抄録
We present a search for the proton decay mode p→ν¯K+ based on an exposure of 8.97 kton-years in the KamLAND experiment. The liquid scintillator detector is sensitive to successive signals from p→ν¯K+ with unique kinematics, which allow us to achieve a detection efficiency of 44%, higher than previous searches in water Cherenkov detectors. We find no evidence of proton decays for this mode. The expected background, which is dominated by atmospheric neutrinos, is 0.9±0.2 events. The nonbackground-subtracted limit on the partial proton lifetime is τ/B(p→ν¯K+)>5.4×1032years at 90% C.L.
本文言語 | English |
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論文番号 | 052006 |
ジャーナル | Physical Review D - Particles, Fields, Gravitation and Cosmology |
巻 | 92 |
号 | 5 |
DOI | |
出版ステータス | Published - 2015 9月 23 |
ASJC Scopus subject areas
- 核物理学および高エネルギー物理学
- 物理学および天文学(その他)