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Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al

Publication ,  Journal Article
Asakura, K; Gando, A; Gando, Y; Hachiya, T; Hayashida, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Ishikawa, T; Ishio, S; Koga, M; Matsuda, R ...
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology
September 23, 2015

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.

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Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

EISSN

1550-2368

ISSN

1550-7998

Publication Date

September 23, 2015

Volume

92

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., … Decowski, M. P. (2015). Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al. Physical Review D - Particles, Fields, Gravitation and Cosmology, 92(5). https://doi.org/10.1103/PhysRevD.92.052006
Asakura, K., A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, et al. “Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al.” Physical Review D - Particles, Fields, Gravitation and Cosmology 92, no. 5 (September 23, 2015). https://doi.org/10.1103/PhysRevD.92.052006.
Asakura K, Gando A, Gando Y, Hachiya T, Hayashida S, Ikeda H, et al. Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 Sep 23;92(5).
Asakura, K., et al. “Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al.” Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 92, no. 5, Sept. 2015. Scopus, doi:10.1103/PhysRevD.92.052006.
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. Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 Sep 23;92(5).

Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

EISSN

1550-2368

ISSN

1550-7998

Publication Date

September 23, 2015

Volume

92

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences