$A_N$ in inclusive lepton-proton collisions: TMD and twist-3 approaches

Abstract

We consider the inclusive production of hadrons in lepton-nucleon scattering. For a transversely polarized nucleon this reaction shows a left-right azimuthal asymmetry, which we compute this asymmetry in both TMD and in twist-3 collinear factorization formalisms. All non-perturbative parton correlators of the calculation are fixed through information from other hard processes. Our results for the left-right asymmetry agree in sign with recent data for charged pion production from the HERMES Collaboration and from Jefferson Lab. We discuss similarities and differences of two formalisms.

arXiv comment6 pages, 4 figures, to appear in the proceedings of the TRANSVERSITY 2014, Chia, Italy, 9-13 June, 2014

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Cited by in corpus (1)

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