Probing Lepton Flavour Universality with ${\Lambda }_b$ decays to ${\tau }^{+}{\tau }^{-}$ final states

Marzia Bordone, Gino Isidori, Christiane Mayer +1

We present a study of the rare baryonic decay ${\Lambda }_b\to \Lambda {\tau }^{+}{\tau }^{-}$ as a probe of new physics (NP) coupled preferentially to third-generation fermions. Within the Standard Model, we e…