2+1 flavor lattice QCD simulation with $O(a)$-improved Wilson quarks

Details 2+1 flavor lattice QCD simulation with $O(a)$-improved Wilson quarks 2+1 flavor lattice QCD simulation with $O(a)$-improved Wilson quarks

2008-10-03

arxiv.org/abs/0810.0563v1

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 15 figures, 1 table talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Wil

Scientific paper

We present simulation details and results for the light hadron spectrum in N f = 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 Luscher'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.

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