1307.0023 (Koichi Kanazawa et al.)

Contribution of the twist-3 fragmentation function to single
transverse-spin asymmetry in SIDIS    [PDF]

Koichi Kanazawa, Yuji Koike

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.

View original: http://arxiv.org/abs/1307.0023