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arXiv · hep-th/0612131

Quantum broadening of k-strings in gauge theories

Pietro Giudice·Ferdinando Gliozzi·Stefano Lottini
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Abstract

We study the thickness of the confining flux tube generated by a pair of sources in higher representations of the gauge group. Using a simple geometric picture we argue that the area of the cross-section of the flux tube, as measured by a Wilson loop probe, grows logarithmically with source separation, as a consequence of the quantum fluctuations of the underlying k-string. The slope of the logarithm turns out to be universal, i.e. it is the same for all the representations and all the gauge theories. We check these predictions in a 3D Z_4 lattice gauge model by comparing the broadening of the 1-string and the 2-string.

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Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini. 2006-12-13. Quantum broadening of k-strings in gauge theories. https://doi.org/10.1088/1126-6708%2F2007%2F01%2F084

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