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A new measurement of direct CP violation in the neutral kaon system
- Barr, GD;
- Buchholz, P;
- Carosi, R;
- Coward, D;
- Cundy, D;
- Doble, N;
- Gatignon, L;
- Gibson, V;
- Grafström, P;
- Hagelberg, R;
- van der Lans, J;
- Nelson, HN;
- Wahl, H;
- Peach, KJ;
- Blümer, H;
- Heinz, R;
- Kleinknecht, K;
- Mayer, P;
- Panzer, B;
- Renk, B;
- Rohrer, H;
- Sander, HG;
- Wagner, A;
- Augé, E;
- Fournier, D;
- Heusse, P;
- Iconomidou-Fayard, L;
- Harrus, I;
- Perdereau, O;
- Schaffer, AC;
- Serin, L;
- Bertanza, L;
- Bigi, A;
- Calafiura, P;
- Calvetti, M;
- Carrozza, MC;
- Casali, R;
- Cerri, C;
- Fantechi, R;
- Mannelli, IG;
- Marzulli, VM;
- Nappi, A;
- Pierazzini, G;
- Holder, M;
- Kreutz, A;
- Quast, G;
- Rost, M;
- Werthenbach, R;
- Zech, G
- et al.
Published Web Location
https://doi.org/10.1016/0370-2693(93)91599-iAbstract
A new measurement of the ratio of the CP-violating amplitudes for KL → 2π0 and KL → π+π- is reported. The measured value for R = {divides}η00/η+-{divides}2 is 0.9878±0.0026±0.0030, where the first error is the statistical uncertainty and the second is the estimate of the systematic uncertainty. This gives a value for the parameter describing direct CP violation: Re ε{lunate}'/ε{lunate} = (2.0 ± 0.7) × 10-3. © 1993.
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