A new U(1) extension of the Standard Model is proposed, with a neutrino-coupled gauge boson and a dark Higgs scalar as a freeze-in dark matter candidate, yielding an estimated coupling between 10^-8.5 and 10^-6 times the electroweak coupling.
Vector Boson decays of the Higgs Boson
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abstract
We derive the width of the Higgs boson into vector bosons. General formulas are derived both for the on-shell decay H -> VV as well for the off-shell decays, H -> V^* V and H -> V^* V^*, where V=\gamma,W,Z. For the off-shell decays the width of the decaying vector boson is properly included. The formulas are valid both for the Standard Model as well as for arbitrary extensions. As an example we study in detail the gauge-invariant effective Lagrangian models where we can have sizable enhancements over the Standard Model that could be observed at LEP.
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Minimal extension of the Standard Model with a mirror symmetry between fundamental fermions and a possible origin of dark matter
A new U(1) extension of the Standard Model is proposed, with a neutrino-coupled gauge boson and a dark Higgs scalar as a freeze-in dark matter candidate, yielding an estimated coupling between 10^-8.5 and 10^-6 times the electroweak coupling.