An experimental particle physicist who coauthored the Christenson-Cronin-Fitch-Turlay kaon CP violation experiment. Its spark chambers and magnetic analysis reconstructed two charged decay tracks in a neutral kaon beam. The rare two-pion signal exposed a failure of CP symmetry, showing why identifying a small decay component can test a fundamental symmetry.[ref]
Evidence for the 2π Decay of the K₂⁰ Meson by James H. Christenson and others. pp. 138–140: apparatus, event selection and two-pion result
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