Confining string and P-vortices in the indirect Z(2) projection of SU(2)   lattice gauge theory
  We study the distribution of P-vortices near the confining string in the indirect Z(2) projection of SU(2) lattice gauge theory. It occurs that the density of vortices is constant at large distances and strongly suppressed near the line connecting the test quark-antiquark pair. This means that the condensate of P-vortices is broken inside the confining string. We also find that the width of the P-vortex density distribution is proportional to the logarithm of the distance between the quark and antiquark. 
V. G. Bornyakov, A. V. Kovalenko, M. I. Polikarpov, D. A. Sigaev