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Azimuthal asymmetries at CLAS: Extraction of e^a(x) and prediction of A_{UL}

A. V. Efremov·K. Goeke·P. Schweitzer
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Abstract

First information on the chirally odd twist-3 proton distribution function e(x) is extracted from the azimuthal asymmetry, A_{LU}, in the electro-production of pions from deeply inelastic scattering of longitudinally polarized electrons off unpolarized protons, which has been recently measured by CLAS collaboration. Furthermore parameter-free predictions are made for azimuthal asymmetries, A_{UL}, from scattering of an unpolarized beam on a polarized proton target for CLAS kinematics.

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A. V. Efremov, K. Goeke, P. Schweitzer. 2002-08-13. Azimuthal asymmetries at CLAS: Extraction of e^a(x) and prediction of A_{UL}. https://doi.org/10.1103/physrevd.67.114014

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