Abstract From the history of the $\theta$-$\tau$ puzzle and the discovery of parity non-conservation in 1956, we review the current status of discrete symmetry violations in the weak interaction. Possible origin of these symmetry violations are discussed.
Received: 18 April 2006
Accepted manuscript online:
PACS:
11.30.Er
(Charge conjugation, parity, time reversal, and other discrete symmetries)
Fund: Based on an invited talk given at the 2006 APS Meeting as the first presentation in the Session on 50 Years Since the Discovery of Parity Nonconservation in the Weak Interaction I, April 22, 2006 (Appendix A).
Cite this article:
Lee T. D. (李政道) New insights to old problems 2006 Chinese Physics 15 1125
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