Robust approach to thermal resummation: Standard Model meets a singlet
Abstract
Perturbation theory alone fails to describe thermodynamics of the electroweak phase transition. We review a technique combining perturbative and nonperturbative methods to overcome this challenge. Accordingly, the principal theme is a tutorial of hightemperature dimensional reduction. We present an explicit derivation with a real singlet scalar and compute the thermal effective potential at twoloop order. In particular, we detail the dimensional reduction for a realsinglet extended Standard Model. The resulting effective theory will impact future nonperturbative studies based on lattice simulations as well as purely perturbative investigations.
 Publication:

arXiv eprints
 Pub Date:
 February 2021
 arXiv:
 arXiv:2102.11145
 Bibcode:
 2021arXiv210211145S
 Keywords:

 High Energy Physics  Phenomenology;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 86 pages, 2 figures and 141 Feynman diagrams