1 M(C) EXPANSION OF OMEGA(B)(ASTERISK)-]OMEGA(C)(ASTERISK) SEMILEPTONIC DECAY FORM-FACTORS/

A simple model of OMEGA(Q)() baryons containing one heavy quark Q is constructed. Amplitudes are represented by loop graphs with one line f or the heavy quark and another for the light degrees of freedom. The l atter are modelled as a freely propagating vector particle interacting nonlocally with the heavy baryon and a free heavy quark. It is argued that the physics of confinement plays an inessential role in determin ing semileptonic decay form factors. The model has a well-defined heav y-quark expansion which has a form consistent (through order 1/m(Q)) w ith that determined by QCD through the heavy-quark effective theory. T he slope of the Isgur-Wise function is consistent with the Bjorken sum rule bound. The effect of the OMEGA(Q)2 - OMEGA(Q) mass splitting o n the first-order form factors is examined.