Physics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvd..57.6594o&link_type=abstract
Physical Review D (Particles and Fields), Volume 57, Issue 11, 1 June 1998, pp.R6594-R6598
Physics
6
Neutrino Mass And Mixing
Scientific paper
The possibility of neutrino oscillations using high-energy atmospheric neutrinos are reconsidered. High-energy (>10 GeV) electron events from atmospheric electron neutrinos are drastically enhanced in the case of νe<-->νμ oscillation. This should be compared to the conventional neutrino oscillation analysis, in which only disappearance of upward-going muons was examined. Constraints for νe<-->νμ oscillation are calculated, using data of the Kamiokande experiment. The resulting 90% C.L. upper limits on the neutrino oscillation parameters, Δm2 and sin22θ, are Δm2<5.6×10-3 eV2 for sin22θ=1 and sin22θ<0.60 for large Δm2, respectively. This result excludes most of the allowed region for the νe<-->νμ oscillation, which was obtained from a recent sub-GeV and multi-GeV atmospheric neutrino analysis.
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