Tri-bimaximal-Cabibbo mixing

Recent measurements of the lepton mixing angle θ13 by the Daya Bay and RENO reactor experiments are consistent with the relationship θ13≈θC/2 where θC is the Cabibbo angle. We propose Tri-Bimaximal-Cabibbo (TBC) mixing, in which sinθ13=sinθC/2, sinθ23=1/2 and sinθ12=1/3. We show that TBC mixing may arise approximately from tri-bimaximal, bi-maximal or Golden Ratio neutrino mixing, together with Cabibbo-like charged lepton corrections arising from a Pati-Salam gauge group, leading to predictions for the CP-violating phase of δ≈±90°,±180°,±75°, respectively. Alternatively, we show that TBC neutrino mixing may realised accurately using the type I see-saw mechanism with partially constrained sequential right-handed neutrino dominance, assuming a family symmetry which is broken by a flavon common to quarks and neutrinos.