Search for the proton decay mode p → [bar over v]K[superscript +] with KamLAND
Name
PhysRevD.92.052006.pdf
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Author(s)
Asakura, K.
Gando, A.
Gando, Y.
Hachiya, T.
Hayashida, S.
Ikeda, H.
Inoue, K.
Ishidoshiro, K.
Ishikawa, T.
Ishio, S.
Date Issued
September 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Asakura, K., et al. "Search for the proton decay mode p → [bar over v]K[superscript +] with KamLAND." Phys. Rev. D 92, 052006 (September 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We present a search for the proton decay mode p → [bar over ν]K[superscript +] based on an exposure of 8.97 kton-years in the KamLAND experiment. The liquid scintillator detector is sensitive to successive signals from p → [bar over ν]K[superscript +] 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 → [bar over ν]K[superscript +]) > 5.4 × 10[superscript 32] years at 90% C.L.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.92.052006
