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$Ξ_{c} \to Ξ$ semileptonic decays: A light cone sum rules view on the experiment-lattice tension

T. M. Aliev ^1,*, S. Bilmis ^1,2,†, and M. Savci ^1,‡

¹Department of Physics, Middle East Technical University, Ankara, 06800, Turkey
²TUBITAK ULAKBIM, Ankara, 06510, Turkey

^*Contact author: taliev@metu.edu.tr
^†Contact author: sbilmis@metu.edu.tr
^‡Contact author: savci@metu.edu.tr

Phys. Rev. D 113, 014008 – Published 9 January, 2026

DOI: https://doi.org/10.1103/16zp-mzpd

Abstract

We present a light-cone QCD sum rule (LCSR) analysis of the semileptonic decays of $Ξ_{c}$ baryons, focusing on the channels $Ξ_{c}^{0} \to Ξ^{-} ℓ^{+} ν_{ℓ}$ , and $Ξ_{c}^{+} \to Ξ^{0} ℓ^{+} ν_{ℓ}$ . The transition form factors are calculated within the light-cone quantum chromodynamics (QCD) sum rules framework, using the distribution amplitudes of the heavy $Ξ_{c}$ baryons. The obtained form factors are then used to compute the differential and total decay widths, as well as the branching fractions. Our numerical results for the branching fractions are $B (Ξ_{c}^{0} \to Ξ^{-} ℓ^{+} ν_{ℓ}) = (3.73 \pm 1.04) %$ , $B (Ξ_{c}^{0} \to Ξ^{-} μ^{+} ν_{μ}) = (3.59 \pm 1.01) %$ , $B (Ξ_{c}^{+} \to Ξ^{0} ℓ^{+} ν_{ℓ}) = (11.2 \pm 3.25) %$ , and $B (Ξ_{c}^{+} \to Ξ^{0} μ^{+} ν_{μ}) = (10.8 \pm 3.13) %$ . These results are in good agreement with recent lattice QCD calculations, while being larger than the current experimental measurements and differing from the predictions of other theoretical approaches.

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References (33)

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Phys. Rev. D 113, 014008– Published 9 January, 2026

Vol. 113, Iss. 1 — 1 January 2026

Received 12 September 2025
Accepted 17 December 2025

DOI: https://doi.org/10.1103/16zp-mzpd

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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$Ξ_{c} \to Ξ$ semileptonic decays: A light cone sum rules view on the experiment-lattice tension

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Ξc→Ξ semileptonic decays: A light cone sum rules view on the experiment-lattice tension

Abstract

Physics Subject Headings (PhySH)

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References (33)

$Ξ_{c} \to Ξ$ semileptonic decays: A light cone sum rules view on the experiment-lattice tension