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hep-ph2026
Towards a consistent perturbation theory at finite temperature
Passant Ali, Peter Lowdon, Owe Philipsen
The standard approach to perturbation theory for finite-temperature quantum field theories has several issues, including the appearance of ill-defined on-shell contributions in the…
hep-ph2025★ 2 cited
Goldstone bosons across thermal phase transitions
Peter Lowdon, Owe Philipsen
Temperature has a significant effect on the properties of quantum field theories (QFTs) with a spontaneously broken symmetry, in particular on the massless Goldstone bosons that ex…