Determination of Re(. var epsilon. prime /. var epsilon. ) by the simultaneous detection of the four K sub L , S r arrow. pi. pi. decay modes

Journal Article · Mon Mar 26 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.1491· OSTI ID:6829260

Patterson, J R; Barker, A; Briere, R A; Gibbons, L K; Makoff, G; Papadimitriou, V; Somalwar, S; Wah, Y W; Winstein, B; Winston, R; Woods, M; Yamamoto, H ^[1]; Swallow, E ^[2]; Bock, G J; Coleman, R; Enagonio, J; Hsiung, Y B; Stanfield, K; Stefanski, R; Yamanaka, T ^[3] ; Blair, G; Gollin, G D; Karlsson, M; Okamitsu, J K; Tschirhart, R ^[4]; Brisson, J C; Debu, P; Peyaud, B; Turlay, R; Vallage, B ^[5]

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1. The Enrico Fermi Institute, The University of Chicago, Chicago, IL (USA) The Department of Physics, The University of Chicago, Chicago, Illinois 60637 (USA)
2. Department of Physics, Elmhurst College, Elmhurst, Illinois 60126 (USA) Department of Physics, The University of Chicago, Chicago, Illinois 60637 (USA)
3. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (USA)
4. Department of Physics, Princeton University, Princeton, New Jersey 08544 (USA)
5. Department de Physique des Particules Elementaires, Centre d'Etudes Nucleaires de Saclay, F-91191 Gif-sur-Yvette CEDEX,

The E731 experiment at Fermilab has searched for direct {ital CP} violation in {ital K}{sup 0}{r arrow}{pi}{pi}, which is parametrized by {var epsilon}{prime}/{var epsilon}. For the first time all four of the {ital K}{sub {ital L},}{ital S}{r arrow}{pi}{pi} modes were collected simultaneously, which greatly facilitated studies of systematic uncertainty. We find Re({var epsilon}{prime}/{var epsilon})={minus}0.0004{plus minus}0.0014(stat){plus minus}0.0006(syst). The result provides no evidence for direct {ital CP} violation.

• OSTI ID: 6829260
• Journal Information: Physical Review Letters; (USA), Vol. 64:13; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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