Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-09-22
PoS LAT2005 (2005) 278
Physics
High Energy Physics
High Energy Physics - Lattice
LAT05 proceedings; 6 pages, 2 figures, uses PoS.cls
Scientific paper
We investigate the properties of the QCD string in the Euclidean SU(N) pure gauge theory when the space-time dimensions transverse to it are periodic. We propose a generalisation of the Luscher-Weisz effective string action for the flux-tube energy levels at finite L_perp. As the size of one transverse dimension is varied, we predict a Kosterlitz-Thouless transition of the worldsheet field theory driven by vortices, after which the periodic component of the worldsheet displacement vector develops a mass gap and the effective central charge drops by one unit. The universal properties of the transition are emphasized.
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