Search for fractionally charged particles in Kamiokande II

Journal Article · Wed May 01 00:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.2843· OSTI ID:5466471

Mori, M; Oyama, Y; Suzuki, A; Takahashi, K; Yamada, M ^[1]; Miyano, K; Miyata, H; Takei, H ^[2]; Hirata, K S; Kajita, T; Kihara, K; Nakahata, M; Nakamura, K; Ohara, S; Sato, N; Suzuki, Y; Totsuka, Y; Yaginuma, Y ^[3]; Koshiba, M ^[4]; Suda, T ; Tajima, T ^[5]; Fukuda, Y; Nagashima, Y; Takita, M ^[6]; Kaneyuki, K; Tanimori, T ^[7]; Beier, E W; Frank, E D; Frati, W; Kim, S B; Mann, A K; Newcomer, F M; Van Berg, R; Zhang, W ^[8]

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1. National Laboratory for High Energy Physics (KEK), Ibaraki 305, Japan (JP)
2. Department of Physics, Niigata University, Niigata 950-21, (Japan)
3. Institute for Cosmic Ray Research, University of Tokyo, Tokyo 188, (Japan)
4. Tokai University, Tokyo 151, (Japan)
5. Department of Physics, Faculty of Science, Kobe University, Hyogo 657, (Japan)
6. Department of Physics, Osaka University, Osaka 560, (Japan)
7. Department of Physics, Tokyo Institute of Technology, Tokyo 152, (Japan)
8. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (USA

A search has been made for fractionally charged particles with {vert bar}{ital Q}{vert bar}=1/3 and {vert bar}{ital Q}{vert bar}=2/3 which might have passed through the Kamiokande II detector. No positive evidence for such particles is observed in 1009 days of observation. The 90%-C.L. upper limits obtained on the fluxes of fractionally charged particles are 2.1{times}10{sup {minus}15} cm{sup {minus}2} s{sup {minus}1} sr{sup {minus}1} for {vert bar}{ital Q}{vert bar}=1/3 and 2.3{times}10{sup {minus}15} cm{sup {minus}2} s{sup {minus}1} sr{sup {minus}1} for {vert bar}{ital Q}{vert bar}=2/3, improving the existing limits by two orders of magnitude.

• OSTI ID: 5466471
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUARKS
CHARGED PARTICLE DETECTION
CHERENKOV COUNTERS
COSMIC RADIATION
EXPERIMENTAL DATA
LIMITING VALUES
MEASURING METHODS
DATA
DETECTION
ELEMENTARY PARTICLES
FERMIONS
INFORMATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
NUMERICAL DATA
POSTULATED PARTICLES
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
645100* - High Energy Physics- Particle Interactions & Properties-Experimental