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Following the recent T2K indication of a sizeable reactor angle, we present aclass of models which fix \theta_{13} while preserving trimaximal solar mixing.The models are based on a new type of constrained sequential dominanceinvolving new vacuum alignments, along the (1,2,0)^T or (1,0,2)^T directions inflavour space. We show that such alignments are easily achieved usingorthogonality, and may replace the role of the subdominant flavon alignment(1,1,1)^T in constrained sequential dominance. In such models, with a normalhierarchical spectrum, the reactor angle is related to a ratio of neutrinomasses by \theta_{13} = \frac{\sqrt{2}}{3}\frac{m^\nu_2}{m^\nu_3}, leading to\theta_{13} \sim 5^\circ - 6^\circ, while the atmospheric angle is given by thesum rule \theta_{23} \approx 45^\circ + \sqrt{2} \theta_{13} \cos \delta. Wefind that leptogenesis is unsuppressed due to the violation of form dominanceand that the CP violating phase responsible for leptogenesis is precisely equalto the Dirac CP phase \delta, providing a direct link between leptogenesis andneutrino mixing in this class of models.

Trimaximal mixing with predicted \theta_13 from a new type of constrained sequential dominance