SWhat changed
Observed two-pion decays of the long-lived neutral kaon inconsistent with exact CP conservation.
Scientific scope
The record is the exact four-author 1964 Physical Review Letters paper. It is the reported neutral-kaon experiment, not the later Kobayashi-Maskawa mechanism, direct CP-violation measurements or every subsequent CP test.
Evidence
The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact four-author 1964 Physical Review Letters paper. It is the reported neutral-kaon experiment, not the later Kobayashi-Maskawa mechanism, direct CP-violation measurements or every subsequent CP test.
Contributors
- J. H. Christenson · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- J. W. Cronin · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- V. L. Fitch · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- R. Turlay · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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