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

K. Asakura; A. Gando; Y. Gando; T. Hachiya; S. Hayashida; H. Ikeda; K. Inoue; K. Ishidoshiro; T. Ishikawa; S. Ishio; M. Koga; R. Matsuda; S. Matsuda; T. Mitsui; D. Motoki; K. Nakamura; S. Obara; Y. Oki; T. Oura; I. Shimizu; Y. Shirahata; J. Shirai; A. Suzuki; H. Tachibana; K. Tamae; K. Ueshima; H. Watanabe; B. D. Xu; Y. Yamauchi; H. Yoshida; A. Kozlov; Y. Takemoto; S. Yoshida; K. Fushimi; C. Grant; A. Piepke; T. I. Banks; B. E. Berger; S. J. Freedman; B. K. Fujikawa; T. O'Donnell; J. G. Learned; J. Maricic; M. Sakai; S. Dazeley; R. Svoboda; L. A. Winslow; Y. Efremenko; H. J. Karwowski; D. M. Markoff; W. Tornow; J. A. Detwiler; S. Enomoto; M. P. Decowski

doi:10.1103/PhysRevD.92.052006

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

K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, Y. Oki, T. Oura, I. ShimizuY. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, C. Grant, A. Piepke, T. I. Banks, B. E. Berger, S. J. Freedman, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, S. Dazeley, R. Svoboda, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

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Abstract

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.

Original language	English (US)
Article number	052006
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	92
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.92.052006
State	Published - Sep 23 2015
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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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., ... 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), Article 052006. https://doi.org/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 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, vol. 92, no. 5, 052006. https://doi.org/10.1103/PhysRevD.92.052006

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

abstract = "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.",

author = "K. Asakura and A. Gando and Y. Gando and T. Hachiya and S. Hayashida and H. Ikeda and K. Inoue and K. Ishidoshiro and T. Ishikawa and S. Ishio and M. Koga and R. Matsuda and S. Matsuda and T. Mitsui and D. Motoki and K. Nakamura and S. Obara and Y. Oki and T. Oura and I. Shimizu and Y. Shirahata and J. Shirai and A. Suzuki and H. Tachibana and K. Tamae and K. Ueshima and H. Watanabe and Xu, {B. D.} and Y. Yamauchi and H. Yoshida and A. Kozlov and Y. Takemoto and S. Yoshida and K. Fushimi and C. Grant and A. Piepke and Banks, {T. I.} and Berger, {B. E.} and Freedman, {S. J.} and Fujikawa, {B. K.} and T. O'Donnell and Learned, {J. G.} and J. Maricic and M. Sakai and S. Dazeley and R. Svoboda and Winslow, {L. A.} and Y. Efremenko and Karwowski, {H. J.} and Markoff, {D. M.} and W. Tornow and Detwiler, {J. A.} and S. Enomoto and Decowski, {M. P.}",

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doi = "10.1103/PhysRevD.92.052006",

language = "English (US)",

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T1 - Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al

AU - Asakura, K.

AU - Gando, A.

AU - Gando, Y.

AU - Hachiya, T.

AU - Hayashida, S.

AU - Ikeda, H.

AU - Inoue, K.

AU - Ishidoshiro, K.

AU - Ishikawa, T.

AU - Ishio, S.

AU - Koga, M.

AU - Matsuda, R.

AU - Matsuda, S.

AU - Mitsui, T.

AU - Motoki, D.

AU - Nakamura, K.

AU - Obara, S.

AU - Oki, Y.

AU - Oura, T.

AU - Shimizu, I.

AU - Shirahata, Y.

AU - Shirai, J.

AU - Suzuki, A.

AU - Tachibana, H.

AU - Tamae, K.

AU - Ueshima, K.

AU - Watanabe, H.

AU - Xu, B. D.

AU - Yamauchi, Y.

AU - Yoshida, H.

AU - Kozlov, A.

AU - Takemoto, Y.

AU - Yoshida, S.

AU - Fushimi, K.

AU - Grant, C.

AU - Piepke, A.

AU - Banks, T. I.

AU - Berger, B. E.

AU - Freedman, S. J.

AU - Fujikawa, B. K.

AU - O'Donnell, T.

AU - Learned, J. G.

AU - Maricic, J.

AU - Sakai, M.

AU - Dazeley, S.

AU - Svoboda, R.

AU - Winslow, L. A.

AU - Efremenko, Y.

AU - Karwowski, H. J.

AU - Markoff, D. M.

AU - Tornow, W.

AU - Detwiler, J. A.

AU - Enomoto, S.

AU - Decowski, M. P.

PY - 2015/9/23

Y1 - 2015/9/23

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevD.92.052006

DO - 10.1103/PhysRevD.92.052006

M3 - Article

AN - SCOPUS:84943786158

SN - 1550-7998

VL - 92

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 5

M1 - 052006

ER -

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

Abstract

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