Vanishing Minors in the Neutrino Mass Matrix from Abelian Gauge Symmetries

Details Vanishing Minors in the Neutrino Mass Matrix from Abelian Gauge Symmetries Vanishing Minors in the Neutrino Mass Matrix from Abelian Gauge Symmetries

2012-03-22

arxiv.org/abs/1203.4951v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages

Scientific paper

Augmenting the Standard Model by three right-handed neutrinos allows for an anomaly-free gauge group extension G_max = U(1)_(B-L) x U(1)_(L_e-L_mu) x U(1)_(L_mu-L_tau). While simple U(1) subgroups of G_max have already been discussed in the context of approximate flavor symmetries, we show how two-zero textures in the right-handed 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 low-energy neutrino mass matrix after the seesaw mechanism. This study may provide a new testing ground for a zero-texture approach: the different classes of two-zero textures with almost identical neutrino oscillation phenomenology can in principle be distinguished by their different Z' interactions at colliders.

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