Abstract
The three flavor version of the Nambu–Jona–Lasinio chiral soliton model for baryons is employed to calculate the twist–2 contribution to the polarized nucleon structure function g 1( x). In particular the role of the strange quark degree of freedom as a collective excitation of the chiral soliton is investigated in the context of flavor symmetry breaking. The model prediction for g 1( x) refers to a low momentum scale Q 0 2. The leading order corrections to the scale dependence is computed along the QCD evolution program allowing to compare with data from SLAC.
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