Speaker
Koichi Kanazawa
(Niigata University)
Description
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 identities in QCD,
we establish the collinear twist-3 formalism in the Feynman gauge to
calculate this contribution with manifest color gauge invariance. Then
we present a complete single-spin-dependent cross section formula
for SIDIS in the leading-order QCD perturbation theory.
Authors
Koichi Kanazawa
(Niigata University)
Prof.
Yuji Koike
(Niigata University)
