A new measurement of direct CP violation in two pion decays of the neutral kaon
arXiv:hep-ex/9909022 · doi:10.1016/S0370-2693(99)01030-8
Abstract
The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 by simultaneously collecting K_L and K_S decays into pi0pi0 and pi+pi-. The result for the CP violating parameter Re(epsilon'/epsilon) is (18.5 +/- 4.5(stat)} +/- 5.8 (syst))x10^{-4}.
18 pages, 6 figures