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

IF 4.8 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2025-04-09 DOI:10.1140/epjc/s10052-025-14131-y

Yueling Yang, Jiazhi Li, Liting Wang, Junfeng Sun

引用次数: 0

Abstract

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

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对\(\overline{B}_{s}\)\({\rightarrow }\)\(D_{s}^{(*)} {\ell } \bar{\nu }_{\ell }\)的不可因式QED校正衰减

考虑不可因式QED修正，重新计算了半弛豫豫\(\overline{B}_{s}\)\({\rightarrow }\)\(D_{s}^{(*)} {\ell } \bar{\nu }_{\ell }\)衰变的分支比和分支比\(R(D_{s}^{({*})})\)。发现(a) QED的贡献可以提高分支比，降低分支比\(R(D_{s}^{({*})})\)。(b)对于半光子迷人\(\overline{B}_{u,d,s}\)衰变，SU(3)风味对称在R(D)- \(R(D^{*})\)的比值中基本保持良好。(c)目前从形状因素得出的分支比\(\mathcal{B}(\overline{B}_{s} {\rightarrow } D_{s}^{*} {\ell } \bar{\nu }_{\ell })\)的理论不确定性非常大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

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