Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-30
Phys.Atom.Nucl. 68 (2005) 558-566; Yad.Fiz. 68 (2005) 588-596
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, no figures, REVTeX 4; Invited contribution to the collection of articles devoted to the 70th birthday of Yu.A. Simon
Scientific paper
10.1134/1.1903085
Field correlators and the string representation are used as two complementary approaches for the description of confinement in the SU(N)-inspired dual Abelian-Higgs-type model. In the London limit of the simplest, SU(2)-inspired, model, bilocal electric field-strength correlators have been derived with accounting for the contributions to these averages produced by closed dual strings. The Debye screening in the plasma of such strings yields a novel long-range interaction between points lying on the contour of the Wilson loop. This interaction generates a Luescher-type term, even when one restrics oneself to the minimal surface, as it is usually done in the bilocal approximation to the stochastic vacuum model. Beyond the London limit, it has been shown that a modified interaction appears, which becomes reduced to the standard Yukawa one in the London limit. Finally, a string representation of the SU(N)-inspired model with the theta-term, in the London limit, can be constructed.
Antonov Dmitri
Ebert Dietmar
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