Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 11: Elektroschwache Physik (Theorie) 2

T 11.5: Talk

Monday, March 4, 2013, 17:45–18:00, WIL-A120

Vacuum stability in the SM and the three-loop β-functions for the Higgs and Yukawa sector — Konstantin Chetyrkin and •Max Zoller — KIT, Germany

The ground state of the Higgs field in the Standard Model is introduced through the mechanism of Spontaneous Symmetry Breaking in the electroweak sector. In the presence of radiative corrections this vacuum state may become unstable as the Higgs potential can develop a deeper minimum than the one at the Fermi scale. This phenomenon is closely related to the evolution of the quartic Higgs self-interaction described by the corresponding β-function and the question whether it becomes negative at high scales. In this talk the effect of the three-loop β-functions on the Higgs self-interaction and the Yukawa coupling, which we recently calculated, on the SM vacuum stability will be discussed for a Higgs mass in the vicinity of 125 GeV.