Explicit proof of equivalence of two-point functions in the two formalisms of thermal field theory

Details Explicit proof of equivalence of two-point functions in the two formalisms of thermal field theory Explicit proof of equivalence of two-point functions in the two formalisms of thermal field theory

2001-08-21

arxiv.org/abs/hep-th/0108146v1

Commun.Theor.Phys.37:49-54,2002

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, Latex, no figures

Scientific paper

We give an explicit proof of equivalence of the two-point function to one-loop order in the two formalisms of thermal $\lambda \phi^3$ theory based on the expressions in the real-time formalism. It is indicated that the key-point of completing the proof is to separate carefully the imaginary part of the zero-temperature loop integral from relevant expressions and this fact will certainly be very useful for examination of the equivalence problem of the two formalisms of thermal field theory in other theories, including the one of the propagators for scalar bound states in a NJL model.

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