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


Journal Article

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. © 2008 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • 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

Published Date

  • February 25, 2008

Published In

Volume / Issue

  • 77 / 3

Electronic International Standard Serial Number (EISSN)

  • 1550-2368

International Standard Serial Number (ISSN)

  • 1550-7998

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.77.032003

Citation Source

  • Scopus