Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-02-26
Phys.Lett.B413:109-113,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, LaTeX, no figures
Scientific paper
10.1016/S0370-2693(97)01094-0
The minimal interpretation of the atmospheric neutrino data suggests that the muon neutrino oscillates into another species with a mixing angle close to the maximal $\pi/4$. In the Exact Parity Symmetric Model, both the muon and electron neutrinos are expected to be maximally mixed with essentially sterile partners ($\nu'_{\mu}$ and $\nu'_e$ respectively). We examine the impact of maximal $\nu_e - \nu'_e$ oscillations on the atmospheric neutrino experiments. We estimate that maximal $\nu_e - \nu'_e$ oscillations will have effects on atmospheric neutrino data for $|\delta m^2 (\nu_e - \nu_e')| > 7 \times 10^{-5} eV^2$. For $\delta m^2$ in this range, a slight but distinctive rise in the ratio of muon-like to electron-like events is predicted for the low-energy sample. Furthermore, the ratio of low-energy electron-like events with zenith angles less than $90\deg$ to those with zenith angles greater than $90\deg$ should be greater than 1.
Bunn Julian J.
Foot Robert
Volkas Raymond R.
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