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Seesaw model with hidden $SU(2)_H \times U(1)_X$ gauge symmetry

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arxiv 1812.08473 v2 pith:T2MOQ2Z6 submitted 2018-12-20 hep-ph

Takaaki Nomura , Hiroshi Okada This is my paper · ORCID
classification hep-ph
keywords gaugemodelseesawsymmetryhiddenmixingsectortimes
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We propose a seesaw model with a hidden gauge symmetry $SU(2)_H \times U(1)_X$ where two types of standard model singlet fermions in realizing a seesaw mechanism are organized into $SU(2)_H$ doublet. Then we formulate scalar and gauge sector, neutrino mass matrix and lepton flavor violations. In our gauge sector, $Z$-$Z'$ mixing appears after spontaneous symmetry breaking and we investigate constraint from $\rho$-parameter. In addition we discuss $Z'$ production at the large hadron collider via $Z$-$Z'$ mixing, where $Z'$ tends to dominantly decay into heavy neutrinos.

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