Speaker
Description
Contrary to general belief, the metric fluctuations in quantum gravity can have important consequences for present day experiments in particle physics. The quantum scale symmetry at an ultraviolet fixed point can predict some couplings of the standard model of particle physics. Quantum fluctuations of the metric determine the quartic self-interaction of the Higgs-scalar at an energy scale close to the Planck mass. Extrapolating the running couplings to the electroweak scale, the mass of the Higgs boson has been predicted in the range found later by experiment. Further predictions may concern the quark masses or beyond standard model particles.
For cosmology the scaling solution of quantum gravity for scalar potentials is found to have a form that predicts both a very early inflationary epoch and late dynamical dark energy. The spectrum of primordial cosmic fluctuations is, in principle, computable. The beginning of the Universe is typically found to be a scale invariant state that may be called „great emptiness".
This session is shared with the 4th Annual Conference COST CA18108 : Quantum gravity phenomenology in the multi-messenger approach.
