One-loop corrections to the neutrino mass in the axion–neutrino coupling scheme

Abstract

The coupling between neutral scalar axions and neutrinos is discussed as a possible mechanism responsible for a nonzero neutrino mass. We add to the conventional Peccei and Queen zeroth-order approach, that is the breaking of the U(1) symmetry at the axion level added to the fourth component of the neutrino current, one-loop corrections assuming the composite nature of flavor neutrinos. The calculations are performed for the three active neutrino flavors.