2025/07/22 by Chala, Mikael, Fiore, Maria Cristina, Gil, Luis · 1 citation
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2507.16905
We perform dimensional reduction of the electroweak sector of the dimension-six SMEFT to order g4 in coupling constants g. This analysis includes one-loop contributions to kinetic terms and quartic couplings; as well as two-loop contributions, where operators such as four-fermion interactions first appear, to squared mass terms. Using lattice data, we also provide evidence that, in contrast with previous statements in the literature, the SMEFT may undergo a first-order phase transition even for null |ϕ|6 at zero temperature, where ϕ is the Higgs doublet. This opens the door to entirely unexplored directions in model building.