Neutrino Oscillation Calculator

Calculate neutrino flavor oscillation probabilities

Oscillation Channel Preset:

Neutrino Energy (GeV):

Baseline Distance (km):

Δm² (eV²):

sin²(2θ):

About Neutrino Oscillations

Neutrino oscillations occur because mass eigenstates differ from flavor eigenstates. A neutrino created in one flavor can be detected as another flavor after propagation.

Two-Flavor Formula:

P(να→νβ) = sin²(2θ) × sin²(1.27 × Δm² × L/E)

Current Best-Fit Parameters:

|Δm²₃₂| ≈ 2.5 × 10⁻³ eV² (atmospheric)
Δm²₂₁ ≈ 7.5 × 10⁻⁵ eV² (solar)
sin²(2θ₁₂) ≈ 0.85, sin²(2θ₂₃) ≈ 1, sin²(2θ₁₃) ≈ 0.09

Major Experiments:

T2K, NOvA: Long-baseline accelerator
Daya Bay, JUNO: Reactor neutrinos
Super-K, IceCube: Atmospheric