  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 $Q\bar{Q}$ potential up to a small
color-source separation of $R=0.32$\,fm.
