抄録
Searches for a nucleon decay into a charged antilepton (e + or μ +) plus a light meson (π0, π -, η, ρ0, ρ -, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9kiloton•years, which includes a 91.7kiloton•year exposure (1489.2 live days) of Super-Kamiokande-I and a 49.2kiloton•year exposure (798.6 live days) of Super-Kamiokande II. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation. No significant evidence for a nucleon decay was observed in the data. Thus, lower limits on the nucleon partial lifetime at 90% confidence level were obtained. The limits range from 3.6×1031 to 8.2×1033years, depending on the decay modes.
本文言語 | 英語 |
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論文番号 | 112001 |
ジャーナル | Physical Review D - Particles, Fields, Gravitation and Cosmology |
巻 | 85 |
号 | 11 |
DOI | |
出版ステータス | 出版済み - 2012 6月 5 |