Search for Proton Decay through p [r arrow] [bar [nu]]K[sup +] in a Large Water Cherenkov Detector

Journal Article · Sun Aug 01 00:00:00 EDT 1999 · Physical Review Letters

OSTI ID:6078016

Fukuda, Y; Hayakawa, T; Inoue, K; Ishihara, K; Ishino, H; Itow, Y; Kajita, T; Kameda, J; Kasuga, S; Kobayashi, K; Kobayashi, Y; Koshio, Y; Miura, M; Nakahata, M; Nakayama, S; Obayashi, Y; Okada, A; Okumura, K; Sakurai, N; Shiozawa, M ; Suzuki, Y; Takeuchi, H; Takeuchi, Y; Totsuka, Y; Yamada, S ^[1]; Earl, M; Habig, A; Kearns, E; Messier, M D; Scholberg, K; Stone, J L; Sulak, L R; Walter, C W ^[2]; Goldhaber, M ^[3]; Barszczak, T; Casper, D; Gajewski, W; Kropp, W R; Mine, S; Price, L R; Smy, M; Sobel, H W; Vagins, M R; Haines, T J; Kielczewska, D ^[4]; Ganezer, K S; Keig, W E

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1. Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188-8502 (Japan)
2. Department of Physics, Boston University, Boston, Massachusetts 02215 (United States)
3. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
4. Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575 (United States)

We present results of a search for proton decays, p[r arrow][bar [nu]]K[sup +] , using data from a 33 kt[center dot]yr exposure of the Super-Kamiokande detector. Two decay modes of the kaon, K[sup +][r arrow][mu][sup +][nu][sub [mu]] and K[sup +][r arrow][pi][sup +][pi][sup 0] , were studied. The data were consistent with the background expected from atmospheric neutrinos; therefore a lower limit on the partial lifetime of the proton [tau]/B(p[r arrow][bar [nu]] K[sup +]) was found to be 6.7[times]10[sup 32] years at 90[percent] confidence level. [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 6078016
• Journal Information: Physical Review Letters, Vol. 83:8; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRINOS
CHERENKOV COUNTERS
GRAND UNIFIED THEORY
KAONS PLUS
LIFETIME
MUONS
PARTICLE DECAY
PIONS
PIONS NEUTRAL
PIONS PLUS
PROTONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
KAONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MEASURING INSTRUMENTS
MESONS
NEUTRINOS
NUCLEONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS
662360* - Decays of Baryons- (1992-)
662350 - Decays of Mesons- (1992-)