Tests of light-lepton universality in angular asymmetries of $B^0\to D^{\ast -}\ell \nu$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +416

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 f…