The density profile of the QCD flux tube is investigated within the framework of the L\"uscher-Weisz (LW) string action with two boundary terms. The transverse action profile and potential between static quarks are considered using Wilson's loop overlap formalism at zero temperature in SU(2) Yang-Mills theory. We find the predictions of the LW string matching the lattice data for the width of the energy-density and QQˉ potential up to a small color-source separation of R=0.32\,fm.
@article{arxiv.2210.04586,
title = {Intermediate-Distance String Effects in Wilson Loops\\ via Boundary Action},
author = {M. N. Khalil and A. M. Khalaf and A. S. Bakry and M. Deliyergiyev and A. A. Galal and M. Kotb and M. D. Okasha and G. S. M. Ahmed},
journal= {arXiv preprint arXiv:2210.04586},
year = {2023}
}