  We investigate the low-energy elastic DbarN interaction using a quark model
that confines color and realizes dynamical chiral symmetry breaking. The model
is defined by a microscopic Hamiltonian inspired in the QCD Hamiltonian in
Coulomb gauge. Constituent quark masses are obtained by solving a gap equation
and baryon and meson bound-state wave functions are obtained using a
variational method. We derive a low energy meson-nucleon potential from a
quark-interchange mechanism whose ingredients are the quark-quark and
quark-antiquark interactions and baryon and meson wave functions, all derived
from the same microscopic Hamiltonian. The model is supplemented with
(sigma,rho,omega,a0) single-meson exchanges to describe the long-range part of
the interaction. Cross-sections and phase shifts are obtained by iterating the
quark-interchange plus meson-exchange potentials in a Lippmann-Schwinger
equation. Once model parameters in meson exchange potential are fixed to
describe the low-energy experimental phase shifts of the K+N and K0N reactions,
predictions for Dbar0N and D-N reactions are obtained without introducing new
parameters.
