Eur. Phys. J. C (2004) 36: 37-42
https://doi.org/10.1140/epjc/s2004-01868-3On the direct CP-violation parameter
https://doi.org/10.1140/epjc/s2004-01868-3
theoretical physics
On the direct CP-violation parameter 
Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
* e-mail: marco.sozzi@sns.it
We review different definitions of the parameter describing direct CP-violation in neutral kaon decays, which was precisely measured in recent experiments, and point out the inconsistency of some of them due to a CPT-constraint. The proper comparison of the experimental results to the theoretical computations is discussed.
© Springer-Verlag, 2004
