)_{F}$ flavor symmetry and lattice inputs

Chao-Qiang Geng¹, Chia-Wei Liu¹, and Sheng-Lin Liu ^1,2,3,*

¹School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
²Institute of Theoretical Physics, UCAS, Beijing 100190, China
³University of Chinese Academy of Sciences, 100190 Beijing, China

^*Contact author: liushenglin22@mails.ucas.ac.cn

Phys. Rev. D 114, L011301 – Published 6 July, 2026

DOI: https://doi.org/10.1103/h61y-61xw

Abstract

Recent measurements of charmed-baryon semileptonic decays signal large tensions between experiment and theory, including $S U (3)_{F}$ analyses and lattice-quantum chromodynamics simulations. Possible sources of the discrepancy include the experimental normalization mode $Ξ_{c}^{0} \to Ξ^{-} π^{+}$ . Using lattice-quantum chromodynamics inputs in an $S U (3)_{F}$ analysis including first-order symmetry breaking, we predict $B (Ξ_{c}^{+} \to Σ^{0} ℓ^{+} ν_{ℓ}) / B (Ξ_{c}^{+} \to Ξ^{0} ℓ^{+} ν_{ℓ}) = (2.6 \pm 0.3) %$ , and $B (Ξ_{c}^{+} \to Λ ℓ^{+} ν_{ℓ}) / B (Ξ_{c}^{+} \to Ξ^{0} ℓ^{+} ν_{ℓ}) = (1.1 \pm 0.1) %$ , with $ℓ^{+} = (e^{+}, μ^{+})$ . These ratios provide normalization-independent tests and may help clarify the origin of the present tension.

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Phys. Rev. D 114, L011301– Published 6 July, 2026

Vol. 114, Iss. 1 — 1 July 2026

Received 17 March 2026
Accepted 28 May 2026

DOI: https://doi.org/10.1103/h61y-61xw

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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Puzzles in charmed baryon semileptonic decays with $S U (3)_{F}$ flavor symmetry and lattice inputs

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Puzzles in charmed baryon semileptonic decays with SU(3)F flavor symmetry and lattice inputs

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Puzzles in charmed baryon semileptonic decays with $S U (3)_{F}$ flavor symmetry and lattice inputs