Nobel Prize in Physics in 1988 2026-10-18
Awarded in equal thirds to Leon Max Lederman, Melvin Schwartz and Jack Steinberger for the neutrino-beam method and demonstrating the doublet structure of leptons through discovery of the muon neutrino.[ref]
The Nobel Prize in Physics 1988 by Nobel Prize Outreach. Official Steinberger facts: one-third share, three named laureates and neutrino-beam/lepton-doublet motivation; the equal three-person partition follows from the official Nobel Foundation rule.