Vanishing minors in the neutrino mass matrix from abelian gauge symmetries
Abstract
Augmenting the Standard Model by three righthanded neutrinos allows for an anomalyfree gauge group extension G _{max} = U(1)_{ BL } × U(1)_{ Le }  _{ Lμ } × U(1)_{ LμLτ }. While simple U(1) subgroups of G _{max} have already been discussed in the context of approximate flavor symmetries, we show how twozero textures in the righthanded neutrino Majorana mass matrix can be enforced by the flavor symmetry, which is spontaneously broken very economically by singlet scalars. These zeros lead to two vanishing minors in the lowenergy neutrino mass matrix after the seesaw mechanism. This study may provide a new testing ground for a zerotexture approach: the different classes of twozero textures with almost identical neutrino oscillation phenomenology can in principle be distinguished by their different Z' interactions at colliders.
 Publication:

Journal of High Energy Physics
 Pub Date:
 July 2012
 DOI:
 10.1007/JHEP07(2012)083
 arXiv:
 arXiv:1203.4951
 Bibcode:
 2012JHEP...07..083A
 Keywords:

 Neutrino Physics;
 Gauge Symmetry;
 High Energy Physics  Phenomenology
 EPrint:
 12 pages