出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The leading order low energy parameters like the pion decay constant or the quark condensate
are well-known from “classical” low energy theorems and experiments. It is a challenge, however,
to find these parameters based exclusively on an ab-initio QCD calculation. We discuss
results of a quenched lattice calculation of low energy constants using the chirally improved
Dirac operator. Several lattice sizes at different lattice spacings are studied, using pseudoscalar
and axial vector correlators. We find consistent results for fp = 96(2) MeV, fK = 105(2) MeV,
S = (286(4) MeV)3, the average light quark mass m¯ = 4:1(2:4) MeV and ms = 101(8) MeV.
