Super-heavy Quarkonia and the Gluon Condensate
  The early idea that a non-perturbative gluon condensate affects the spectrum of heavy quarks is revisited in the light of modern simulation techniques. We evaluate the low lying spectrum of bound states of two heavy quarks for large hypothetical quark mass, m_Q > m_b, using non-relativistic QCD and compare with other models to test the consistency. 
Jochen Fingberg (CCRLE St.Augustin, NEC Europe Ltd.)