Confinement and chiral symmetry breaking in heavy-light quark systems

Assuming a Gaussian approximation for the QCD gluodynamics, all the nonpert urbative physics can be encoded into two parameters: the gluon correlation length T-g and the gluon condensate G(2). These parameters are sufficient i n order to describe the heavy-heavy quark nonperturbative interaction. In t his work we adopt the same framework in order to study heavy-light bound st ates in the non-recoil limit. Spontaneous chiral symmetry breaking and a co nfining chiral non-invariant interaction emerge quite naturally. The gap eq uation is solved and discussed. In particular a relation between the light quark condensate and T-g is derived. The energy spectrum for the bound stat e equation is evaluated and commented. (C) 1998 Elsevier Science B.V. All r ights reserved.