Electroweak phase transition with spontaneous Z 2-breaking

Electroweak phase transition with spontaneous Z 2-breaking

Blog Article

Abstract This work investigates a simple, representative extension of the Standard Model with a real scalar singlet and spontaneous Z 2 breaking, which allows for a strongly first-order phase transition, as required by electroweak baryogenesis.We perform analytical and numerical calculations that Pan Lids systematically include one-loop thermal effects, Coleman-Weinberg corrections, and daisy resummation, as well as evaluation of bubble nucleation.We study the rich thermal history and identify the conditions for a strongly first-order electroweak phase transition with nearly degenerate extrema at zero temperature.This requires a light scalar with mass below 50 GeV.

Exotic Higgs decays, as well as NO-POO ORIGINAL Higgs coupling precision measurements at the LHC and future collider facilities, will test this model.Additional information may be obtained from future collider constraints on the Higgs self-coupling.Gravitational-wave signals are typically too low to be probed by future gravitational wave experiments.