Search for Proton Decay via {ital p} {r_arrow} {ital e}{sup +}{ital {pi}}{sup 0} in a Large Water Cherenkov Detector
Journal Article
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· Physical Review Letters
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- Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188-8502 (Japan)
- Department of Physics, Boston University, Boston, Massachusetts 02215 (United States)
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- Department of Physics and Astronomy, University of California---Irvine, Irvine, California 92697-4575 (United States)
- Department of Physics, California State University, Dominguez Hills, Carson, California 90747 (United States)
- Department of Physics, George Mason University, Fairfax, Virginia 22030 (United States)
- Department of Physics, Gifu University, Gifu, Gifu 501-1193 (Japan)
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501 (Japan)
- Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)
We have searched for proton decay via p{r_arrow}e{sup +}{pi}{sup 0} using data from a 25.5 kton{center_dot}yr exposure of the Super-Kamiokande detector. We find no candidate events with an expected background induced by atmospheric neutrinos of 0.1thinspthinspevents. From these data, we set a lower limit on the partial lifetime of the proton {tau}/B{sub p{r_arrow}e{sup +}{pi}{sup 0}} to be 1.6{times}10{sup 33} years at a 90{percent} confidence level. {copyright} {ital 1998} {ital The American Physical Society }
- OSTI ID:
- 326853
- Journal Information:
- Physical Review Letters, Vol. 81, Issue 16; Other Information: PBD: Oct 1998
- Country of Publication:
- United States
- Language:
- English
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