Search for the Charged Lepton Flavor Violating Decay J/psi -> e tau
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CitationAblikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & BESIII Collaboration. (2021). Search for the charged lepton flavor violating decay $ J/\psi\to e\tau$. arXiv preprint arXiv:2103.11540.
A search for the charged lepton flavor violating decay J/psi -> e(+/-)tau(-/+) with tau(-/+) -> pi(-/+)pi(0)nu(tau) is performed with about 10 x 10(9) J/psi events collected with the BESIII detector at the BEPCII. No significant signal is observed, and an upper limit is set on the branching fraction B(J/psi -> e(+/-)tau(-/+)() < )7.5 x 10( )(-8) at the 90% confidence level. This improves the previously published limit by two orders of magnitude.
SourcePhysical Review D
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