Perturbative Peculiarities of Quantum Field Theories at High Temperatures

Bischer, Ingolf; Grandou, Thierry; Hofmann, Ralf

doi:10.3390/universe5030081

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Perturbative Peculiarities of Quantum Field Theories at High Temperatures

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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). Perturbative Peculiarities of Quantum Field Theories at High Temperatures. Universe, 5(3): 81. doi:10.3390/universe5030081.

Cite as: https://hdl.handle.net/21.11116/0000-0005-4B45-A

Abstract

Revisiting the fast fermion damping rate calculation in a thermalized QED and/or QCD plasma in thermal equilibrium at four-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 more than questionable.