Determination of $Î_{\overline{MS}}$ from quenched and $N_f = 2$ dynamical QCD
arXiv:hep-lat/0103023 · doi:10.1016/S0370-2693(01)01103-0
Abstract
The scale parameter $Î_{\overline{MS}}$ is computed on the lattice in the quenched approximation and for $N_f = 2$ flavors of light dynamical quarks. The dynamical calculation is done with non-perturbatively $O(a)$ improved Wilson fermions. In the continuum limit we obtain $Î_{\overline{MS}}^{N_f=0} = 243(1)(10)$ MeV and $Î_{\overline{MS}}^{N_f=2} = 217(16)(11)$ MeV, respectively.
16 pages, 6 figures. Minor changes. Final version to be published in Phys. Lett. B