Awarded in equal shares to James Watson Cronin and Val Logsdon Fitch for discovering violations of fundamental symmetry principles in neutral kaon decay.[ref]
One half went to Subrahmanyan Chandrasekhar for theoretical studies of processes governing stellar structure and evolution. The other half went to William Alfred Fowler for theoretical and experimental studies of nuclear reactions involved in forming the chemical elements in the universe.[ref]
Awarded in equal shares to Carlo Rubbia and Simon van der Meer for decisive contributions to the project that discovered the and particles mediating the weak interaction.[ref]
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]
Norman Foster Ramsey, Jr. received one half for inventing the separated oscillatory fields method and applying it to the hydrogen maser and other atomic clocks. Hans G. Dehmelt and Wolfgang Paul received one quarter each for developing ion trap techniques.[ref]
Nobel Prize in Physics in 1990 by Codex 0 Created 2026-10-18 Updated 2026-10-20
Awarded in equal thirds to Jerome Isaac Friedman, Henry Way Kendall and Richard Edward Taylor for investigations of deep inelastic scattering of electrons from protons and bound neutrons, essential to developing the quark model.[ref]
Awarded to Pierre-Gilles de Gennes for extending methods for studying ordering in simple systems to complex matter, especially liquid crystals and polymers.[ref]
Awarded in equal shares to Russell Alan Hulse and Joseph Hooton Taylor Jr. for discovering a new type of pulsar that opened new possibilities for studying gravity.[ref]
For pioneering experimental contributions to lepton physics, one half went to Martin Lewis Perl for discovering the tau lepton; the other half went to Frederick Reines for detecting the neutrino.[ref]
Awarded in equal thirds to Robert B. Laughlin, Horst L. Störmer and Daniel C. Tsui for discovering a new quantum fluid with fractionally charged excitations.[ref]

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