PoS - Proceedings of Science
Volume 295 - The 19th International Workshop on Neutrinos from Accelerators NUFACT2017 (NuFact2017) - Working group 4: Lepton and hadron cLFV - Muonium
Status and future prospects for charged lepton flavor violation searches at BESIII
K. Xiaoshen* and  On behalf of the BESIII collaboration
Full text: pdf
Pre-published on: February 06, 2018
Published on: June 18, 2018
Abstract
Based on $(225.3\pm2.8)\times10^6$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider in Beijing in 2009, the charged Lepton Flavor Violation (cLFV) process $J/\psi\to e\mu$ is studied. The upper limit of the branching fraction is measured to be $\mathcal{B}(J/\psi\to e\mu)<1.6\times10^{−7}$ at 90\% confidence level (C.L.). Compared with BESII result, the precision is improved. The sensitivity of branching fraction based on MC simulation is provided.
DOI: https://doi.org/10.22323/1.295.0119
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