  We explore the phenomenology of virtual spin-1 contributions to the h to
gamma gamma and h to Z gamma decay rates in gauge extensions of the standard
model. We consider generic lorentz and gauge invariant vector
self-interactions, which can have non-trivial structure after diagonalizing the
quadratic part of the action. Such features are phenomenologically relevant in
models where the electroweak gauge bosons mix with additional spin-1 fields,
such as occurs in little higgs models, extra dimensional models, strongly
coupled variants of electroweak symmetry breaking, and other gauge extensions
of the standard model. In models where non-renormalizable operators mix field
strengths of gauge groups, the one-loop higgs decay amplitudes can be
logarithmically divergent, and we provide power counting for the size of the
relevant counter-term. We provide an example calculation in a 4-site moose
model that contains degrees of freedom that model the effects of vector and
axial vector resonances arising from TeV scale strong dynamics.
