Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS

Details Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS

2009-07-16

arxiv.org/abs/0907.2797v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures. To appear in the proceedings of the XVII International Workshop on Deep-Inelastic Scattering and Related S

Scientific paper

We discuss the single-spin asymmetry in semi-inclusive DIS, $e p^\uparrow \to e \pi X$, based on the twist-3 mechanism in the collinear factorization relevant for the pion production with the large transverse-momentum. This updates our previous study by including, in particular, the contributions induced by the novel partonic subprocesses, and allows us to derive the entire formula for the corresponding single-spin asymmetry associated with a complete set of the twist-3 quark-gluon correlation functions in the transversely polarized nucleon. We discuss the correspondence with the results obtained by the transverse-momentum-dependent factorization relevant for the pion production with the low transverse-momentum.

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