Finite-size scaling of meson propagators

Using quenched chiral perturbation theory we compute meson correlation functions at finite volume and fixed gauge field topology. We also present the corresponding analytical predictions for the unquenchcd theory at fixed gauge field topology. These results can be used to measure the low-energy parameters of the chiral Lagrangian from lattice simulations in volumes much smaller than one pion Compton wavelength. (C) 2002 Published by Elsevier Science B.V.