We revisit the earlier determination of ${\alpha }_s(M_Z)$ via perturbative analyses of short-distance-sensitive lattice observables, incorporating new lattice data and performing a modified version of the original analysis. We focus on two high-intrinsic-scale observables, $\log (W_{11})$ and $\log (W_{12})$, and one lower-intrinsic-scale observable, $\log (W_{12}/u_0^6)$, finding improved consistency among the values extracted using the different observables and a final result, ${\alpha }_s(M_Z)=0.1192\pm 0.0011$, $\sim 2\sigma$ higher than the earlier result, in excellent agreement with recent nonlattice determinations and, in addition, in good agreement with the results of a similar, but not identical, reanalysis by the HPQCD Collaboration. A discussion of the relation between the two reanalyses is given, focusing on the complementary aspects of the two approaches.

• Received 6 September 2008

DOI:https://doi.org/10.1103/PhysRevD.78.114504