From LHCbPhysics@hep.social on Mastodon: Test of lepton flavour universality using B⁰ → D*⁻τ⁺ν decays with hadronic τ channels https:// arxiv.org/abs/2305.01463 - The lepton universality test R(D*⁻)≡B(B⁰ → D*⁻τ⁺ν)/B(B⁰ → D*⁻μ ν) is calculated as 0.247±0.015±0.015±0.012.