Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara
| Summary:
We present the first comprehensive tests of light-lepton universality in the
angular distributions of semileptonic Bz-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
PUpsilonFourS{} $toBoverline{B}$ decays in data corresponding to lumion
integrated luminosity from electron-positron collisions collected with the
belletwo detector. We find no significant deviation from the standard model
expectations.
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