On sum rules for semi-leptonic b → c and b → u decays

Abstract The semi-leptonic b → clν processes are receiving a lot of attention, as the lepton flavor universality (LFU) violation has been hinted by the measured ratios R D ∗ $$ {R}_{D^{\left(\ast \right)}} $$ = Γ(B → D (∗) τν)/Γ(B → D (∗) ℓν) for ℓ = e, μ. Recently, it has also been pointed out that...

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Bibliographic Details
Main Authors: Wen-Feng Duan, Syuhei Iguro, Xin-Qiang Li, Ryoutaro Watanabe, Ya-Dong Yang
Format: Article
Language:English
Published: SpringerOpen 2025-07-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP07(2025)166
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