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arXiv · hep-ph/9909489

Helicity skewed quark distributions of the nucleon and chiral symmetry

M. Penttinen·M. V. Polyakov·K. Goeke
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Abstract

We compute the helicity skewed quark distributions $\widetilde{H}$ and $\widetilde{E}$ in the chiral quark-soliton model of the nucleon. This model emphasizes correctly the role of spontaneously broken chiral symmetry in structure of nucleon. It is based on the large-N_c picture of the nucleon as a soliton of the effective chiral lagrangian and allows to calculate the leading twist quark- and antiquark distributions at a low normalization point. We discuss the role of chiral symmetry in the helicity skewed quark distributions $\widetilde{H}$ and $\widetilde{E}$. We show that generalization of soft pion theorems, based on chiral Ward identities, leads in the region of -ξ< x < ξto the pion pole contribution to $\widetilde{E}$ which dominates at small momentum transfer.

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M. Penttinen, M. V. Polyakov, K. Goeke. 1999-09-23. Helicity skewed quark distributions of the nucleon and chiral symmetry. https://doi.org/10.1103/physrevd.62.014024

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