Method for Determination of |Uₑ₃| in Neutrino Oscillation Appearance Experiments

الأصل · EN

We point out that determination of the MNS matrix element |Uₑ₃| = s₁₃ in long-baseline νμ → νₑ neutrino oscillation experiments suffers from large intrinsic uncertainty due to the unknown CP violating phase δand sign of Δm²₁₃. We propose a new strategy for accurate determination of θ₁₃; tune the beam energy at the oscillation maximum and do the measurement both in neutrino and antineutrino channels. We show that it automatically resolves the problem of parameter ambiguities which involves δ, θ₁₃, and the sign of Δm²₁₃.