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What can we learn from the radiative decays of the $D_{s 1} (2460)$ meson?

Hai-Long Fu ^1,2,*, Feng-Kun Guo ^1,2,†, Christoph Hanhart ^3,‡, and Alexey Nefediev ^4,§

¹Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
²School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
³Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany
⁴Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany

^*Contact author: fuhailong@itp.ac.cn
^†Contact author: fkguo@itp.ac.cn
^‡Contact author: c.hanhart@fz-juelich.de
^§Contact author: a.nefediev@uni-bonn.de

Phys. Rev. D 113, 074026 – Published 20 April, 2026

DOI: https://doi.org/10.1103/786l-tjny

Abstract

We study the radiative decays $D_{s 1} (2460) \to γ D_{s 0}^{*} (2317)$ and $D_{s 1} (2460) \to γ D^{0} K^{+} / γ D^{+} K^{0}$ and argue them to constitute a paradigmatic case of reactions sensitive to the short-range component of the decaying meson wave function that can, in principle, be quantified in a model-independent way employing experimental data. We demonstrate how a simultaneous measurement of the above radiative decay widths, or at least a constraint on the ratio of the corresponding branching fractions, can allow one to probe the nature of the $D_{s 0}^{*} (2317)$ and $D_{s 1} (2460)$ mesons.

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Phys. Rev. D 113, 074026– Published 20 April, 2026

Vol. 113, Iss. 7 — 1 April 2026

Received 15 December 2025
Accepted 11 March 2026

DOI: https://doi.org/10.1103/786l-tjny

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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What can we learn from the radiative decays of the $D_{s 1} (2460)$ meson?

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What can we learn from the radiative decays of the Ds1(2460) meson?

Abstract

Physics Subject Headings (PhySH)

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References (48)

What can we learn from the radiative decays of the $D_{s 1} (2460)$ meson?