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 04:00:00 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), Journal Name: Physical Review Letters; (USA) Vol. 64:13; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BOSONS
CP INVARIANCE
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONIC PARTICLE DECAY
HADRONS
INFORMATION
INTERACTIONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
KAONS NEUTRAL SHORT-LIVED
KOBAYASHI-MASKAWA MATRIX
MASS
MATRICES
MESONS
MONTE CARLO METHOD
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES
UNIFIED-FIELD THEORIES