Unquenched simulations with N_f=2 light quark flavours

TL;DR

This study investigates how meson masses and decay constants depend on quark mass in two-flavor QCD using lattice simulations, applying PQWchiPT for extrapolation, and finds NNLO effects are significant.

Contribution

The paper applies partially quenched Wilson Chiral Perturbation Theory to analyze quark mass dependence in N_f=2 QCD, highlighting the importance of NNLO terms over O(a) corrections.

Findings

NNLO terms are more significant than O(a) terms in the analysis.

Extrapolation to zero quark mass is achieved using PQWchiPT.

Results are compared with recent CP-PACS findings.

Abstract

The quark mass dependence of meson masses and decay constants in N_f=2 QCD is studied at a fixed gauge coupling with different dynamical quark masses. Partially Quenched Wilson Chiral Perturbation Theory (PQWchiPT) is applied to obtain the extrapolation to zero quark mass. It is shown, that in our analysis NNLO-terms play a more important role than O(a)-terms, which can be neglected. Also we compare our results with recent CP-PACS results.