QUANTUM VECTOR-FIELDS IN THE BACKGROUND OF A (1+1)-DIMENSIONAL BLACK-HOLE

We apply the Stueckelberg formalism to describe massive and massless quantum vector fields propagating in the static metric of a (1 + 1) black hole. We find exact solutions of the field equations and compute the expectation value of the energy-momentum tensor. In the massless case, the renormalized stress-energy tensor vanishes identically. In the massive one, it agrees with the results obtained for scalar and Dirac fields in the region near the event horizon, yielding a temperature of M/2pi for the black hole.