Status and future prospects for CLFV searches at BESIII

TL;DR

This paper reports the latest search results for charged Lepton Flavor Violation in $J/$ decays at BESIII, setting an upper limit on the branching fraction and discussing future prospects based on simulations.

Contribution

It provides new experimental upper limits on $J/ ightarrow e\u03bc$ decay and discusses future search prospects at BESIII.

Findings

Upper limit on $J/ ightarrow e\u03bc$ branching fraction is $1.6 imes 10^{-7}$.

Analysis based on $225.3 imes 10^6$ $J/$ events.

Future prospects discussed with Monte Carlo simulations.

Abstract

Here we present the latest results of the charged Lepton Flavor Violation process searches at the BESIII experiment in the decay of $J/\psi$ to $e\mu$, using $(225.3\pm2.8)\times10^6$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider. An upper limit on the branching fraction of $B(J/\psi \rightarrow e\mu)<1.6\times10^{-7}$ (90$\%$ C.L.) is obtained. The prospects and challenges with the future data are also discussed based on MC simulation.