  We extend the theory of Kimberly and Magueijo for the spacetime variation of
the electroweak couplings in the unified Glashow-Salam-Weinberg model of the
electroweak interaction to include quantum corrections. We derive the effective
quantum-corrected dilaton evolution equations in the presence of a background
cosmological matter density that is composed of weakly interacting and
non-weakly-interacting non-relativistic dark-matter components.
