New limit on the K{sub L}{sup 0}{yields}{pi}{sup 0}{nu}{nu} decay rate

Journal Article · Fri Sep 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.051105· OSTI ID:20871072

Ahn, J K; Lee, H S; Lee, S Y ^[1]; Akune, Y; Fujioka, Y; Ishibashi, S; Kobayashi, S; Sugiyama, A; Tsukamoto, T ^[2]; Baranov, V; Kurilin, A S; Kuzmin, E; Moisseenko, A; Perov, S; Podolsky, S; Porokhovoy, S; Tsamalaidze, Z ^[3]; Doroshenko, M ^[4]; Hsiung, Y B ^[5]; Inagaki, T ^[6]

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1. Department of Physics, Pusan National University, Busan, 609-735 (Korea, Republic of)
2. Department of Physics, Saga University, Saga, 840-8502 (Japan)
3. Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, Moscow Region, 141980 (Russian Federation)
4. Department of Particle and Nuclear Research, Graduate University for Advanced Science (SOKENDAI), Tsukuba, Ibaraki, 305-0801 (Japan)
5. Department of Physics, National Taiwan University, Taipei, Taiwan 10617 (China)
6. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, 305-0801 (Japan)

The first dedicated experiment for the rare kaon decay K{sub L}{sup 0}{yields}{pi}{sup 0}{nu}{nu} has been performed by the E391a Collaboration at the KEK 12-GeV proton synchrotron. A new upper limit of 2.1x10{sup -7} at the 90% confidence level was set for the branching ratio of the decay K{sub L}{sup 0}{yields}{pi}{sup 0}{nu}{nu} using about 10% of the data collected during the first period of data taking.

• OSTI ID: 20871072
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
GEV RANGE
KAONS NEUTRAL LONG-LIVED
KEK SYNCHROTRON
LIMITING VALUES
NEUTRINOS
PARTICLE DECAY
PIONS NEUTRAL