出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In order to study the running coupling in four-flavour QCD, we review the set-up of the
Schrödinger functional (SF) with staggered quarks. Staggered quarks require lattices which, in the
usual counting, have even spatial lattice extent L/a while the time extent T/a must be odd. Setting
T = L is therefore only possible up to O(a), which introduces different cutoff effects already
in the pure gauge theory. We re-define the SF such as to cope with this situation and determine
the corresponding classical background field. A perturbative calculation yields the coefficient of
the pure gauge O(a) boundary counterterm to one-loop order.
