Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al
Published
Journal Article
© 2015 American Physical Society. 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.
Full Text
Duke Authors
Cited Authors
- Asakura, K; Gando, A; Gando, Y; Hachiya, T; Hayashida, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Ishikawa, T; Ishio, S; Koga, M; Matsuda, R; Matsuda, S; Mitsui, T; Motoki, D; Nakamura, K; Obara, S; Oki, Y; Oura, T; Shimizu, I; Shirahata, Y; Shirai, J; Suzuki, A; Tachibana, H; Tamae, K; Ueshima, K; Watanabe, H; Xu, BD; Yamauchi, Y; Yoshida, H; Kozlov, A; Takemoto, Y; Yoshida, S; Fushimi, K; Grant, C; Piepke, A; Banks, TI; Berger, BE; Freedman, SJ; Fujikawa, BK; O'Donnell, T; Learned, JG; Maricic, J; Sakai, M; Dazeley, S; Svoboda, R; Winslow, LA; Efremenko, Y; Karwowski, HJ; Markoff, DM; Tornow, W; Detwiler, JA; Enomoto, S; Decowski, MP
Published Date
- September 23, 2015
Published In
Volume / Issue
- 92 / 5
Electronic International Standard Serial Number (EISSN)
- 1550-2368
International Standard Serial Number (ISSN)
- 1550-7998
Digital Object Identifier (DOI)
- 10.1103/PhysRevD.92.052006
Citation Source
- Scopus