  The current limits for fourth generation quarks allows to expect their mass
of the order of 500 GeV. In this mass region for quark-anti-quark pair the
additional Yukawa-type attraction due to Higgs mechanism is expected to emerge.
This Higgs induced attraction greatly exceeds strong interaction between quarks
and leads to the formation of bound states in both colour octet $S^{(8)}$ and
singlet $S^{(1)}$ states. In the key of recent works on significance of colour
octet channel for production of colour singlet state of fourth generation
$Q\bar{Q}$ we calculated the binding energies for both octet and singlet
states. Such attraction localizes quarks in extremely small area. Hence colour
octet pair of fourth generation quarks can form the "nucleus" and together with
colour neutralizing light particle that is captured by strong interaction in
orbit around the nucleus, create particle, similar by its structure to
Deuterium.
