Precision computation of a low-energy reference scale in quenched lattice QCD

Abstract

We present results for the reference scale r_0 in SU(3) Lattice Gauge Theory for beta = 6/g_0^2 in the range 5.7 <= beta <= 6.57. The high relative accuracy of 0.3-0.6% in r_0/a was achieved through good statistics, the application of a multi-hit procedure and a variational approach in the computation of Wilson loops. A precise definition of the force used to extract r_0 has been used throughout the calculation which guarantees that r_0/a is a smooth function of the bare coupling and that subsequent continuum extrapolations are possible. The results are applied to the continuum extrapolations of the energy gap Delta in the static quark potential and the scale L_max/r_0 used in the calculation of the running coupling constant.

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References in corpus (3)

• Accurate Scale Determinations for the Wilson Gauge Action
• The Effectiveness of Non-Perturbative O(a) Improvement in Lattice QCD
• Theoretical advances in lattice QCD

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