Speaker
Fabian Wagner
Description
Horndeski theories are widely considered extensions of general relativity, intended to explain the dark sector dynamically as well as alleviate the existing cosmological tensions. In this poster, I present a first renormalisation group analysis of the subclass of shift-symmetric kinetic braiding models, which still holds up to observation after GW170817. In particular, I show the four arising fixed points of which only the shifted Gaussian one is deemed reliable. As the investigated couplings are all irrelevant at this fixed point, I conclude that these kind of kinetic braiding models are likely not in the asymptotically safe landscape.
