Twist-3 Single-Spin Asymmetry for SIDIS and its Azimuthal Structure

Details Twist-3 Single-Spin Asymmetry for SIDIS and its Azimuthal Structure Twist-3 Single-Spin Asymmetry for SIDIS and its Azimuthal Structure

2009-01-19

arxiv.org/abs/0901.2760v1

AIP Conf.Proc.1149:475-478,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures; to appear in the proceedings of the 18th International Symposium on Spin Physics (SPIN2008), October 6 - 1

Scientific paper

10.1063/1.3215692

We derive the complete twist-3 single-spin-dependent cross section for semi-inclusive DIS, $ep^\uparrow\to e\pi X$, associated with the complete set of the twist-3 quark-gluon correlation functions in the transversely polarized nucleon, extending our previous study. The cross section consists of five independent structure functions with different azimuthal dependences, consistently with the transverse-momentum-dependent (TMD) factorization approach in the low $q_T$ region. Correspondence with the inclusive DIS limit and comparison with the TMD approach are briefly discussed.

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