  The model for constituent glue is presented starting from the perturbation
theory in nonperturbative QCD vacuum. Green function is constructed for a
system containing qqbar pair and gluon propagating in the vacuum background
field, and Hamiltonian approach to the problem is formulated. The masses of
lowest qqbarg hybrids with light quarks are evaluated, and implication of
results for the spectroscopy of exotic states is discussed.
