Abstract
We have performed a systematic study of the static quark-antiquark potential in the presence of light dynamical fermions. The potential has been extracted from measurements of Wilson line correlation functions on a 16[sup 3][times]4 lattice. In the low-temperature QCD phase the effects of dynamical fermions on the confining quark potential are demonstrated. In the high-temperature plasma phase we analyze the screening mass for different quark masses and different numbers of flavors at a range of temperatures. It is found that the inclusion of dynamical fermions enhances screening effects significantly. The screening mass shows a strong temperature dependence and our results suggest that [ital J]/[psi] suppression might be effective for temperatures [ital T][congruent][ital T][sub [ital c]].
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