出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on a numerical simulation with 2+1 dynamical flavors of overlap fermions. We calculate
pseudo-scalar masses and decay constants on a 163£48£(0.11 fm)4 lattice at five different
up and down quark masses and two strange quark masses. The lightest pion mass corresponds to
¼ 310 MeV. We also study the validity of the chiral perturbation theory using the results of the
numerical simulation with two dynamical flavors and conclude that the one-loop formulae cannot
be directly applied in the strange quark mass region. We therefore extrapolate our 2+1-flavor
results to the chiral limit by fitting the data to the two-loop formulae of the chiral perturbation
theory.
