Active and sterile neutrino phenomenology with A4 based minimal extended seesaw

Pritam Das, Ananya Mukherjee, Mrinal Kumar Das
2019 Nuclear Physics B  
We study a model of neutrino within the framework of the minimal extended seesaw (MES), which plays an important role in active and sterile neutrino phenomenology in (3+1) scheme. The A_4 flavor symmetry is augmented by an additional Z_4× Z_3 symmetry to constraint the Yukawa Lagrangian of the model. We use non-trivial Dirac mass matrix, with broken μ-τ symmetry, as the origin of leptonic mixing. Interestingly, such a structure of mixing naturally leads to the non-zero reactor mixing angle
more » ... Non-degenerate mass structure for right-handed neutrino M_R is considered so that we can further extend our study to Leptogenesis. We have also considered three different cases for sterile neutrino mass, M_S to check the viability of this model, within the allowed 3σ bound in this MES framework.
doi:10.1016/j.nuclphysb.2019.02.024 fatcat:wg3yzyi2orevxpam7eia22oe5q