The Width of the Colour Flux Tube
M. Caselle, F. Gliozzi, U. Magnea, S. Vinti

TL;DR
This paper explores the logarithmic growth of the width of the colour flux tube with interquark distance, supported by data from 3D gauge theory and Ising model interface physics, highlighting a universal behavior.
Contribution
It provides a general derivation of the flux tube width growth and demonstrates its consistency with recent high-precision data from gauge theory and statistical models.
Findings
Logarithmic growth of flux tube width confirmed over large distances
Data from 3D Z2 gauge theory aligns with theoretical predictions
Interface physics of the 3D Ising model supports the flux tube behavior
Abstract
We discuss and rederive in a general way the logarithmic growth of the mean squared width of the colour flux tube as a function of the interquark separation. Recent data on 3D gauge theory, combined with high precision data on the interface physics of the 3D Ising model fit nicely this behaviour over a range of more than two orders of magnitude.
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