Model Calculation of Nucleon Structure Functions
Abstract
Deep inelastic polarized and unpolarized structure functions for a free nucleon are obtained in a modified Center-of-Mass bag model, which includes the symmetry breaking effects from spin-dependent interactions. The quark distribution functions, calculated at Q02 (0.9GeV/c)2, are evolved to higher Q2 region and compared with the data and other models. The model gives a reasonable description for the valence part of the structure functions at x>0.3. For small-x region, the contributions from the sea are necessary. The spin-dependent effects are important in describing the existing data.
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