Retarded-Advanced N-point Green Functions in thermal field theories

Details Retarded-Advanced N-point Green Functions in thermal field theories Retarded-Advanced N-point Green Functions in thermal field theories

1993-06-02

arxiv.org/abs/hep-ph/9306210v1

Nucl.Phys. B432 (1994) 281-314

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1016/0550-3213(94)90603-3

The general relationship between a Retarded-Advanced Green function of the Real Time formalism and analytical continuations of the Imaginary Time Amplitude is obtained via perturbation theory. A 4-point R-A function is, at most, a linear combination of three analytical continuations, and a 5-point R-A function of seven continuations. The R-A functions are written as the sum of one analytical continuation plus discontinuities across single momentum transfer variables. These discontinuities

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