Roberto Percacci: Beta functions and scattering in a shift-invariant scalar theory

Conference talk at "From perturbative to non-perturbative QFT" 14-16 June 2023, in Münster, Germany
Abstract: A single scalar with higher-derivative kinetic term and derivative quartic interactions is a toy model for higher derivative gravity. The Functional Renormalization Group shows that this theory is asymptotically free both in the UV and in the IR. The physical implications of this result are clarified in part by by computing the scattering amplitudes.
More information on the conference: www.uni-muenst...