Key points are not available for this paper at this time.
The binary tetrahedral group (Formula: see text) has provided the most successful flavor symmetry in understanding simultaneously the three mixing angles both for quarks in the CKM matrix and for neutrinos in the PMNS matrix. One prediction, invariant under leptonic CP violation, relates the atmospheric and reactor neutrino mixings Formula: see text and Formula: see text, respectively. We study sedulously this relation using the latest neutrino data. It is natural to focus on the frustrating experimental octant ambiguity of Formula: see text. We conclude that the flavor symmetry requires that Formula: see text is in the second octant Formula: see text, not in the first one Formula: see text, and eagerly await experimental confirmation of this prediction.
Frampton et al. (Thu,) studied this question.