2017/02/28 by M. Laine, M. Meyer, Germano Nardini +1
Mathematics · Physics and Astronomy · #Baryogenesis #Condensed matter physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Higgs boson #Lattice (music) #Loop (graph theory) #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum electrodynamics #Statistical physics #Theoretical physics #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2017.04.023
published as Nucl. Phys. B 920 (2017) 565-600 · 42 pages. v3: many clarifications added, published version
openalex publication_date 2017/05/08 · arxiv created 2017/05/19 · arxiv updated 2017/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Theories with extended Higgs sectors constructed in view of cosmological ramifications (gravitational wave signal, baryogenesis, dark matter) are often faced with conflicting requirements for their couplings; in particular those influencing the strength of a phase transition may be large. Large couplings compromise perturbative studies, as well as the high-temperature expansion that is invoked in dimensionally reduced lattice investigations. With the example of the inert doublet extension of the Standard Model (IDM), we show how a resummed 2-loop effective potential can be computed without a high-T expansion, and use the result to scrutinize its accuracy. With the exception of Tc, which is sensitive to contributions from heavy modes, the high-T expansion is found to perform well. 2-loop corrections weaken the transition in IDM, but they are moderate, whereby a strong transition remains an option.