Simulating at Realistic Quark Masses: Pseudoscalar Decay Constants and Chiral Logarithms

Göckeler, M.; Horsley, R.; Nakamura, Y.; Pleiter, D.; Rakow, P. E. L.; Schierholz, G.; Schroers, W.; Streuer, T.; Stüben, H.; Zanotti, J. M.

Simulating at Realistic Quark Masses: Pseudoscalar Decay Constants and Chiral Logarithms

Authors

Description

Due to improvements in computer performance and algorithms, the rapidly increasing cost for unquenched Wilson-type fermions with lighter quarks has been ameliorated and new simulations are now possible. Here we present results using two flavours of O(a)-improved Wilson fermions for meson decay constants at pseudoscalar masses down to 320MeV. Results are at several lattice spacings down to about 0.07fm and include a non-perturbative determination of the renormalisation constant. This enables us to attempt contact with (partially quenched) chiral perturbation theory.
7 pages, contribution to Lattice 2006