Leptonic $CP$ violating Phase in the Yukawaon Model

Abstract

In the so-called "Yukawaon" model, the (effective) Yukawa coupling constants $Y_f^{eff}$ are given by vacuum expectation values (VEVs) of scalars $Y_f$ (Yukawaons) with $3\times 3$ components. In this brief report, we change VEV forms $<Y_f>$ in the previous paper into a unified form. Therefore, parameter fitting for quark and lepton masses and mixings is revised. Especially, we obtain predicted values of neutrino mixing ${\sin }^{2}2{\theta }_{13}$ and a leptonic $CP$ violating phase ${\delta }_{CP}^{\ell }$ which are consistent with the observed curve in the $({\sin }^{2}2{\theta }_{13},{\delta }_{CP}^{\ell })$ reported by T2K group recently.

Comments: 9 pages, 3 figures. Accepted version by PRD. arXiv admin note: text overlap with arXiv:1405.0069