The strong coupling αs can be obtained from the static energy as shown in previous lattices studies. For short distances, the static energy can be calculated both on the lattice with the use of Wilson line correlators, and with the perturbation theory up to three loop accuracy with leading ultrasoft log resummation. Comparing the perturbative expression and lattice data allows for precise determination of αs(mZ). We will present preliminary results for the determination of αs(MZ) in (2+1+1)-flavor QCD using the configurations made availableby the MILC-collaboration with smallest lattice spacing reaching 0.0321fm.
@article{arxiv.2502.01453,
title = {Strong coupling in (2+1+1)-flavor QCD},
author = {Viljami Leino and Alexei Bazavov and Nora Brambilla and Andreas Kronfeld and Julian Mayer-Steudte and Peter Petreczky and Sebastian Steinbeißer and Antonio Vairo and Johannes Heinrich Weber},
journal= {arXiv preprint arXiv:2502.01453},
year = {2025}
}
Comments
10 pages, 4 figures, Contribution to the 41st International Symposium on Lattice Field Theory (LATTICE2024), 28 July - 3 August 2024, Liverpool, UK