The running coupling of 8 flavors and 3 colors

2015/03/03 by Zoltán Fodor, Fodor, Zoltan, Kieran Holland +9
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1503.01132

openalex publication_date 2015/03/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• The gradient flow in a twisted box
• The Gradient Flow Coupling in Minimal Walking Technicolor

Related

• The gradient flow running coupling scheme
• The gradient flow running coupling in SU2 with 8 flavors
• Gradient flow running coupling in SU(2) Nf=6 flavors
• The running coupling of the minimal sextet composite Higgs model
• The β-function of SU(3) gauge theory with N_f = 10 massless fermions in the fundamental representation