Marco Milesi

28 July 2020
40th International Conference on High Energy Physics

Abstract: The lepton flavour universality predicted by the Standard Model is challenged by various measurements of b-hadron decays involving tau and light leptons. The Belle II experiment started recording first collision data in Spring 2019 and offers a unique laboratory to study lepton flavour universality in leptonic and semileptonic decays of B mesons at high precision. In this talk, we report the status of establishing first measurements of 𝐵→𝜏𝜈¯𝜏, 𝐵→𝜇𝜈¯, and 𝐵→𝐷(∗)𝜏𝜈¯𝜏 processes using the available Belle II data and discuss the future potential of investigating the 𝑅(𝐷(∗)) anomaly.