Strangeness Contribution to the Polarized Nucleon Structure Function g 1 ( x ) †

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 2 0. The leading order corrections to the scale dependence is computed along the QCD evolution program allowing to compare with data from SLAC. ————– † Supported by the Deutsche Forschungsgemeinschaft (DFG) under contract Re 856/2-3.