Neutrino Propagation in Matter

Figure 1

Resonance in neutrino mixing. The dependence of sin²2𝜃_𝑚𝑖𝑗 on the product 𝑉𝐸 for vacuum mixing: sin²2𝜃₁₂=0.851, Δ𝑚²₂₁=7.59⋅10⁻⁵ eV² (red) and sin²𝜃₁₃=0.0241, Δ𝑚²₃₁=2.47⋅10⁻³ eV² (green). The left semiplane corresponds to antineutrinos. The behavior of 𝜃₂₃ with vacuum value sin²2𝜃₂₃=0.953 is included for completeness. The dashed lines are the predictions from a strict two-flavor approximation while the solid thin lines are the results of numerical diagonalization of the full three-flavor system. The upper panels show the case of the normal mass hierarchy and the lower panels show the inverted hierarchy.

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