  The Regge behaviour of the solutions of a Dirac hamiltonian describing a
heavy quark-light quark system in high orbital angular momentum states is
analyzed. It is found that the solutions of a scalar confining potential are
physically admissible while those of a vector confining potential are not. It
is argued that with a Dirac hamiltonian a scalar confining potential is
preferred over a vector confining potential for any value of the orbital
angular momentum.
