Realization of the minimal extended seesaw mechanism and the TM2 type neutrino mixing

We construct a neutrino mass model based on the flavour symmetry group A(4) x C-4 x C-6 x C-2 which accommodates a light sterile neutrino in the minimal extended seesaw (MES) scheme. Besides the flavour symmetry, we introduce a U(1) gauge symmetry in the sterile sector and also impose CP symmetry. The vacuum alignments of the scalar fields in the model spontaneously break these symmetries and lead to the construction of the fermion mass matrices. With the help of the MES formulas, we extract the light neutrino masses and the mixing observables. In the active neutrino sector, we obtain the TM2 mixing pattern with non-zero reactor angle and broken mu-tau reflection symmetry. We express all the active and the sterile oscillation observables in terms of only four real model parameters. Using this highly constrained scenario we predict sin(2)theta(23) = 0.545(-0.004)(+0.003), sin delta = -0.911(-0.005)(+0.006), vertical bar U-e4 vertical bar(2) = 0.029(-0.008)(+0.009), vertical bar U-mu 4 vertical bar(2) = 0.010(-0.003)(+0.003) and vertical bar U-tau 4 vertical bar(2) = 0.006(-0.002)(+0.002) which are consistent with the current data.