Neutrino Oscillation Physics

Abstract We present a global analysis of neutrino oscillation data, including in particular the high-precision measurements of the last SM mixing angle θ 13 at reactors, which have confirmed previous indications in favor of θ 13 > 0 . We focus on the correlations between θ 13 and the mixing angle θ 23 , as well as between θ 13 and the neutrino CP-violation phase δ . Assuming normal hierarchy, we find possible hints about the other two unknowns, namely: a slight preference for the first θ 23 octant, and a possible indication for non-zero CP violation (with sin δ 0 ), although at the level below 2 σ for both the two cases. Note that the second hint appears also in inverted hierarchy, but with even lower statistical significance. No palpable difference between normal and inverted mass hierarchy emerges from the data.