Determination of Low-Energy Constants of Wilson Chiral Perturbation Theory

Abstract

By matching Wilson twisted mass lattice QCD determinations of pseudoscalar meson masses to Wilson Chiral Perturbation Theory we determine the low-energy constants $W_6^{\prime }$, $W_8^{\prime }$ and their linear combination $c_2$. We explore the dependence of these low-energy constants on the choice of the lattice action and on the number of dynamical flavours.

Comments: 25 pages, 10 figures