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; Y. Koshio; M. Miura; S. Moriyama; M. Nakahata; S. Nakayama; Y. Obayashi; H. Ogawa; H. Sekiya; M. Shiozawa; Y. Suzuki; A. Takeda; Y. Takenaga; 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; M. 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

doi:10.1103/PhysRevLett.102.141801

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, Y. Koshio, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, Y. Obayashi, H. Ogawa, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. TakenagaY. 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, M. 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 Center for Neutrino Science (RCNS)

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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.

Original language	English
Article number	141801
Journal	Physical Review Letters
Volume	102
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.102.141801
Publication status	Published - 2009 Apr 6

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10.1103/PhysRevLett.102.141801

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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., ... 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), Article 141801. https://doi.org/10.1103/PhysRevLett.102.141801

@article{ad793b9113b24b99b5762132d03a2df4,

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

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 Y. 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 M. 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.}",

year = "2009",

month = apr,

day = "6",

doi = "10.1103/PhysRevLett.102.141801",

language = "English",

volume = "102",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "14",

}

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

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, Y.

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, M.

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.

UR - http://www.scopus.com/inward/record.url?scp=65549093339&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=65549093339&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.102.141801

DO - 10.1103/PhysRevLett.102.141801

M3 - Article

AN - SCOPUS:65549093339

SN - 0031-9007

VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 141801

ER -

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

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