The QED nonfactorizable correction to the semileptonic charmed three-body B decays

Yueling Yang; Liting Wang; Jiazhi Li; Qin Chang; Junfeng Sun

doi:10.1140/epjc/s10052-024-13647-z

EPJ

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 1282
https://doi.org/10.1140/epjc/s10052-024-13647-z

Regular Article

The QED nonfactorizable correction to the semileptonic charmed three-body B decays

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

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

^a yangyueling@htu.edu.cn

Received: 8 October 2024
Accepted: 22 November 2024
Published online: 10 December 2024

Abstract

In this paper, the nonfactorizable photonic corrections to the effective four-fermion vertex for the $\bar{B}$ $\overline{B}$ $\to$ ${\rightarrow }$ $D^{(*)}$ $D^{({*})}$ $+$ $$+$$ $ℓ^{-}$ ${\ell }^{-}$ $+$ $$+$$ ${\bar{ν}}_{ℓ}$ $\bar{\nu }_{\ell }$ decays are considered at the quark level within SM, where $ℓ$ ${\ell }$ $=$ $$=$$ e, $μ$ ${\mu }$ and $τ$ ${\tau }$ . It is found that the QED corrections are closely related with the mass of the charged lepton. The QED contributions will enhance branching ratios, which results in the slight reduction of ratios $R (D^{(*)})$ $R(D^{(*)})$ and the relationship $R {(D^{(*)})}_{e}$ $R(D^{(*)})_{e}$ < $R {(D^{(*)})}_{μ}$ $R(D^{(*)})_{\mu }$ .

© The Author(s) 2024

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