Scotogenic model for co-bimaximal mixing

• Published in: The journal of high energy physics Vol. 2016; no. 7; pp. 1 - 23
• Main Authors: Ferreira, P. M., Grimus, W., Jurčiukonis, D., Lavoura, L.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2016; Springer Nature B.V
• Subjects: Classical and Quantum Gravitation; Elementary Particles; Gages; Gauges; High energy physics; Inert; Neutrinos; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Scalars; String Theory; Symmetry; Texts; Discrete Symmetries; Neutrino Physics
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP07(2016)010

A bstract We present a scotogenic model, i.e. a one-loop neutrino mass model with dark right-handed neutrino gauge singlets and one inert dark scalar gauge doublet η , which has symmetries that lead to co-bimaximal mixing, i.e. to an atmospheric mixing angle θ 23 = 45° and to a CP -violating phase δ = ±π / 2, while the mixing angle θ 13 remains arbitrary. The symmetries consist of softly broken lepton numbers L α ( α = e, μ, τ ), a non-standard CP symmetry, and three ℤ 2 symmetries. We indicate two possibilities for extending the model to the quark sector. Since the model has, besides η, three scalar gauge doublets, we perform a thorough discussion of its scalar sector. We demonstrate that it can accommodate a Standard Model-like scalar with mass 125 GeV, with all the other charged and neutral scalars having much higher masses.