학술논문
A new measurement of direct CP violation in the neutral kaon system
Document Type
article
Author
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
Source
Physics Letters B. 317(1-2)
Subject
Language
Abstract
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.