A NEW MEASUREMENT OF DIRECT CP VIOLATION IN THE NEUTRAL KAON SYSTEM

Authors
BARR GD BUCHHOLZ P CAROSI R COWARD D CUNDY D DOBLE N GATIGNON L GIBSON V GRAFSTROM P HAGELBERG R VANDERLANS J NELSON HN WAHL H PEACH KJ BLUMER H HEINZ R KLEINKNECHT K MAYER P PANZER B RENK B ROHRER H SANDER HG WAGNER A AUGE E FOURNIER D HEUSSE P ICONOMIDOUFAYARD 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
Citation
Gd. Barr et al., A NEW MEASUREMENT OF DIRECT CP VIOLATION IN THE NEUTRAL KAON SYSTEM, Physics letters. Section B, 317(1-2), 1993, pp. 233-242
Citations number
10
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
317
Issue
1-2
Year of publication
1993
Pages
233 - 242
Database
ISI
SICI code
0370-2693(1993)317:1-2<233:ANMODC>2.0.ZU;2-A
Abstract
A new measurement of the ratio of the CP-violating amplitudes for K(L) --> 2pi0 and K(L) --> pi+pi- is reported. The measured value for R = \eta00/eta+-\2 is 0.9878 +/- 0.0026 +/- 0.0030, where the first error is the statistical uncertainty and the second is the estimate of the s ystematic uncertainty. This gives a value for the parameter describing direct CP violation: Re epsilon'/epsilon = (2.0 +/- 0.7) X 10(-3).