Atmospheric neutrino oscillation probabilities as a function of energy and cosine of the neutrino zenith angle (−1 corresponds to upward-going). The plot shows the νμ → νe probability in case of the inverted mass hierarchy or ν̄μ → ν̄e in case of the normal mass hierarchy.
Hyper-Kamiokande Collaboration (K. Abe et al.)
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"Physics potentials with the second Hyper-Kamiokande detector in Korea", PTEP 2018 (2018) 6, 063C01, Prog Theor Exp Phys (2018), <a rel="nofollow" class="external free" href="https://arxiv.org/abs/1611.06118">https://arxiv.org/abs/1611.06118</a>, <a rel="nofollow" class="external free" href="https://doi.org/10.1093/ptep/pty044">https://doi.org/10.1093/ptep/pty044</a>