Automatic generation of vertices for the Schroedinger functional

Understand

We present a multiplication algorithm to recursively construct vertices for the Schroedinger functional in the abelian background field case.

• The algorithm is suited for automatic perturbative calculations with a variety of actions.
• As first applications, we derive ratios of the lambda parameters between the lattice scheme (improved gauge actions including six link loops) and the $\bar{\rm MS}$ scheme, and one-loop results for the Schroedinger functional coupling with a lattice $T=L \pm a$, which is motivated by considering staggered fermions.