String breaking in zero-temperature lattice QCD
  The crossing from a static quark-antiquark system to a system of two static-light mesons when the separation of the static quarks is increased is calculated in zero-temperature lattice QCD. The mixing of these two states is extracted from the lattice operators. We also discuss the breaking of an excited string of a hybrid meson. 
UKQCD Collaboration: P. Pennanen and C. Michael