Resolving the octant degeneracy by neutrino oscillation experiments

Abstract

We discuss how and to what extent the degeneracy associated with θ23, if it's not maximal, can be resolved by future oscillation experiments which utilize conventional neutrino beam from accelerator and/or reactor neutrinos.

Probing Cp Violation and Physics Beyond the Standard Model in Neutrino Oscillation by New Generation Detectors

“…This is the manifestation of the so called octant degeneracy. This degeneracy is caused by the fact that the accelerator (atmospheric) experiments in the ‹ µ ae ‹ µ channel are mainly sensible to sin 2 2◊ 23 and this leads, at first approximation, ignoring ◊ 13 , to the following 2 degenerate solutions, sin 2 ◊ 23 = (1± Ò 1 ≠ sin 2 2◊ 23 )/2 [28]. We have that for NO ◊ 23 < 45°is favoured at à 1 ‡ and for IO case ◊ 23 > 45°is favoured at à 1.8 ‡ [27].…”