Static quark anti-quark free and internal energy in 2-flavor QCD
  We study the change in free and internal energy due to the presence of a heavy quark anti-quark pair in a thermal heat bath in QCD with 2-flavors of staggered quarks at finite temperature. We discuss string breaking below as well as screening above the transition. Similarities and differences to the quenched case are discussed. 
Olaf Kaczmarek and Felix Zantow