A precision measurement of direct CP violation in the decay of neutral kaons into two pions

Details A precision measurement of direct CP violation in the decay of neutral kaons into two pions A precision measurement of direct CP violation in the decay of neutral kaons into two pions

2002-08-08

arxiv.org/abs/hep-ex/0208009v1

Phys.Lett.B544:97-112,2002

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 5 figures, to be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(02)02476-0

The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 running period was devoted to collecting additional data under varied conditions compared to earlier years (1997-99). The new data yield the result: Re(epsilon'/epsilon) = (13.7 +/- 3.1) times 10^{-4}. Combining this result with that published from the 1997, 98 and 99 data, an overall value of Re(epsilon'/epsilon) = (14.7 +/- 2.2) times 10^{-4} is obtained from the NA48 experiment.

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