String breaking in Lattice QCD
  The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or string, which should break in the presence of light quark-antiquark pairs. This expected zero temperature phenomenon has proven elusive in simulations of lattice QCD. We present simulation results that show that the string does break in the confining phase at nonzero temperature. 
E. Laermann, C. DeTar, O. Kaczmarek and F. Karsch