Effective string picture for confinement at finite temperature: theoretical predictions and high precision numerical results

Physics – High Energy Physics – High Energy Physics - Lattice

Scientific paper

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Lattice2003(nonzero), 3 pages, 2 figures

Scientific paper

10.1016/S0920-5632(03)02652-5

The effective string picture of confinement is used to derive theoretical predictions for the interquark potential at finite temperature. At short distances, the leading string correction to the linear confining potential between a heavy quark-antiquark pair is the "L\"uscher term''. We assume a Nambu--Goto effective string action, and work out subleading contributions in an analytical way. We discuss the contribution given by a possible ``boundary term'' in the effective action, comparing these predictions with results from simulations of lattice $Z_2$ gauge theory in three dimensions, obtained with an algorithm which exploits the duality of the $Z_2$ gauge model with the Ising spin model.

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