Subleading properties of the QCD flux-tube in 3-d lattice gauge theory

Abstract

We study the continuum limit of the string-like behaviour of flux tubes formed between static quarks and anti-quarks in three dimensional SU(2) lattice gauge theory. We compare our simulation data with the predictions of both effective string mo dels as well as perturbation theory. On the string side we obtain clear evidence for convergence of data to predictions of Nambu-Goto theory. We comment on the scales at which the static potential starts departing from one loop perturbation theory and then again being well described by effective string theories. We also estimate the leading corrections to the one-loop perturbative poten tial as well as the Nambu-Goto effective string. In the intermediate regions we find an empirical form ula which gives surprisingly good fits.