Limit on the branching ratio of [ital K][sub [ital L]][r arrow][pi][sup 0][nu][bar [nu]]

Journal Article · Mon Jun 13 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.3758· OSTI ID:7233343

Weaver, M; Arisaka, K; Roberts, D; Slater, W ^[1]; Briere, R A; Cheu, E; Harris, D A; Roodman, A; Schwingenheuer, B; Wah, Y W; Winstein, B; Winston, R ^[2]; Barker, A R ^[3]; Swallow, E C ^[4]; Bock, G J; Coleman, R; Crisler, M; Enagonia, J; Ford, R; Hsiung, Y B ; Jensen, D A; McFarland, K S; Ramberg, E; Tschirhart, R ^[5]; Collins, E M; Gollin, G D ^[6]; Nakaya, T; Yamanaka, T ^[7]

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1. University of California Los Angeles, Los Angeles, California 90024 (United States)
2. The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
3. University of Colorado, Boulder, Colorado 80309 (United States)
4. Elmhurst College, Elmhurst, Illinois 60126 (United States) The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
5. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
6. University of Illinois, Urbana, Illinois 61801 (United States)
7. Department of Physics, Osaka University, Toyonaka, Osaka 560 (J

We report on a search for the decay [ital K][sub [ital L]][r arrow][pi][sup 0][nu][bar [nu]] by the Fermilab E799 Collaboration. The partial width for this mode is related in a calculable way to the [ital CP] violation parameters of the standard model. In particular, the decay [ital K][sub [ital L]][r arrow][pi][sup 0][nu][bar [nu]] is predicted to proceed almost entirely via a direct [ital CP] violating amplitude. No events were observed, allowing us to set an upper limit on the branching ratio of [ital B]([ital K][sub [ital L]][r arrow][pi][sup 0][nu][bar [nu]])[lt]5.8[times]10[sup [minus]5] at the 90% confidence level.

• OSTI ID: 7233343
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:24; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINOS
ANTIPARTICLES
BOSONS
BRANCHING RATIO
CP INVARIANCE
DECAY
DIMENSIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
LIMITING VALUES
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
SEMILEPTONIC DECAY
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS
VIOLATIONS
WEAK PARTICLE DECAY
WIDTH