Seesaw model with hidden SU(2)H × U(1)X gauge symmetry
Abstract
We propose a seesaw model with a hidden gauge symmetry SU(2)H × 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 -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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