| Autor: |
Yueling Yang, Liting Wang, Jiazhi Li, Qin Chang, Junfeng Sun |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
European Physical Journal C: Particles and Fields, Vol 84, Iss 12, Pp 1-15 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1434-6052 |
| DOI: |
10.1140/epjc/s10052-024-13647-z |
| Popis: |
Abstract In this paper, the nonfactorizable photonic corrections to the effective four-fermion vertex for the $$\overline{B}$$ B ¯ $${\rightarrow }$$ → $$D^{({*})}$$ D ( ∗ ) $$+$$ + $${\ell }^{-}$$ ℓ - $$+$$ + $$\bar{\nu }_{\ell }$$ ν ¯ ℓ decays are considered at the quark level within SM, where $${\ell }$$ ℓ $$=$$ = e, $${\mu }$$ μ and $${\tau }$$ τ . 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 < $$R(D^{(*)})_{\mu }$$ R ( D ( ∗ ) ) μ . |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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