Observation of Direct CP Violation in KS,L --> ππ Decays
Abstract
We have compared the decay rates of KL and KS to π+π- and π0π0 final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter Re\(ɛ'/ɛ\) is equal to [28.0+/-3.0\(stat\)+/-2.8\(syst\)]×10-4. This result definitively establishes the existence of CP violation in a decay process.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 1999
- DOI:
- 10.1103/PhysRevLett.83.22
- arXiv:
- arXiv:hep-ex/9905060
- Bibcode:
- 1999PhRvL..83...22A
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 12 pages, 4 figures