Nucleon parton distributions in the large Nc limit
Abstract
We review recent progress in calculating the twist--2 parton distribution functions at a low normalization point in the large--Nc limit, where the nucleon can be described as a soliton of the effective chiral lagrangian. This field-theoretic approach preserves all general requirements on the distribution functions (positivity, normalization etc.). In particular, it allows to calculate the polarized and unpolarized antiquark distributions at the low normalization point.
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