arXiv:hep-th/9803070·v1·High Energy Physics — Theory
Mass Renormalization for Time Dependent Correlation Functions in Shibata-Hashitsume's Projection Operator Method
T.Koide🇯🇵 · M.Maruyama🇯🇵 · F.Takagi🇯🇵
Abstract
We study the time development of correlation functions at both zero and finite temperature with Shibata-Hashitsume's projection operator method and carry out the renormalization of ultraviolet divergence that appears in a time-dependent frequency shift, using a mass counter term. A harmless divergence of log t-type remains at an initial time t=0 after the lowest order renormalization.
Comments: 9 pages, 4 figures, RevTeX