$k$ Strings from Various Perspectives: QCD, Lattices, String Theory and Toy Models
Abstract
Description
I review the status of the issue of the k-string tension in Yang-Mills theory. After a summary of known facts I discuss a weakly coupled four-dimensional Yang-Mills theory that supports non-Abelian strings and can, in certain aspects, serve as a toy model for QCD strings. In the second part of the talk I present original results obtained in a two-dimensional toy model which provides some evidence for the sine formula.
Based on invited talks at the Workshop Understanding Confinement/Zakharov-Fest, Ringberg Castle, Tegernsee, May 16-21, Germany, and the Cracow School of Theoretical Physics, Zakopane, Poland, June 3-12, 2005. 33 pages. v2: typos corrected, acknowledgments added, minor corrections in equations in Sect. 11
Based on invited talks at the Workshop Understanding Confinement/Zakharov-Fest, Ringberg Castle, Tegernsee, May 16-21, Germany, and the Cracow School of Theoretical Physics, Zakopane, Poland, June 3-12, 2005. 33 pages. v2: typos corrected, acknowledgments added, minor corrections in equations in Sect. 11