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Super-Kamiokande atmospheric neutrino results

Toshiyuki Toshito, the Super-Kamiokande collaboration

hep-exarXiv:hep-ex/0105023

Abstract

We present atmospheric neutrino results from a 79 kiloton year (1289 days) exposure of the Super-Kamiokande detector. Our data are well explained by νμ ντ 2-flavor oscillations. We have been attempting to discriminate between the possible oscillating partners of the muon neutrino as being either the tau neutrino or the sterile neutrino. Pure νμνs oscillation is disfavored at 99% C.L.. Moreover, we performed the appearance search for charged current tau neutrino interactions in the upward-going samples. Our data is consistent with ντ appearance at roughly the two-sigma level.

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