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Phenomenology of $D_{s 1}$ mesons radiative transitions

Budker Institute of Nuclear Physics of SB RAS, 630090 Novosibirsk, Russia and Novosibirsk State University, 630090 Novosibirsk, Russia

^*Contact author: A.E.Bondar@inp.nsk.su
^†Contact author: A.I.Milstein@inp.nsk.su

Phys. Rev. D 111, 114019 – Published 20 June, 2025

DOI: https://doi.org/10.1103/64y1-qyvt

Abstract

We discuss radiative transitions $D_{s 1} \to D_{s} γ$ and $D_{s 1} \to D_{s}^{*} γ$ of $p$ -wave mesons. Since $D_{s 1}$ mesons have no certain $C$ -parity, and the masses of quarks in these mesons differ significantly, then due to the spin-orbit interaction, each of the $p$ -wave mesons with the total angular momentum $J = 1$ is a superposition of states with the total spin of quarks $S_{tot} = 0$ and $S_{tot} = 1$ . We explain why the partial width of $D_{s 1} (2460) \to D_{s} γ$ radiative transition is significantly larger than the corresponding value for $D_{s 1} (2536) \to D_{s} γ$ . We also predict the corresponding partial widths of $B_{s 1}$ and $B_{c 1}$ .

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Phys. Rev. D 111, 114019– Published 20 June, 2025

Vol. 111, Iss. 11 — 1 June 2025

Received 6 May 2025
Accepted 6 June 2025

DOI: https://doi.org/10.1103/64y1-qyvt

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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Phenomenology of $D_{s 1}$ mesons radiative transitions

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Phenomenology of Ds1 mesons radiative transitions

Abstract

Physics Subject Headings (PhySH)

Article Text

References (29)

Phenomenology of $D_{s 1}$ mesons radiative transitions