Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-10-21
Nucl.Phys.Proc.Suppl. 106 (2002) 805-810
Physics
High Energy Physics
High Energy Physics - Lattice
Lattice2001(improvement), LaTeX, 3 pages, 6 postscript figures
Scientific paper
The $O(a)$ improved Wilson quark action on the anisotropic lattice is investigated. We carry out numerical simulations in the quenched approximation at three values of lattice spacing ($a_{\sigma}^{-1}=1$--2 GeV) with the anisotropy $\xi=a_{\sigma}/a_{\tau}=4$, where $a_{\sigma}$ and $a_{\tau}$ are the spatial and the temporal lattice spacings, respectively. Using the dispersion relation of mesons, the bare anisotropy $\gamma_F$ in the quark action is numerically tuned below the charm quark mass region with the statistical accuracy of 1 % level. The systematic uncertainties in the calibration are examined and found to be under control in the continuum limit. Then we compute the light hadron masses and find that they are consistent with the result of the UKQCD Collaboration on the isotropic lattice. The effect of the uncertainty in the calibration on the hadron spectrum for physical quark masses is also found to be under control.
Matsufuru Hideo
Onogi Tetsuya
Umeda Takashi
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