On Quantum Fields at High Temperature

Bischer, Ingolf; Grandou, Thierry; Hofmann, Ralf

doi:10.3390/universe5010026

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On Quantum Fields at High Temperature

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Bischer, Ingolf
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Bischer, I., Grandou, T., & Hofmann, R. (2019). On Quantum Fields at High Temperature. Universe, 5(1): 26. doi:10.3390/universe5010026.

Cite as: https://hdl.handle.net/21.11116/0000-0005-4986-2

Abstract

Revisiting the fast fermion damping rate calculation in a thermalized momentum scale eT (QED) and/or momentum scale gT (QCD) plasma at 4-loop order, focus is put on a peculiar perturbative structure which has no equivalent at zero-temperature. Not surprisingly, and in agreement with previous C-algebraic analyses, this structure renders the use of thermal perturbation theory quite questionable.