New plots and parameter degeneracies in neutrino oscillations
نویسنده
چکیده
Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan (Dated: May 3, 2004) Abstract It is shown that eightfold degeneracy in neutrino oscillations is easily seen by plotting constant probabilities in the (sin 2θ13, 1/s 2 23) plane. Using this plot, we discuss how an additional long baseline measurement resolves degeneracies after the JPARC experiment measures the oscillation probabilities P (νμ → νe) and P (ν̄μ → ν̄e) at |∆m31|L/4E = π/2. By measuring P (νμ → νe) or P (ν̄μ → ν̄e), the sgn(∆m31) ambiguity is resolved better at longer baselines and the δ ↔ π − δ ambiguity is resolved better when ∣ |∆m31|L/4E − π/2 ∣
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