Atmospheric Neutrino Oscillations in Three-Flavor Neutrinos

We analyze the atmospheric neutrino experiments of SuperKamiokande including zenith angle dependences using the three-flavor neutrino framework with the hierarchy m 2 ≈ m 2 � m 2. Taking into account the terrestrial, solar neutrino experimental data and the atmospheric neutrino experiments, including the sub-GeV and multi-GeV data in SuperKamiokande, a large angle solution in the solar neutrino experiments is favored and the range of the mass parameter ∆m 2 is restricted in the range 0.08eV 2 ‐2eV 2 . Allowed regions of mixing parameters are θ13 < 4 ◦ , 27 ◦ <θ 23 < 32 ◦ for ∆m 2 =1e V 2 and θ13 < 3 ◦ , 28 ◦ <θ 23 < 33 ◦ for ∆m 2 =0 . 1e V 2 .