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arXiv · 1308.1159

Azimuthal asymmetries in semi-inclusive DIS with polarized beam and/or target and their nuclear dependences

Yu-kun Song·Jian-hua Gao·Zuo-tang Liang·Xin-Nian Wang
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Abstract

Using the formalism obtained from collinear expansion, we calculate the differential cross section and azimuthal asymmetries in semi-inclusive deeply inelastic lepton-nucleon (nucleus) scattering process $e^-+N (A) \to e^-+q+X$ with both polarized beam and polarized target up to twist-3. We derive the azimuthal asymmetries in terms of twist-3 parton correlation functions. We simplify the results by using the QCD equation of motion that leads to a set of relationships between different twist-3 functions. We further study the nuclear dependence of azimuthal asymmetries and show that they have similar suppression factors as those in the unpolarized reactions.

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Yu-kun Song, Jian-hua Gao, Zuo-tang Liang, Xin-Nian Wang. 2013-12-05. Azimuthal asymmetries in semi-inclusive DIS with polarized beam and/or target and their nuclear dependences. https://doi.org/10.1103/physrevd.89.014005

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