Bound states of singlet quarks at LHC
  We discuss the discovery potential of the bound states of singlet quarks at LHC. We find that it is possible to discover bound states of singlet quarks at LHC with singlet quark masses up to 300 Gev for $e_{Q} = \frac{2}{3}$ and up to 200 Gev for $e_{Q} = -\frac{1}{3}$. 
N.V.Krasnikov