@article{6e2bfc15f4e94a079bc60f4924492f5f,
title = "Observation of direct CP violation in ks, l→ΠΠ decays",
abstract = "We have compared the decay rates of KL and KS toΠ+ Π- 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 (μ{\textquoteright}/μ) 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.",
author = "\{KTeV Collaboration\} and A. Alavi-Harati and Albuquerque, \{I. F.\} and T. Alexopoulos and M. Arenton and K. Arisaka and S. Averitte and Barker, \{A. R.\} and L. Bellantoni and A. Bellavance and J. Belz and \{Ben David\}, R. and Bergman, \{D. R.\} and E. Blucher and Bock, \{G. J.\} and C. Bown and S. Bright and E. Cheu and S. Childress and R. Coleman and Corcoran, \{M. D.\} and G. Corti and B. Cox and Crisler, \{M. B.\} and Erwin, \{A. R.\} and R. Ford and A. Glazov and A. Golossanov and G. Graham and J. Graham and K. Hagan and E. Halkiadakis and K. Hanagaki and S. Hidaka and Hsiung, \{Y. B.\} and V. Jejer and J. Jennings and Jensen, \{D. A.\} and R. Kessler and Kobrak, \{H. G.E.\} and \{La Due\}, J. and A. Lath and A. Ledovskoy and \{Mc Bride\}, \{P. L.\} and \{Mc Manus\}, \{A. P.\} and P. Mikelsons and E. Monnier and T. Nakaya and U. Nauenberg and Nelson, \{K. S.\} and H. Nguyen",
year = "1999",
doi = "10.1103/PhysRevLett.83.22",
language = "English (US)",
volume = "83",
pages = "22--27",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "1",
}