We study a minimal one-loop radiative mechanism for generating small Majorana neutrino masses in inverse seesaw extensions of the Standard Model with two singlet fermions per family. The new feature of this radiative mechanism is that the one-loop induced left-handed neutrino mass matrix is directly proportional to the Majorana mass matrix of the right-handed neutrinos. This is a very economical scenario without necessitating the existence of nonstandard scalar or gauge fields. © 2012 American Physical Society.
|Physical Review D - Particles, Fields, Gravitation and Cosmology
|Published - 3 Dec 2012
- neutrino masses, quantum effects