About
We study the high-temperature behavior of the electroweak sector of the Standard Model Effective Field Theory (SMEFT), including dimension-six operators, by performing dimensional reduction up to $\mathcal{O}(g^4)$ in the gauge couplings. Our derivation accounts for one-loop corrections to kinetic terms and scalar quartic couplings, as well as two-loop contributions to thermal mass parameters. The latter include effects from purely bosonic operators and from four-fermion interactions. The resulting three-dimensional theory provides a suitable framework for non-perturbative investigations of the thermal history of the early universe within the SMEFT. In particular, we discuss how existing lattice results can be employed to assess the viability of a phase transition in this extended setup, even in the absence of modifications to the vacuum structure at zero temperature.
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The talk
Credits and licence
- Institution
- CERN
- Speaker
- Maria Cristina Fiore
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed