HEAVY-QUARK SOLITONS - TOWARDS REALISTIC MASSES

A generalization of the effective meson lagrangian possessing the heav y-quark symmetry to finite meson masses is employed to study the meson mass dependence of the spectrum of Sand P-wave baryons containing one heavy quark or anti-quark. These baryons are described as respectivel y heavy mesons or anti-mesons bound in the background of a soliton, wh ich is constructed from light mesons. No further approximation is made to solve the bound-state equation. For special cases it is shown that the boundary conditions. which have to be satisfied by the bound-stat e wave functions and stem from the interaction with the light mesons, may impose additional constraints on the existence of bound states whe n finite masses are assumed. Two types of models supporting soliton so lutions for the light mesons are considered: the Skyrme model of pseud oscalars only as well as an extension containing also light vector mes ons. It is shown that only the Skyrme model with vector mesons provide s a reasonable description of both light and heavy baryons. Kinematica l corrections to the bound-state equations are included in the discuss ion.