出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In the context of conning gauge theories we study the ux tube generated by a pair of static
sources belonging to higher rank representations of the gauge group. Using a simple geometric
approach based on minimal surfaces describing the world-sheet of the underlying k-string, we
infer logarithmic broadening of the ux tube as a function of source separation. It turns out that
the coefcient of the logarithm does not depend on the specic representation of the source nor on
its N-ality and is universal. Numerical results on a Z4 gauge theory in three dimensions with static
sources carrying two units of elementary ux compare very favourably with these predictions.
