ar X iv : h ep - p h / 02 07 23 3 v 1 1 8 Ju l 2 00 2 SPIN STRUCTURE FUNCTIONS IN CHIRAL QUARK

In this talk I review studies of hadron structure functions in bosonized chiral quark models. Such models require regularization and I show that the two–fold Pauli– Villars regularization scheme not only fully regularizes the effective action but also leads the scaling laws for structure functions. This scheme is consistent with other computations of the pion structure function in that model. For the nucleon structure functions the present approach serves to determine the regularization prescription for structure functions whose leading moments are not given by matrix elements of local operators. Some numerical results are presented for the spin structure functions and the role of strange quarks is addressed.