Speaker
Josh Bex
(University of Cambridge (GB))
Description
This talk will present a search for rare $b \rightarrow s \tau^{+} \tau^{-}$ transitions via the decay $\Lambda_{b}^{0} \rightarrow p K^{-} \tau^{+} \tau^{-}$, using $5.4 \ {\rm fb}^{-1}$ of data collected by the LHCb experiment. New Physics explanations for anomalies in combined fits to $R(D)$ and $R(D^{*})$ predict enhanced branching fractions of several orders of magnitude for $b \rightarrow s \tau^{+} \tau^{-}$ processes. This analysis reconstructs $\tau$ leptons through their muonic decays, utilising a selection centred on a multi-class BDT. In this talk I will outline a preliminary selection and expected upper limit for the branching fraction of $\Lambda_{b}^{0} \rightarrow p K^{-} \tau^{+} \tau^{-}$.
Author
Josh Bex
(University of Cambridge (GB))
