Speaker
Description
The one-loop determination of the coefficient $c_{\text{SW}}$ of the Wilson quark
action has been useful, in conjunction with non-perturbative
determinations of $c_{\text{SW}}$, to push the leading cut-off effects for on-shell
quantities to $\mathcal{O}(\alpha^2 a)$, or eventually $\mathcal{O}(a^2)$, if no link-smearing is
employed. These days it is common practice to include some link-smearing
into the definition of the fermion action. Unfortunately, in this
situation only the tree-level value $c_{\text{SW}}^{(0)}=1$ is known, and
cut-off effects start at $\mathcal{O}(\alpha a)$. We present some general techniques
for calculating one loop quantities in lattice perturbation theory
which continue to be useful for smeared-link fermion actions.
Specifically, we discuss the application to the 1-loop improvement
coefficient $c_{\text{SW}}^{(1)}$ for stout-smeared Wilson fermions.
