Determination of _s13_s17945_s19s from the QCD static energy: an update
Bazavov, Alexei and Brambilla, Nora and Garcia i Tormo, Xavier and Petreczky, Peter and Soto, Joan and Vairo, Antonio
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Abstract
We present an update of our determination of the strong coupling alpha_s from the quantum chromodynamics static energy. This updated analysis includes new lattice data, at smaller lattice spacings and reaching shorter distances, the use of better suited perturbative expressions to compare with data in a wider distance range, and a comprehensive and detailed estimate of the error sources that contribute to the uncertainty of the final result. Our updated value for alpha_s at the Z-mass scale, M_Z, is alpha_s(M_Z)=0.1166^{_s160.0012}_{-0.0008}, which supersedes our previous result.
