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Contribution of the twist-3 fragmentation function to single transverse-spin asymmetry in SIDIS (1307.0023v1)
Published 28 Jun 2013 in hep-ph
Abstract: We study the contribution of the twist-3 fragmentation function to the single transverse-spin asymmetry in SIDIS within the framework of the collinear factorization. Using the Ward-Takahashi identity in QCD, we establish the collinear twist-3 formalism in the Feynman gauge to calculate its non-pole contribution to the asymmetry.
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