Publications [#304631] of Christopher Walter

Papers Published
  1. 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 et al., Experimental study of the atmospheric neutrino backgrounds for p→e+π0 searches in water Cherenkov detectors, Physical Review D, vol. 77 no. 3 (2008) [doi] .

    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.