PUB - Publikationen an der Universität Bielefeld

We study the simultaneous effect of finite volume and finite lattice spacingcorrections in the framework of chiral perturbation theory (ChPT) in theepsilon regime, for both the Wilson and staggered formulations. In particularthe finite volume corrections to the low energy constants (LECs) in Wilson andstaggered ChPT are computed to next-to-leading order (NLO) in the\epsilon-expansion. For Wilson with N_f = 2 flavours and staggered with genericN_f the partition function at NLO can be rewritten as the LO partition functionwith renormalized effective LECs.