Speaker
Description
The Standard Model of particle physics, in particular the Higgs potential, exhibits hints of fundamental quantum scale symmetry. At the same time, the asymptotic safety program has gathered substantial evidence for a nonperturbative fixed point of gravitational interactions. If this gravitational fixed point induces a UV completion of the Standard Model, it offers a compelling explanation for these observed hints of quantum scale symmetry.
My talk reviews a parameterized approach to map out the window of coupling values in which gravitational interactions induce a UV completion of the Standard-Model. This UV-complete window seems to be bounded by a critical surface: Coupling values inside this surface become asymptotically free due to the gravitational interaction, while gravity is too weak to UV-complete coupling values outside of it. Vice versa, this implies that the critical surface itself is an infrared attractor. Most strikingly, this suffices to fix several nontrivial quantitative relations among the Standard-Model coupling values, including the Higgs potential. I will summarize the status of confronting this approach with experimental data, in particular also with regards to Higgs vacuum stability.