EXACT SOLUTION OF QUANTUM MASSIVE SPIN-1 FIELD-EQUATIONS AND THEIR APPLICATION TO THE HAWKING-UNRUH EFFECT

A generalisation of the Stueckelberg action is implemented to describe spin-1 fields propagating in a four-dimensional Rindler manifold. Exa ct solutions of the field equations are obtained and the expectation v alue in the Minkowski vacuum state of the Rindler particle number oper ator is evaluated in the massive and massless cases. Further on, the e nergy-momentum tensor expectation value in the Rindler vacuum is compu ted and its qualitative behavior is analysed. In the zero mass limit w e rederive the results obtained by other methods. Like this case, in t he massive one it is shown that the energy-momentum spectrum is not Pl anckian. For small values of the mass, this spectrum is characterised by the Bose distribution function apart from a modification generated by a reduced density of states factor which is explicitly calculated.