The Neutral Kaon System
From the discovery of the to CP violation, 1956–1964, and beyond
The development of the concept of strangeness created something of a puzzle: What is the nature of the K0 and ? They differ only in their strangeness, a quantity not conserved by the weak interactions, through which they decay. Thus, for example, they both can decay into π+π− and π+π−π0. The explanation was given by Gell-Mann and Pais before parity violation was discovered. We present their proposal modified to incorporate parity violation, but assuming ...