Abstract
Self-energy corrections induced by the presence of thermal gravitons are computed at the one-loop level. It is found that thermal gravitons lead to a decreasing, effective temperature-dependent mass contrary to the situation in ordinary gauge theories where the effective mass is an increasing function of the temperature. It is argued that for 4πT2 larger then [Formula: see text], massive modes in the system are damped out in time or they cause instabilities. We also verify that the temperature-dependent effective mass satisfies Weinberg’s on-shell gauge invariance.
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