Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector

H. Nishino, S. Clark, K. Abe, Y. Hayato, T. Iida, M. Ikeda, J. Kameda, K. Kobayashi, Yusuke Koshio, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, Y. Obayashi, H. Ogawa, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takenaga & 92 others Y. Takeuchi, K. Ueno, K. Ueshima, H. Watanabe, S. Yamada, S. Hazama, I. Higuchi, C. Ishihara, T. Kajita, K. Kaneyuki, G. Mitsuka, K. Okumura, N. Tanimoto, M. R. Vagins, F. Dufour, E. Kearns, M. Litos, J. L. Raaf, J. L. Stone, L. R. Sulak, W. Wang, M. Goldhaber, S. Dazeley, R. Svoboda, K. Bays, D. Casper, J. P. Cravens, W. R. Kropp, S. Mine, C. Regis, M. B. Smy, H. W. Sobel, K. S. Ganezer, J. Hill, W. E. Keig, J. S. Jang, J. Y. Kim, I. T. Lim, M. Fechner, K. Scholberg, C. W. Walter, R. Wendell, S. Tasaka, J. G. Learned, S. Matsuno, Y. Watanabe, T. Hasegawa, T. Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, K. Nishikawa, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. T. Suzuki, A. Minamino, T. Nakaya, M. Yokoyama, Y. Fukuda, Y. Itow, T. Tanaka, C. K. Jung, G. Lopez, C. McGrew, R. Terri, C. Yanagisawa, N. Tamura, Y. Idehara, Makoto Sakuda, Y. Kuno, M. Yoshida, S. B. Kim, B. S. Yang, T. Ishizuka, H. Okazawa, Y. Choi, H. K. Seo, Y. Furuse, K. Nishijima, Y. Yokosawa, M. Koshiba, Y. Totsuka, S. Chen, Y. Heng, Z. Yang, H. Zhang, D. Kielczewska, E. Thrane, R. J. Wilkes

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

We have searched for proton decays via p→e+π0 and p→μ+π0 using data from a 91.7kt•yr exposure of Super-Kamiokande-I and a 49.2kt•yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2×1033 and 6.6×1033 years at 90% confidence level for p→e+π0 and p→μ+π0 modes, respectively.

Original languageEnglish
Article number141801
JournalPhysical Review Letters
Volume102
Issue number14
DOIs
Publication statusPublished - Apr 6 2009

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protons
detectors
decay
water
confidence
neutrinos
life (durability)

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nishino, H., Clark, S., Abe, K., Hayato, Y., Iida, T., Ikeda, M., ... Wilkes, R. J. (2009). Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector. Physical Review Letters, 102(14), [141801]. https://doi.org/10.1103/PhysRevLett.102.141801

Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector. / Nishino, H.; Clark, S.; Abe, K.; Hayato, Y.; Iida, T.; Ikeda, M.; Kameda, J.; Kobayashi, K.; Koshio, Yusuke; Miura, M.; Moriyama, S.; Nakahata, M.; Nakayama, S.; Obayashi, Y.; Ogawa, H.; Sekiya, H.; Shiozawa, M.; Suzuki, Y.; Takeda, A.; Takenaga, Y.; Takeuchi, Y.; Ueno, K.; Ueshima, K.; Watanabe, H.; Yamada, S.; Hazama, S.; Higuchi, I.; Ishihara, C.; Kajita, T.; Kaneyuki, K.; Mitsuka, G.; Okumura, K.; Tanimoto, N.; Vagins, M. R.; Dufour, F.; Kearns, E.; Litos, M.; Raaf, J. L.; Stone, J. L.; Sulak, L. R.; Wang, W.; Goldhaber, M.; Dazeley, S.; Svoboda, R.; Bays, K.; Casper, D.; Cravens, J. P.; Kropp, W. R.; Mine, S.; Regis, C.; Smy, M. B.; Sobel, H. W.; Ganezer, K. S.; Hill, J.; Keig, W. E.; Jang, J. S.; Kim, J. Y.; Lim, I. T.; Fechner, M.; Scholberg, K.; Walter, C. W.; Wendell, R.; Tasaka, S.; Learned, J. G.; Matsuno, S.; Watanabe, Y.; Hasegawa, T.; Ishida, T.; Ishii, T.; Kobayashi, T.; Nakadaira, T.; Nakamura, K.; Nishikawa, K.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.; Suzuki, A. T.; Minamino, A.; Nakaya, T.; Yokoyama, M.; Fukuda, Y.; Itow, Y.; Tanaka, T.; Jung, C. K.; Lopez, G.; McGrew, C.; Terri, R.; Yanagisawa, C.; Tamura, N.; Idehara, Y.; Sakuda, Makoto; Kuno, Y.; Yoshida, M.; Kim, S. B.; Yang, B. S.; Ishizuka, T.; Okazawa, H.; Choi, Y.; Seo, H. K.; Furuse, Y.; Nishijima, K.; Yokosawa, Y.; Koshiba, M.; Totsuka, Y.; Chen, S.; Heng, Y.; Yang, Z.; Zhang, H.; Kielczewska, D.; Thrane, E.; Wilkes, R. J.

In: Physical Review Letters, Vol. 102, No. 14, 141801, 06.04.2009.

Research output: Contribution to journalArticle

Nishino, H, Clark, S, Abe, K, Hayato, Y, Iida, T, Ikeda, M, Kameda, J, Kobayashi, K, Koshio, Y, Miura, M, Moriyama, S, Nakahata, M, Nakayama, S, Obayashi, Y, Ogawa, H, Sekiya, H, Shiozawa, M, Suzuki, Y, Takeda, A, Takenaga, Y, Takeuchi, Y, Ueno, K, Ueshima, K, Watanabe, H, Yamada, S, Hazama, S, Higuchi, I, Ishihara, C, Kajita, T, Kaneyuki, K, Mitsuka, G, Okumura, K, Tanimoto, N, Vagins, MR, Dufour, F, Kearns, E, Litos, M, Raaf, JL, Stone, JL, Sulak, LR, Wang, W, Goldhaber, M, Dazeley, S, Svoboda, R, Bays, K, Casper, D, Cravens, JP, Kropp, WR, Mine, S, Regis, C, Smy, MB, Sobel, HW, Ganezer, KS, Hill, J, Keig, WE, Jang, JS, Kim, JY, Lim, IT, Fechner, M, Scholberg, K, Walter, CW, Wendell, R, Tasaka, S, Learned, JG, Matsuno, S, Watanabe, Y, Hasegawa, T, Ishida, T, Ishii, T, Kobayashi, T, Nakadaira, T, Nakamura, K, Nishikawa, K, Oyama, Y, Sakashita, K, Sekiguchi, T, Tsukamoto, T, Suzuki, AT, Minamino, A, Nakaya, T, Yokoyama, M, Fukuda, Y, Itow, Y, Tanaka, T, Jung, CK, Lopez, G, McGrew, C, Terri, R, Yanagisawa, C, Tamura, N, Idehara, Y, Sakuda, M, Kuno, Y, Yoshida, M, Kim, SB, Yang, BS, Ishizuka, T, Okazawa, H, Choi, Y, Seo, HK, Furuse, Y, Nishijima, K, Yokosawa, Y, Koshiba, M, Totsuka, Y, Chen, S, Heng, Y, Yang, Z, Zhang, H, Kielczewska, D, Thrane, E & Wilkes, RJ 2009, 'Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector', Physical Review Letters, vol. 102, no. 14, 141801. https://doi.org/10.1103/PhysRevLett.102.141801
Nishino, H. ; Clark, S. ; Abe, K. ; Hayato, Y. ; Iida, T. ; Ikeda, M. ; Kameda, J. ; Kobayashi, K. ; Koshio, Yusuke ; Miura, M. ; Moriyama, S. ; Nakahata, M. ; Nakayama, S. ; Obayashi, Y. ; Ogawa, H. ; Sekiya, H. ; Shiozawa, M. ; Suzuki, Y. ; Takeda, A. ; Takenaga, Y. ; Takeuchi, Y. ; Ueno, K. ; Ueshima, K. ; Watanabe, H. ; Yamada, S. ; Hazama, S. ; Higuchi, I. ; Ishihara, C. ; Kajita, T. ; Kaneyuki, K. ; Mitsuka, G. ; Okumura, K. ; Tanimoto, N. ; Vagins, M. R. ; Dufour, F. ; Kearns, E. ; Litos, M. ; Raaf, J. L. ; Stone, J. L. ; Sulak, L. R. ; Wang, W. ; Goldhaber, M. ; Dazeley, S. ; Svoboda, R. ; Bays, K. ; Casper, D. ; Cravens, J. P. ; Kropp, W. R. ; Mine, S. ; Regis, C. ; Smy, M. B. ; Sobel, H. W. ; Ganezer, K. S. ; Hill, J. ; Keig, W. E. ; Jang, J. S. ; Kim, J. Y. ; Lim, I. T. ; Fechner, M. ; Scholberg, K. ; Walter, C. W. ; Wendell, R. ; Tasaka, S. ; Learned, J. G. ; Matsuno, S. ; Watanabe, Y. ; Hasegawa, T. ; Ishida, T. ; Ishii, T. ; Kobayashi, T. ; Nakadaira, T. ; Nakamura, K. ; Nishikawa, K. ; Oyama, Y. ; Sakashita, K. ; Sekiguchi, T. ; Tsukamoto, T. ; Suzuki, A. T. ; Minamino, A. ; Nakaya, T. ; Yokoyama, M. ; Fukuda, Y. ; Itow, Y. ; Tanaka, T. ; Jung, C. K. ; Lopez, G. ; McGrew, C. ; Terri, R. ; Yanagisawa, C. ; Tamura, N. ; Idehara, Y. ; Sakuda, Makoto ; Kuno, Y. ; Yoshida, M. ; Kim, S. B. ; Yang, B. S. ; Ishizuka, T. ; Okazawa, H. ; Choi, Y. ; Seo, H. K. ; Furuse, Y. ; Nishijima, K. ; Yokosawa, Y. ; Koshiba, M. ; Totsuka, Y. ; Chen, S. ; Heng, Y. ; Yang, Z. ; Zhang, H. ; Kielczewska, D. ; Thrane, E. ; Wilkes, R. J. / Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector. In: Physical Review Letters. 2009 ; Vol. 102, No. 14.
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abstract = "We have searched for proton decays via p→e+π0 and p→μ+π0 using data from a 91.7kt•yr exposure of Super-Kamiokande-I and a 49.2kt•yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2×1033 and 6.6×1033 years at 90{\%} confidence level for p→e+π0 and p→μ+π0 modes, respectively.",
author = "H. Nishino and S. Clark and K. Abe and Y. Hayato and T. Iida and M. Ikeda and J. Kameda and K. Kobayashi and Yusuke Koshio and M. Miura and S. Moriyama and M. Nakahata and S. Nakayama and Y. Obayashi and H. Ogawa and H. Sekiya and M. Shiozawa and Y. Suzuki and A. Takeda and Y. Takenaga and Y. Takeuchi and K. Ueno and K. Ueshima and H. Watanabe and S. Yamada and S. Hazama and I. Higuchi and C. Ishihara and T. Kajita and K. Kaneyuki and G. Mitsuka and K. Okumura and N. Tanimoto and Vagins, {M. R.} and F. Dufour and E. Kearns and M. Litos and Raaf, {J. L.} and Stone, {J. L.} and Sulak, {L. R.} and W. Wang and M. Goldhaber and S. Dazeley and R. Svoboda and K. Bays and D. Casper and Cravens, {J. P.} and Kropp, {W. R.} and S. Mine and C. Regis and Smy, {M. B.} and Sobel, {H. W.} and Ganezer, {K. S.} and J. Hill and Keig, {W. E.} and Jang, {J. S.} and Kim, {J. Y.} and Lim, {I. T.} and M. Fechner and K. Scholberg and Walter, {C. W.} and R. Wendell and S. Tasaka and Learned, {J. G.} and S. Matsuno and Y. Watanabe and T. Hasegawa and T. Ishida and T. Ishii and T. Kobayashi and T. Nakadaira and K. Nakamura and K. Nishikawa and Y. Oyama and K. Sakashita and T. Sekiguchi and T. Tsukamoto and Suzuki, {A. T.} and A. Minamino and T. Nakaya and M. Yokoyama and Y. Fukuda and Y. Itow and T. Tanaka and Jung, {C. K.} and G. Lopez and C. McGrew and R. Terri and C. Yanagisawa and N. Tamura and Y. Idehara and Makoto Sakuda and Y. Kuno and M. Yoshida and Kim, {S. B.} and Yang, {B. S.} and T. Ishizuka and H. Okazawa and Y. Choi and Seo, {H. K.} and Y. Furuse and K. Nishijima and Y. Yokosawa and M. Koshiba and Y. Totsuka and S. Chen and Y. Heng and Z. Yang and H. Zhang and D. Kielczewska and E. Thrane and Wilkes, {R. J.}",
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TY - JOUR

T1 - Search for proton decay via p→e+π0 and p→μ+π0 in a large water cherenkov detector

AU - Nishino, H.

AU - Clark, S.

AU - Abe, K.

AU - Hayato, Y.

AU - Iida, T.

AU - Ikeda, M.

AU - Kameda, J.

AU - Kobayashi, K.

AU - Koshio, Yusuke

AU - Miura, M.

AU - Moriyama, S.

AU - Nakahata, M.

AU - Nakayama, S.

AU - Obayashi, Y.

AU - Ogawa, H.

AU - Sekiya, H.

AU - Shiozawa, M.

AU - Suzuki, Y.

AU - Takeda, A.

AU - Takenaga, Y.

AU - Takeuchi, Y.

AU - Ueno, K.

AU - Ueshima, K.

AU - Watanabe, H.

AU - Yamada, S.

AU - Hazama, S.

AU - Higuchi, I.

AU - Ishihara, C.

AU - Kajita, T.

AU - Kaneyuki, K.

AU - Mitsuka, G.

AU - Okumura, K.

AU - Tanimoto, N.

AU - Vagins, M. R.

AU - Dufour, F.

AU - Kearns, E.

AU - Litos, M.

AU - Raaf, J. L.

AU - Stone, J. L.

AU - Sulak, L. R.

AU - Wang, W.

AU - Goldhaber, M.

AU - Dazeley, S.

AU - Svoboda, R.

AU - Bays, K.

AU - Casper, D.

AU - Cravens, J. P.

AU - Kropp, W. R.

AU - Mine, S.

AU - Regis, C.

AU - Smy, M. B.

AU - Sobel, H. W.

AU - Ganezer, K. S.

AU - Hill, J.

AU - Keig, W. E.

AU - Jang, J. S.

AU - Kim, J. Y.

AU - Lim, I. T.

AU - Fechner, M.

AU - Scholberg, K.

AU - Walter, C. W.

AU - Wendell, R.

AU - Tasaka, S.

AU - Learned, J. G.

AU - Matsuno, S.

AU - Watanabe, Y.

AU - Hasegawa, T.

AU - Ishida, T.

AU - Ishii, T.

AU - Kobayashi, T.

AU - Nakadaira, T.

AU - Nakamura, K.

AU - Nishikawa, K.

AU - Oyama, Y.

AU - Sakashita, K.

AU - Sekiguchi, T.

AU - Tsukamoto, T.

AU - Suzuki, A. T.

AU - Minamino, A.

AU - Nakaya, T.

AU - Yokoyama, M.

AU - Fukuda, Y.

AU - Itow, Y.

AU - Tanaka, T.

AU - Jung, C. K.

AU - Lopez, G.

AU - McGrew, C.

AU - Terri, R.

AU - Yanagisawa, C.

AU - Tamura, N.

AU - Idehara, Y.

AU - Sakuda, Makoto

AU - Kuno, Y.

AU - Yoshida, M.

AU - Kim, S. B.

AU - Yang, B. S.

AU - Ishizuka, T.

AU - Okazawa, H.

AU - Choi, Y.

AU - Seo, H. K.

AU - Furuse, Y.

AU - Nishijima, K.

AU - Yokosawa, Y.

AU - Koshiba, M.

AU - Totsuka, Y.

AU - Chen, S.

AU - Heng, Y.

AU - Yang, Z.

AU - Zhang, H.

AU - Kielczewska, D.

AU - Thrane, E.

AU - Wilkes, R. J.

PY - 2009/4/6

Y1 - 2009/4/6

N2 - We have searched for proton decays via p→e+π0 and p→μ+π0 using data from a 91.7kt•yr exposure of Super-Kamiokande-I and a 49.2kt•yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2×1033 and 6.6×1033 years at 90% confidence level for p→e+π0 and p→μ+π0 modes, respectively.

AB - We have searched for proton decays via p→e+π0 and p→μ+π0 using data from a 91.7kt•yr exposure of Super-Kamiokande-I and a 49.2kt•yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2×1033 and 6.6×1033 years at 90% confidence level for p→e+π0 and p→μ+π0 modes, respectively.

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DO - 10.1103/PhysRevLett.102.141801

M3 - Article

VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

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