Predictions from high scale mixing unification hypothesis

Abstract

We investigate the renormalization group evolution of masses and mixing angles of Majorana neutrinos under the "high scale mixing unification" hypothesis. Assuming the unification of quark-lepton mixing angles at a high scale, we show that all the experimentally observed neutrino oscillation parameters can be obtained, within the 3-σ range, through the running of corresponding renormalization group equations provided neutrinos have the same charge parity and are quasidegenerate. One of the novel results of our analysis is that θ23 turns out to be nonmaximal and lies in the second octant. Furthermore, we derive new constraints on the allowed parameter space for the unification scale, supersymmetry breaking scale and tanβ, for which the high scale mixing unification hypothesis works. © 2014 American Physical Society.