Accelerated expansion of the Universe a la the Stueckelberg mechanism
  We investigate a cosmological model in which the Stueckelberg fields are
non-minimally coupled to the scalar curvature in a gauge invariant manner. We
present not only a solution that can be considered in the context of the late
time acceleration of the universe but also a solution compatible with the
inflationary cosmology. Distinct behaviors of the scalar and vector fields
together with the real valued mass gained by the Stueckelberg mechanism lead
the universe to go through the two different accelerated expansion phases with
a decelerated expansion phase between them. On the other hand, in the solutions
we present, if the mass is null then the universe is either static or exhibits
a simple power law expansion due to the vector field potential.
