EUCLIDEAN THERMAL SPINOR GREENS-FUNCTION IN THE SPACETIME OF A STRAIGHT COSMIC-STRING

Within the framework of the quantum field theory at finite temperature on a conical space, we determine the Euclidean thermal spinor Green's function for a massless spinor field. We then calculate the thermal a verage of the energy-momentum tensor of a thermal bath of massless fer mions. In the high-temperature limit, we find that the straight cosmic string does not perturb the thermal bath.