Was the Tau lepton discovered before the electron?
No
Yes
They were discovered simultaneously
Not enough information
Answer
No, the tau lepton was discovered after the electron. The electron was discovered in 1897 by J. J. Thomson, while the tau lepton was discovered in 1975 by Martin Perl. The tau lepton is much heavier than the electron, and it has a much shorter lifetime.
Discovering the Brilliance: The Martin Lewis Perl Quiz