Martin Lewis Perl coauthored the evidence that led to identification of the tau lepton. The experiment found electron-muon pairs of opposite electric charges in electron–positron annihilation, with missing energy and momentum and no other detected charged particles or photons. The distributions required additional unseen particles. Studying these unusual final states provided a route to recognizing a new unstable lepton, even though it decayed before leaving a directly visible track.[ref]
An experimental physicist who led particle searches at SLAC.[ref]
Professional profile of Martin Lewis Perl. Independent professional identity
Portrait of Martin Lewis Perl
. Unknown photographer; source Fermilab (fnal.gov); existing Commons crop by Cookai1205. Public domain in the United States (US Department of Energy employee work). Source usage terms, via Wikimedia Commons. Source.
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