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Tests of light-lepton universality in angular asymmetries of B⁰ to D^(*-) ell ν decays
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arxiv 2308.02023 v3 pith:ZBQN3WN4 submitted 2023-08-03 hep-ex
Tests of light-lepton universality in angular asymmetries of B⁰ to D^(*-) ell ν decays
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We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral $B$ is fully reconstructed in $\Upsilon\left(4S\right)\to{}B \overline{B}$ decays in data corresponding to $189~\mathrm{fb}^{-1}$ integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.
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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.
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$\bar B\to D^{(*)}\ell\bar \nu$ Branching Ratios and Evidence for Isospin Breaking in $\Upsilon(4S)$ Decays
hep-ph 2026-04 unverdicted novelty 5.0
A combined fit to B to D(*) l nu data yields R^{±0}=1.062(19) as evidence for isospin violation in Υ(4S) decays and branching fractions up to 1.6σ larger than prior averages, addressing inconsistencies in V_cb extractions.
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