Neutrinos are produced in flavor eigenstates (νₑ, νμ, ντ) but propagate as mass eigenstates. The quantum mixing causes flavor probabilities to oscillate as a function of distance.
P(νₑ)
P(νμ)
P(ντ)
P(νₑ) at cursor:—
P(νμ) at cursor:—
P(ντ) at cursor:—
P(α→β) = |Σⱼ U*αⱼ Uβⱼ e^{-im²ⱼL/2E}|²
U = PMNS mixing matrix
Real θ₁₂≈34°, θ₁₃≈9°, θ₂₃≈49°