Two flavors of dynamical quarks on anisotropic lattices

Umeda Takashi

Aoki Sinya

Fukugita Masataka

Ishikawa Ken-Ichi

Ishizuka Naruhito

Iwasaki Yoichi

Kanaya Kazuyuki

Kuramashi Yoshinobu

Lesk Victor Isaac

Namekawa Yusuke

Okawa Masanori

Taniguchi Yusuke

Ukawa Akira

Yoshie Tomoteru

Physical review D

We report on our study of two-flavor full QCD on anisotropic lattices using O(a)-improved Wilson quarks coupled with a renormalization-group-improved glue. The bare gauge and quark anisotropies corresponding to the renormalized anisotropy ξ=as/at = 2 are determined as functions of β and κ, which cover the region of spatial lattice spacings a s ≈ 0.28-0.16 fm and mPS /mV ≈ 0.6-0.9. The calibrations of the bare anisotropies are performed with the Wilson loop and the meson dispersion relation at four lattice cutoffs and 5-6 quark masses. Using the calibration results we calculate the meson mass spectrum and the Sommer scale r0. We confirm that the values of r0 calculated for the calibration using pseudoscalar and vector meson energy momentum dispersion relations coincide in the continuum limit within errors. This work serves to lay the groundwork for studies of heavy quark systems and the thermodynamics of QCD including the extraction of the equation of state in the continuum limit using Wilson-type quark actions.

英語

American Physical Society

Copyright (c) 2003 American Physical Society.

[ISSN] 1550-7998

[DOI] 10.1103/PhysRevD.68.034503

[NCID] AA00773624

[DOI] http://dx.doi.org/10.1103/PhysRevD.68.034503