On the fate of the Standard Model at finite temperature

Jul 24, 2015
13 pages
Published in:
  • JHEP 05 (2016) 050
  • Published: May 10, 2016
e-Print:

Citations per year

201520172019202120230246810
Abstract: (Springer)
In this paper we revisit and update the computation of thermal corrections to the stability of the electroweak vacuum in the Standard Model. At zero temperature, we make use of the full two-loop effective potential, improved by three-loop beta functions with two-loop matching conditions. At finite temperature, we include one-loop thermal corrections together with resummation of daisy diagrams. We solve numerically — both at zero and finite temperature — the bounce equation, thus providing an accurate description of the thermal tunneling. Assuming a maximum temperature in the early Universe of the order of 1018^{18} GeV, we find that the instability bound excludes values of the top mass Mt_{t} ≳ 173.6 GeV, with Mh_{h} ≃ 125 GeV and including uncertainties on the strong coupling. We discuss the validity and temperature-dependence of this bound in the early Universe, with a special focus on the reheating phase after inflation.
Note:
  • 13 pages (two-column format), 13 figures
  • Higgs Physics
  • Standard Model
  • vacuum: stability
  • effective potential: finite temperature
  • effective potential: correction
  • correction: thermal
  • tunneling: thermal
  • radiative correction: higher-order
  • reheating
  • temperature: reheating