Neglected heavy leptons at the LHC

New heavy leptons with standard model gauge couplings have well determined cross sections for pair production. A standard pattern of mass mixing implies that the most likely decays are $τ^\prime\to W ν'$ and $ν'\to W τ$. Interestingly there have been no direct searches for heavy leptons with these decays at the LHC. However comparison with several multi-lepton searches allow us to set new limits on the heavy lepton masses. Three observed excesses in the signal regions prevent us from setting stronger limits.

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