出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present simulation details and results for the light hadron spectrum in Nf = 2+1 lattice
QCD with the nonperturbatively O(a)-improved Wilson quark action and the Iwasaki gauge action.
Simulations are carried out at a lattice spacing of 0.09 fm on a (2.9fm)3 box using the
PACS-CS computer. We employ the Lüscher’s domain-decomposed HMC algorithm with several
improvements to reduce the degenerate up-down quark mass toward the physical value. So far
the resulting pseudoscalar meson mass is ranging from 702MeV down to 156MeV. We discuss
on the stability and the efficiency of the algorithm. The light harden spectrum extrapolated at the
physical point is compared with the experimental values. We also present the values of the quark
masses and the pseudoscalar meson decay constants.
