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We present results on the static qq potential from high-statistics simulations on 16^4, 24^332, and 32^4 lattices, using the standard Wilson action at =6. 0, 6. 2, and 6. 4 on the Connection Machine CM2. To decrease noise and increase accuracy, we applied a suitable local smoothing technique on the spatial parts of Wilson loop operators. As a result, we find a violation of asymptotic scaling of the string tension, as signaled by {}{₋}=96. 7 (1. 6) (2. 6), 86. 4 (1. 0) (1. 9), 82. 3 (0. 8) (1. 7), for the three values, with statistical and systematic errors. We observe a linear confining potential up to distances of 2 fm. A volume of (1. 5{0ex{0ex}fm) }^3 appears to be sufficient to avoid finite-size effects within our statistical accuracy (1%).
Bali et al. (Tue,) studied this question.