QCD String Structure in Vector Confinement
  We demonstrate that the Nambu-Goto string spectroscopy with massless quarks is replicated in highly excited states of the linear vector confinement potential. For deep radial excitations we observe that the Regge slope, spacing between daughter trajectories, and absolute state energies agree with those of the QCD string. 
Theodore J. Allen, Todd Coleman, M. G. Olsson, Sinisa Veseli