Holographic Gauss-Bonnet transport

We extend the computational framework of \cite{Buchel:2023fst} to analysis of shear and bulk viscosities in generic strongly coupled holographic Gauss-Bonnet gauge theories. The finite Gauss-Bonnet coupling constant encodes holographic plasma with non-equal central charges $c\mathrm{\ne }a$ at the ultraviolet fixed point. In a simple model we discuss transport coefficients within the causality window $-\frac{1}{2}\le \frac{c-a}{c}\le \frac{1}{2}$ of the theory.