Search for $\ddot{I}{„}^{-}\to \hat{I}{¼}^{-}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ decays at the LHCb experiment with Run 2 data

Abstract

A search for the lepton-flavour-violating decay $\ddot{I}{„}^{-}\to \hat{I}{¼}^{-}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb${}^{-1}$. An upper limit of $1.9(2.3)\times 10^{-8}$ is set at the 90% (95%) confidence level on the branching fraction of the decay.

All figures and tables, along with any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/3373 (LHCb public pages)