High-precision scale setting in lattice QCD

Understand

Scale setting is of central importance in lattice QCD.

• It is required to predict dimensional quantities in physical units.
• Moreover, it determines the relative lattice spacings of computations performed at different values of the bare coupling, and this is needed for extrapolating results into the continuum.
• Thus, we calculate a new quantity, $w_0$, for setting the scale in lattice QCD, which is based on the Wilson flow like the scale $t_0$ (M.