Errata: "On the Infinite Order Resumation of Some Finite Temperature Diagrams (original) (raw)

Modern Physics Letters A, 1994

Abstract

In the scalar ɸ4 theory we discuss the behavior of the thermal four-point amplitude, after making a resumation of an infinite chain of loops. The calculation is presented in the thermofield dynamics formalism. It is shown that the zero temperature contribution to the real part of the amplitude has no differences with respect to the usual one-loop result. This is not the case, however, for the temperature-dependent part, where the loop resumation implies a completely different behavior of the amplitude, for the real as well as for the imaginary parts, compared to the one-loop result.

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