Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2000-01-05
Nucl.Phys.Proc.Suppl. 83 (2000) 399-401
Physics
High Energy Physics
High Energy Physics - Lattice
LATTICE99(hightemp), 3 pages in latex, 4 Postscript figures
Scientific paper
The studies of the quantum corrections for the anisotropy parameter,$\eta(=\xi_R/\xi_B)$, for the improved actions, $\beta (C_0 L({Plaq.}) + C_1 L({Rect.}))$, are proceeded in the medium to strong coupling region on anisotropic lattices. The global features for the $\eta$ parameters as a function of $\beta$ and the coefficient $C_{1}$ have been clarified. It has been found by the perturbative analysis that as $C_1$ decreases, the slope of the $\eta(\beta)$ becomes less steep and for the actions whose $C_{1}$ is less than -0.160, $\eta$ decreases as $\beta$ decreases, contrary to the case of the standard action. In the medium to strong coupling region, the $\eta$ parameter begins to increase as $\beta$ decreases for all $C_{1}$. This means that for the actions with $C_{1} < -0.160$, the one-loop perturbative results for $\eta$ break down qualitatively and the $\eta$ parameters have a dip. As a result of this dip structure the $\eta$ for Iwasaki's action remains close to unity in the wide range of $\beta$.
Nakamura Atsushi
Saito Takuya
Sakai Sunao
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