Tootfinder

In 1967, physicist Andrei Sakharov proposed a set of conditions that must be satisfied to explain the origin of the matter-antimatter asymmetry in the universe,
including violation of the combined charge conjugation and parity (CP) symmetry.
CP symmetry was once thought to be universally conserved,
until this view was overturned in 1964 with the discovery of CP violation in the decay of neutral kaons.
This landmark result later earned the Nobel Prize in Physics in 1…

Nobel Prize in Physics 1980
The Nobel Prize in Physics 1980 was awarded jointly to James Watson Cronin and Val Logsdon Fitch "for the discovery of violations of fundamental symmetry principles in the decay of neutral K-mesons"