Electron shielding of vortons in high-density quark matter
  We consider the the effect of the electron cloud about a vorton in the CFL-$K^0$ high-density phase by numerically solving the ultrarelativistic Thomas-Fermi equation about a toroidal charge. Including electrons removes the electric monopole contribution to the energy, and noticeably decreases the equilibrium radius of these stable vortex loops. 
Paulo F. Bedaque, Evan Berkowitz, Geoffrey Ji, Nathan Ng
nucl-th astro-ph.SR hep-ph