Nucleon Structure Functions within a Chiral Soliton Model

We study nucleon structure functions within the bosonized Nambu–Jona–Lasinio model where the nucleon emerges as a chiral soliton. We discuss the model predictions on the Gottfried sum rule for electron–nucleon scattering. A comparison with a low–scale parametrization shows that the model reproduces the gross features of the empirical structure functions. We also compute the leading twist contributions of the polarized structure functions $g_1(x)$ and $g_2(x)$ in this model. We compare the model predictions on these structure functions with data from the E143 experiment by GLAP evolving them appropriately.