The nonfactorizable QED correction to the decays

Yueling Yang; Jiazhi Li; Liting Wang; Junfeng Sun

doi:10.1140/epjc/s10052-025-14131-y

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2025) 85: 402
https://doi.org/10.1140/epjc/s10052-025-14131-y

Regular Article - Theoretical Physics

The nonfactorizable QED correction to the ${\bar{B}}_{s}$ $\overline{B}_{s}$ $\to$ ${\rightarrow }$ $D_{s}^{()} ℓ {\bar{ν}}_{ℓ}$ $D_{s}^{()} {\ell } \bar{\nu }_{\ell }$ decays

Yueling Yang^a, Jiazhi Li, Liting Wang and Junfeng Sun

Institute of Particle and Nuclear Physics, Henan Normal University, 453007, Xinxiang, China

^a yangyueling@htu.edu.cn

Received: 17 February 2025
Accepted: 26 March 2025
Published online: 9 April 2025

Abstract

Considering the nonfactorizable QED corrections, the branching ratios and ratios of branching ratios $R (D_{s}^{(*)})$ $R(D_{s}^{({*})})$ for the semileptonic ${\bar{B}}_{s}$ $\overline{B}_{s}$ $\to$ ${\rightarrow }$ $D_{s}^{(*)} ℓ {\bar{ν}}_{ℓ}$ $D_{s}^{(*)} {\ell } \bar{\nu }_{\ell }$ decays are reevaluated. It is found that (a) the QED contributions can enhance the branching ratios and reduce the ratios $R (D_{s}^{(*)})$ $R(D_{s}^{({*})})$ . (b) The SU(3) flavor symmetry holds basically well in the ratios R(D)- $R (D^{*})$ $R(D^{*})$ for the semileptonic charmed ${\bar{B}}_{u, d, s}$ $\overline{B}_{u,d,s}$ decays. (c) The current theoretical uncertainties of branching ratios $B ({\bar{B}}_{s} \to D_{s}^{*} ℓ {\bar{ν}}_{ℓ})$ $\mathcal{B}(\overline{B}_{s} {\rightarrow } D_{s}^{*} {\ell } \bar{\nu }_{\ell })$ from the form factors are very large.

© The Author(s) 2025

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