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Broadening of the confining flux tube joining higher-representation sources

Ferdinando Gliozzi·Pietro Giudice·Stefano Lottini
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Abstract

In the context of confining gauge theories we study the flux 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 flux tube as a function of source separation. It turns out that the coefficient of the logarithm does not depend on the specific representation of the source nor on its N-ality and is universal. Numerical results on a Z_4 gauge theory in three dimensions with static sources carrying two units of elementary flux compare very favourably with these predictions.

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Ferdinando Gliozzi, Pietro Giudice, Stefano Lottini. 2006-11-27. Broadening of the confining flux tube joining higher-representation sources. https://arxiv.org/abs/hep-lat/0609060

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