Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors

S. Mine, J. L. Alcaraz, S. Andringa, S. Aoki, J. Argyriades, K. Asakura, R. Ashie, F. Berghaus, H. Berns, H. Bhang, A. Blondel, S. Borghi, J. Bouchez, J. Burguet-Castell, D. Casper, J. Catala, C. Cavata, A. Cervera, S. M. Chen, K. O. ChoJ. H. Choi, U. Dore, X. Espinal, M. Fechner, E. Fernandez, Y. Fujii, Y. Fukuda, J. Gomez-Cadenas, R. Gran, T. Hara, M. Hasegawa, T. Hasegawa, Y. Hayato, R. L. Helmer, K. Hiraide, J. Hosaka, A. K. Ichikawa, M. Iinuma, A. Ikeda, T. Ishida, K. Ishihara, T. Ishii, M. Ishitsuka, Y. Itow, T. Iwashita, H. I. Jang, E. J. Jeon, I. S. Jeong, K. K. Joo, G. Jover, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, C. O. Kim, M. Khabibullin, A. Khotjantsev, D. Kielczewska, J. Y. Kim, S. B. Kim, P. Kitching, K. Kobayashi, T. Kobayashi, A. Konaka, Yusuke Koshio, W. Kropp, Yu Kudenko, Y. Kuno, Y. Kurimoto, T. Kutter, J. Learned, S. Likhoded, I. T. Lim, P. F. Loverre, L. Ludovici, H. Maesaka, J. Mallet, C. Mariani, S. Matsuno, V. Matveev, K. McConnel, C. McGrew, S. Mikheyev, A. Minamino, O. Mineev, C. Mitsuda, M. Miura, Y. Moriguchi, S. Moriyama, T. Nakadaira, M. Nakahata, K. Nakamura, I. Nakano, T. Nakaya, S. Nakayama, T. Namba, R. Nambu, S. Nawang, K. Nishikawa, K. Nitta, F. Nova, P. Novella, Y. Obayashi, A. Okada, K. Okumura, S. M. Oser, Y. Oyama, M. Y. Pac, F. Pierre, A. Rodriguez, C. Saji, Makoto Sakuda, F. Sanchez, K. Scholberg, R. Schroeter, M. Sekiguchi, M. Shiozawa, K. Shiraishi, G. Sitjes, M. Smy, H. Sobel, M. Sorel, J. Stone, L. Sulak, A. Suzuki, Y. Suzuki, M. Tada, T. Takahashi, Y. Takenaga, Y. Takeuchi, K. Taki, Y. Takubo, N. Tamura, M. Tanaka, R. Terri, S. T'Jampens, A. Tornero-Lopez, Y. Totsuka, M. Vagins, L. Whitehead, C. W. Walter, W. Wang, R. J. Wilkes, S. Yamada, Y. Yamada, S. Yamamoto, C. Yanagisawa, N. Yershov, H. Yokoyama, M. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single π0 production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p→e+π0 background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63-0.33+0.42(stat)-0.51+0.45(syst)(megaton-year)- 1. This result is also relevant to possible future, megaton-scale water Cherenkov detectors.

Original languageEnglish
Article number032003
JournalPhysical Review D
Volume77
Issue number3
DOIs
Publication statusPublished - Feb 25 2008

Fingerprint

Cherenkov Detectors
Neutrinos
Experimental Study
neutrinos
Water
detectors
water
neutrino beams
Decay
protons
decay
Accelerator
Interaction
accelerators
Background
interactions
Imaging
rings
Ring
Energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Mine, S., Alcaraz, J. L., Andringa, S., Aoki, S., Argyriades, J., Asakura, K., ... Zalipska, J. (2008). Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors. Physical Review D, 77(3), [032003]. https://doi.org/10.1103/PhysRevD.77.032003

Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors. / Mine, S.; Alcaraz, J. L.; Andringa, S.; Aoki, S.; Argyriades, J.; Asakura, K.; Ashie, R.; Berghaus, F.; Berns, H.; Bhang, H.; Blondel, A.; Borghi, S.; Bouchez, J.; Burguet-Castell, J.; Casper, D.; Catala, J.; Cavata, C.; Cervera, A.; Chen, S. M.; Cho, K. O.; Choi, J. H.; Dore, U.; Espinal, X.; Fechner, M.; Fernandez, E.; Fujii, Y.; Fukuda, Y.; Gomez-Cadenas, J.; Gran, R.; Hara, T.; Hasegawa, M.; Hasegawa, T.; Hayato, Y.; Helmer, R. L.; Hiraide, K.; Hosaka, J.; Ichikawa, A. K.; Iinuma, M.; Ikeda, A.; Ishida, T.; Ishihara, K.; Ishii, T.; Ishitsuka, M.; Itow, Y.; Iwashita, T.; Jang, H. I.; Jeon, E. J.; Jeong, I. S.; Joo, K. K.; Jover, G.; Jung, C. K.; Kajita, T.; Kameda, J.; Kaneyuki, K.; Kato, I.; Kearns, E.; Kim, C. O.; Khabibullin, M.; Khotjantsev, A.; Kielczewska, D.; Kim, J. Y.; Kim, S. B.; Kitching, P.; Kobayashi, K.; Kobayashi, T.; Konaka, A.; Koshio, Yusuke; Kropp, W.; Kudenko, Yu; Kuno, Y.; Kurimoto, Y.; Kutter, T.; Learned, J.; Likhoded, S.; Lim, I. T.; Loverre, P. F.; Ludovici, L.; Maesaka, H.; Mallet, J.; Mariani, C.; Matsuno, S.; Matveev, V.; McConnel, K.; McGrew, C.; Mikheyev, S.; Minamino, A.; Mineev, O.; Mitsuda, C.; Miura, M.; Moriguchi, Y.; Moriyama, S.; Nakadaira, T.; Nakahata, M.; Nakamura, K.; Nakano, I.; Nakaya, T.; Nakayama, S.; Namba, T.; Nambu, R.; Nawang, S.; Nishikawa, K.; Nitta, K.; Nova, F.; Novella, P.; Obayashi, Y.; Okada, A.; Okumura, K.; Oser, S. M.; Oyama, Y.; Pac, M. Y.; Pierre, F.; Rodriguez, A.; Saji, C.; Sakuda, Makoto; Sanchez, F.; Scholberg, K.; Schroeter, R.; Sekiguchi, M.; Shiozawa, M.; Shiraishi, K.; Sitjes, G.; Smy, M.; Sobel, H.; Sorel, M.; Stone, J.; Sulak, L.; Suzuki, A.; Suzuki, Y.; Tada, M.; Takahashi, T.; Takenaga, Y.; Takeuchi, Y.; Taki, K.; Takubo, Y.; Tamura, N.; Tanaka, M.; Terri, R.; T'Jampens, S.; Tornero-Lopez, A.; Totsuka, Y.; Vagins, M.; Whitehead, L.; Walter, C. W.; Wang, W.; Wilkes, R. J.; Yamada, S.; Yamada, Y.; Yamamoto, S.; Yanagisawa, C.; Yershov, N.; Yokoyama, H.; Yokoyama, M.; Yoo, J.; Yoshida, M.; Zalipska, J.

In: Physical Review D, Vol. 77, No. 3, 032003, 25.02.2008.

Research output: Contribution to journalArticle

Mine, S, Alcaraz, JL, Andringa, S, Aoki, S, Argyriades, J, Asakura, K, Ashie, R, Berghaus, F, Berns, H, Bhang, H, Blondel, A, Borghi, S, Bouchez, J, Burguet-Castell, J, Casper, D, Catala, J, Cavata, C, Cervera, A, Chen, SM, Cho, KO, Choi, JH, Dore, U, Espinal, X, Fechner, M, Fernandez, E, Fujii, Y, Fukuda, Y, Gomez-Cadenas, J, Gran, R, Hara, T, Hasegawa, M, Hasegawa, T, Hayato, Y, Helmer, RL, Hiraide, K, Hosaka, J, Ichikawa, AK, Iinuma, M, Ikeda, A, Ishida, T, Ishihara, K, Ishii, T, Ishitsuka, M, Itow, Y, Iwashita, T, Jang, HI, Jeon, EJ, Jeong, IS, Joo, KK, Jover, G, Jung, CK, Kajita, T, Kameda, J, Kaneyuki, K, Kato, I, Kearns, E, Kim, CO, Khabibullin, M, Khotjantsev, A, Kielczewska, D, Kim, JY, Kim, SB, Kitching, P, Kobayashi, K, Kobayashi, T, Konaka, A, Koshio, Y, Kropp, W, Kudenko, Y, Kuno, Y, Kurimoto, Y, Kutter, T, Learned, J, Likhoded, S, Lim, IT, Loverre, PF, Ludovici, L, Maesaka, H, Mallet, J, Mariani, C, Matsuno, S, Matveev, V, McConnel, K, McGrew, C, Mikheyev, S, Minamino, A, Mineev, O, Mitsuda, C, Miura, M, Moriguchi, Y, Moriyama, S, Nakadaira, T, Nakahata, M, Nakamura, K, Nakano, I, Nakaya, T, Nakayama, S, Namba, T, Nambu, R, Nawang, S, Nishikawa, K, Nitta, K, Nova, F, Novella, P, Obayashi, Y, Okada, A, Okumura, K, Oser, SM, Oyama, Y, Pac, MY, Pierre, F, Rodriguez, A, Saji, C, Sakuda, M, Sanchez, F, Scholberg, K, Schroeter, R, Sekiguchi, M, Shiozawa, M, Shiraishi, K, Sitjes, G, Smy, M, Sobel, H, Sorel, M, Stone, J, Sulak, L, Suzuki, A, Suzuki, Y, Tada, M, Takahashi, T, Takenaga, Y, Takeuchi, Y, Taki, K, Takubo, Y, Tamura, N, Tanaka, M, Terri, R, T'Jampens, S, Tornero-Lopez, A, Totsuka, Y, Vagins, M, Whitehead, L, Walter, CW, Wang, W, Wilkes, RJ, Yamada, S, Yamada, Y, Yamamoto, S, Yanagisawa, C, Yershov, N, Yokoyama, H, Yokoyama, M, Yoo, J, Yoshida, M & Zalipska, J 2008, 'Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors', Physical Review D, vol. 77, no. 3, 032003. https://doi.org/10.1103/PhysRevD.77.032003
Mine, S. ; Alcaraz, J. L. ; Andringa, S. ; Aoki, S. ; Argyriades, J. ; Asakura, K. ; Ashie, R. ; Berghaus, F. ; Berns, H. ; Bhang, H. ; Blondel, A. ; Borghi, S. ; Bouchez, J. ; Burguet-Castell, J. ; Casper, D. ; Catala, J. ; Cavata, C. ; Cervera, A. ; Chen, S. M. ; Cho, K. O. ; Choi, J. H. ; Dore, U. ; Espinal, X. ; Fechner, M. ; Fernandez, E. ; Fujii, Y. ; Fukuda, Y. ; Gomez-Cadenas, J. ; Gran, R. ; Hara, T. ; Hasegawa, M. ; Hasegawa, T. ; Hayato, Y. ; Helmer, R. L. ; Hiraide, K. ; Hosaka, J. ; Ichikawa, A. K. ; Iinuma, M. ; Ikeda, A. ; Ishida, T. ; Ishihara, K. ; Ishii, T. ; Ishitsuka, M. ; Itow, Y. ; Iwashita, T. ; Jang, H. I. ; Jeon, E. J. ; Jeong, I. S. ; Joo, K. K. ; Jover, G. ; Jung, C. K. ; Kajita, T. ; Kameda, J. ; Kaneyuki, K. ; Kato, I. ; Kearns, E. ; Kim, C. O. ; Khabibullin, M. ; Khotjantsev, A. ; Kielczewska, D. ; Kim, J. Y. ; Kim, S. B. ; Kitching, P. ; Kobayashi, K. ; Kobayashi, T. ; Konaka, A. ; Koshio, Yusuke ; Kropp, W. ; Kudenko, Yu ; Kuno, Y. ; Kurimoto, Y. ; Kutter, T. ; Learned, J. ; Likhoded, S. ; Lim, I. T. ; Loverre, P. F. ; Ludovici, L. ; Maesaka, H. ; Mallet, J. ; Mariani, C. ; Matsuno, S. ; Matveev, V. ; McConnel, K. ; McGrew, C. ; Mikheyev, S. ; Minamino, A. ; Mineev, O. ; Mitsuda, C. ; Miura, M. ; Moriguchi, Y. ; Moriyama, S. ; Nakadaira, T. ; Nakahata, M. ; Nakamura, K. ; Nakano, I. ; Nakaya, T. ; Nakayama, S. ; Namba, T. ; Nambu, R. ; Nawang, S. ; Nishikawa, K. ; Nitta, K. ; Nova, F. ; Novella, P. ; Obayashi, Y. ; Okada, A. ; Okumura, K. ; Oser, S. M. ; Oyama, Y. ; Pac, M. Y. ; Pierre, F. ; Rodriguez, A. ; Saji, C. ; Sakuda, Makoto ; Sanchez, F. ; Scholberg, K. ; Schroeter, R. ; Sekiguchi, M. ; Shiozawa, M. ; Shiraishi, K. ; Sitjes, G. ; Smy, M. ; Sobel, H. ; Sorel, M. ; Stone, J. ; Sulak, L. ; Suzuki, A. ; Suzuki, Y. ; Tada, M. ; Takahashi, T. ; Takenaga, Y. ; Takeuchi, Y. ; Taki, K. ; Takubo, Y. ; Tamura, N. ; Tanaka, M. ; Terri, R. ; T'Jampens, S. ; Tornero-Lopez, A. ; Totsuka, Y. ; Vagins, M. ; Whitehead, L. ; Walter, C. W. ; Wang, W. ; Wilkes, R. J. ; Yamada, S. ; Yamada, Y. ; Yamamoto, S. ; Yanagisawa, C. ; Yershov, N. ; Yokoyama, H. ; Yokoyama, M. ; Yoo, J. ; Yoshida, M. ; Zalipska, J. / Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors. In: Physical Review D. 2008 ; Vol. 77, No. 3.
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title = "Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors",
abstract = "The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single π0 production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p→e+π0 background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63-0.33+0.42(stat)-0.51+0.45(syst)(megaton-year)- 1. This result is also relevant to possible future, megaton-scale water Cherenkov detectors.",
author = "S. Mine and Alcaraz, {J. L.} and S. Andringa and S. Aoki and J. Argyriades and K. Asakura and R. Ashie and F. Berghaus and H. Berns and H. Bhang and A. Blondel and S. Borghi and J. Bouchez and J. Burguet-Castell and D. Casper and J. Catala and C. Cavata and A. Cervera and Chen, {S. M.} and Cho, {K. O.} and Choi, {J. H.} and U. Dore and X. Espinal and M. Fechner and E. Fernandez and Y. Fujii and Y. Fukuda and J. Gomez-Cadenas and R. Gran and T. Hara and M. Hasegawa and T. Hasegawa and Y. Hayato and Helmer, {R. L.} and K. Hiraide and J. Hosaka and Ichikawa, {A. K.} and M. Iinuma and A. Ikeda and T. Ishida and K. Ishihara and T. Ishii and M. Ishitsuka and Y. Itow and T. Iwashita and Jang, {H. I.} and Jeon, {E. J.} and Jeong, {I. S.} and Joo, {K. K.} and G. Jover and Jung, {C. K.} and T. Kajita and J. Kameda and K. Kaneyuki and I. Kato and E. Kearns and Kim, {C. O.} and M. Khabibullin and A. Khotjantsev and D. Kielczewska and Kim, {J. Y.} and Kim, {S. B.} and P. Kitching and K. Kobayashi and T. Kobayashi and A. Konaka and Yusuke Koshio and W. Kropp and Yu Kudenko and Y. Kuno and Y. Kurimoto and T. Kutter and J. Learned and S. Likhoded and Lim, {I. T.} and Loverre, {P. F.} and L. Ludovici and H. Maesaka and J. Mallet and C. Mariani and S. Matsuno and V. Matveev and K. McConnel and C. McGrew and S. Mikheyev and A. Minamino and O. Mineev and C. Mitsuda and M. Miura and Y. Moriguchi and S. Moriyama and T. Nakadaira and M. Nakahata and K. Nakamura and I. Nakano and T. Nakaya and S. Nakayama and T. Namba and R. Nambu and S. Nawang and K. Nishikawa and K. Nitta and F. Nova and P. Novella and Y. Obayashi and A. Okada and K. Okumura and Oser, {S. M.} and Y. Oyama and Pac, {M. Y.} and F. Pierre and A. Rodriguez and C. Saji and Makoto Sakuda and F. Sanchez and K. Scholberg and R. Schroeter and M. Sekiguchi and M. Shiozawa and K. Shiraishi and G. Sitjes and M. Smy and H. Sobel and M. Sorel and J. Stone and L. Sulak and A. Suzuki and Y. Suzuki and M. Tada and T. Takahashi and Y. Takenaga and Y. Takeuchi and K. Taki and Y. Takubo and N. Tamura and M. Tanaka and R. Terri and S. T'Jampens and A. Tornero-Lopez and Y. Totsuka and M. Vagins and L. Whitehead and Walter, {C. W.} and W. Wang and Wilkes, {R. J.} and S. Yamada and Y. Yamada and S. Yamamoto and C. Yanagisawa and N. Yershov and H. Yokoyama and M. Yokoyama and J. Yoo and M. Yoshida and J. Zalipska",
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TY - JOUR

T1 - Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors

AU - Mine, S.

AU - Alcaraz, J. L.

AU - Andringa, S.

AU - Aoki, S.

AU - Argyriades, J.

AU - Asakura, K.

AU - Ashie, R.

AU - Berghaus, F.

AU - Berns, H.

AU - Bhang, H.

AU - Blondel, A.

AU - Borghi, S.

AU - Bouchez, J.

AU - Burguet-Castell, J.

AU - Casper, D.

AU - Catala, J.

AU - Cavata, C.

AU - Cervera, A.

AU - Chen, S. M.

AU - Cho, K. O.

AU - Choi, J. H.

AU - Dore, U.

AU - Espinal, X.

AU - Fechner, M.

AU - Fernandez, E.

AU - Fujii, Y.

AU - Fukuda, Y.

AU - Gomez-Cadenas, J.

AU - Gran, R.

AU - Hara, T.

AU - Hasegawa, M.

AU - Hasegawa, T.

AU - Hayato, Y.

AU - Helmer, R. L.

AU - Hiraide, K.

AU - Hosaka, J.

AU - Ichikawa, A. K.

AU - Iinuma, M.

AU - Ikeda, A.

AU - Ishida, T.

AU - Ishihara, K.

AU - Ishii, T.

AU - Ishitsuka, M.

AU - Itow, Y.

AU - Iwashita, T.

AU - Jang, H. I.

AU - Jeon, E. J.

AU - Jeong, I. S.

AU - Joo, K. K.

AU - Jover, G.

AU - Jung, C. K.

AU - Kajita, T.

AU - Kameda, J.

AU - Kaneyuki, K.

AU - Kato, I.

AU - Kearns, E.

AU - Kim, C. O.

AU - Khabibullin, M.

AU - Khotjantsev, A.

AU - Kielczewska, D.

AU - Kim, J. Y.

AU - Kim, S. B.

AU - Kitching, P.

AU - Kobayashi, K.

AU - Kobayashi, T.

AU - Konaka, A.

AU - Koshio, Yusuke

AU - Kropp, W.

AU - Kudenko, Yu

AU - Kuno, Y.

AU - Kurimoto, Y.

AU - Kutter, T.

AU - Learned, J.

AU - Likhoded, S.

AU - Lim, I. T.

AU - Loverre, P. F.

AU - Ludovici, L.

AU - Maesaka, H.

AU - Mallet, J.

AU - Mariani, C.

AU - Matsuno, S.

AU - Matveev, V.

AU - McConnel, K.

AU - McGrew, C.

AU - Mikheyev, S.

AU - Minamino, A.

AU - Mineev, O.

AU - Mitsuda, C.

AU - Miura, M.

AU - Moriguchi, Y.

AU - Moriyama, S.

AU - Nakadaira, T.

AU - Nakahata, M.

AU - Nakamura, K.

AU - Nakano, I.

AU - Nakaya, T.

AU - Nakayama, S.

AU - Namba, T.

AU - Nambu, R.

AU - Nawang, S.

AU - Nishikawa, K.

AU - Nitta, K.

AU - Nova, F.

AU - Novella, P.

AU - Obayashi, Y.

AU - Okada, A.

AU - Okumura, K.

AU - Oser, S. M.

AU - Oyama, Y.

AU - Pac, M. Y.

AU - Pierre, F.

AU - Rodriguez, A.

AU - Saji, C.

AU - Sakuda, Makoto

AU - Sanchez, F.

AU - Scholberg, K.

AU - Schroeter, R.

AU - Sekiguchi, M.

AU - Shiozawa, M.

AU - Shiraishi, K.

AU - Sitjes, G.

AU - Smy, M.

AU - Sobel, H.

AU - Sorel, M.

AU - Stone, J.

AU - Sulak, L.

AU - Suzuki, A.

AU - Suzuki, Y.

AU - Tada, M.

AU - Takahashi, T.

AU - Takenaga, Y.

AU - Takeuchi, Y.

AU - Taki, K.

AU - Takubo, Y.

AU - Tamura, N.

AU - Tanaka, M.

AU - Terri, R.

AU - T'Jampens, S.

AU - Tornero-Lopez, A.

AU - Totsuka, Y.

AU - Vagins, M.

AU - Whitehead, L.

AU - Walter, C. W.

AU - Wang, W.

AU - Wilkes, R. J.

AU - Yamada, S.

AU - Yamada, Y.

AU - Yamamoto, S.

AU - Yanagisawa, C.

AU - Yershov, N.

AU - Yokoyama, H.

AU - Yokoyama, M.

AU - Yoo, J.

AU - Yoshida, M.

AU - Zalipska, J.

PY - 2008/2/25

Y1 - 2008/2/25

N2 - The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single π0 production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p→e+π0 background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63-0.33+0.42(stat)-0.51+0.45(syst)(megaton-year)- 1. This result is also relevant to possible future, megaton-scale water Cherenkov detectors.

AB - The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single π0 production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p→e+π0 background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63-0.33+0.42(stat)-0.51+0.45(syst)(megaton-year)- 1. This result is also relevant to possible future, megaton-scale water Cherenkov detectors.

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UR - http://www.scopus.com/inward/citedby.url?scp=41049114718&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.77.032003

DO - 10.1103/PhysRevD.77.032003

M3 - Article

AN - SCOPUS:41049114718

VL - 77

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 3

M1 - 032003

ER -