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arXiv · 1503.01132

The running coupling of 8 flavors and 3 colors

Zoltan Fodor·Kieran Holland·Julius Kuti·Santanu Mondal·Daniel Nogradi·Chik Him Wong
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Abstract

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.

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Zoltan Fodor, Kieran Holland, Julius Kuti, Santanu Mondal, Daniel Nogradi, Chik Him Wong. 2015-06-10. The running coupling of 8 flavors and 3 colors. https://arxiv.org/abs/1503.01132

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