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- W4313446039 abstract "We derive a factorization theorem for the structure-dependent QED effects in the weak exclusive process $B^-toell^-barnu_ell$, i.e., effects probing the internal structure of the $B$ meson. The derivation requires a careful treatment of endpoint-divergent convolutions common to subleading-power factorization formulas. We find that the decay amplitude is sensitive to two- and three-particle light-cone distribution amplitudes of the $B$ meson as well as to a new hadronic parameter $F(mu,Lambda)$, which generalizes the notion of the $B$-meson decay constant in the presence of QED effects. This is the first derivation of a subleading-power factorization theorem in which the soft functions are non-perturbative hadronic matrix elements." @default.
- W4313446039 created "2023-01-06" @default.
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- W4313446039 date "2022-12-29" @default.
- W4313446039 modified "2023-10-18" @default.
- W4313446039 title "Structure-Dependent QED Effects in Exclusive B Decays at Subleading Power" @default.
- W4313446039 doi "https://doi.org/10.48550/arxiv.2212.14430" @default.
- W4313446039 hasPublicationYear "2022" @default.
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