Search for the decay K{sub L}{yields}{pi}{sup 0}{nu}{nu}(bar sign) using {pi}{sup 0}{yields}e{sup +}e{sup -}{gamma}

Journal Article · Sat Apr 01 04:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.072006· OSTI ID:20215951

Alavi-Harati, A ^[1]; Albuquerque, I F ^[2]; Alexopoulos, T ^[1]; Arenton, M ^[3]; Arisaka, K ^[4]; Averitte, S ^[2]; Barker, A R ^[5]; Bellantoni, L ^[6]; Bellavance, A ^[7]; Belz, J ^[2]

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1. University of Wisconsin, Madison, Wisconsin 53706 (United States)
2. Rutgers University, Piscataway, New Jersey 08855 (United States)
3. The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
4. University of California at Los Angeles, Los Angeles, California 90095 (United States)
5. University of Colorado, Boulder, Colorado 80309 (United States)
6. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
7. Rice University, Houston, Texas 77005 (United States)

We report on a search for the decay K{sub L}{yields}{pi}{sup 0}{nu}{nu}(bar sign), carried out as a part of E799-II, a rare K{sub L} decay experiment at Fermilab. Within the standard model, the K{sub L}{yields}{pi}{sup 0}{nu}{nu}(bar sign) decay is dominated by direct CP violating processes, and thus an observation of the decay implies confirmation of direct CP violation. No events were observed, and we set an upper limit for the branching ratio of K{sub L}{yields}{pi}{sup 0}{nu}{nu}(bar sign) to be < 5.9 x10{sup -7} at the 90% confidence level. (c) 2000 The American Physical Society.

• OSTI ID: 20215951
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRINOS
BRANCHING RATIO
CP INVARIANCE
EXPERIMENTAL DATA
KAONS
NEUTRINOS
PAIR PRODUCTION
PIONS NEUTRAL
SEMILEPTONIC DECAY
STANDARD MODEL