Speaker
Mr
Marco Zatta
(University of Helsinki)
Description
Current Higgs boson and top quark data favour metastability of our vacuum which raises questions as to why the Universe has chosen an energetically disfavoured state and remained there during the primordial dynamics. In this talk I will point out that allowing a simple Higgs-inflaton coupling can explain why the Higgs ended up in the electroweak vacuum after inflation. I will show that this coupling is present in many realistic models of reheating and thus well motivated. I will also discuss the effects of the Higgs-inflaton coupling during the initial period of reheating, also known as preheating, where the sizable production of Higgs particles can induce large fluctuations of the Higgs field which may destabilize the electroweak vacuum.
Primary author
Mr
Marco Zatta
(University of Helsinki)
