We compute the renormalized running coupling of SU(3) gauge theory coupled to N_f = 8 flavors of massless fundamental Dirac fermions. The recently proposed finite volume gradient flow scheme is used. The calculations are performed at several lattice spacings allowing for a controlled continuum extrapolation. The results for the discrete beta-function show that it is monotonic without any sign of a fixed point in the range of couplings we cover. As a cross check the continuum results are compared with the well-known perturbative continuum beta-function for small values of the renormalized coupling and perfect agreement is found.
@article{arxiv.1503.01132,
title = {The running coupling of 8 flavors and 3 colors},
author = {Zoltan Fodor and Kieran Holland and Julius Kuti and Santanu Mondal and Daniel Nogradi and Chik Him Wong},
journal= {arXiv preprint arXiv:1503.01132},
year = {2015}
}