In this review, we present the most key aspects of modern thermal perturbation theory based on hard thermal loop (HTL) approximation including its theoretical foundations and discuss some applications within quantum electrodynamics (QED) and quantum chromodynamics (QCD) plasma. To maintain conciseness, our discussion is confined to thermal equilibrium scenarios, but consider a variety of different quantities and settings. Specifically, we discuss both bulk thermodynamic properties and real-time observables, spanning the domain of high temperatures, relevant for heavy-ion physics.
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Haque et al. (2024) studied this question.
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