Central limit theorems for Green metrics on hyperbolic groups

Recently, the first author and Tanaka obtained a large deviation principle comparing two Green metrics on a non-elementary hyperbolic group associated to finitely supported, admissable probability measures. The aim of this article is to prove the corresponding central limit theorem. Furthermore, our results apply to various other metrics including length functions associated to Anosov representations and to group actions on hyperbolic metric spaces. In the particular case that is the fundamental group of a closed hyperbolic manifold our work provides a statistical characterisation for the hitting measure of a finitely supported random walk being in the same class as the Lebesgue measure.