Speaker
Description
A minimal model allowing for the stage of accelerated expansion in the early Universe is inlation driven by the Standard model Higgs field. However, this model requires large non-minimal coupling between the Higgs field and gravity. This leads to quite low energy scale after which the model becomes strongly coupled and non-predictive. In particular, UV completion of Higgs inflation is required for the description of reheating and connection between low and high energy parameters. I will discuss the possibilities to build UV completion for Higgs inflation by adding the quadratic in curvature term for gravity and the scenario allowing for completing the model without introducing new degrees of freedom which exploits non-local propagator for the Higgs field. It is shown that the predictions for inflationary parameters are not sensitive to the details of UV completion while the reheating stage crucially depends on these details.
