Abstract
We have compared the decay rates of and to and final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter is equal to . This result definitively establishes the existence of CP violation in a decay process.
- Received 27 May 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.22
©1999 American Physical Society