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On the twist-3 contribution to hL in the instanton vacuum

B. Dressler, M. V. Polyakov

hep-pharXiv:hep-ph/9912376

Abstract

We show that the instanton model of the QCD vacuum indicates the parametric smallness of the twist-3 contributions to the polarized structure function hL. This smallness is related to the diluteness of the QCD instanton vacuum.

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