Single Transverse Spin Asymmetry for Semi-Inclusive Deep Inelastic Scattering

Eguchi, Hisato; Koike, Yuji; Tanaka, Kazuhiro

Single Transverse Spin Asymmetry for Semi-Inclusive Deep Inelastic Scattering

Authors

Eguchi, Hisato

Koike, Yuji

Tanaka, Kazuhiro

Description

Establishing the twist-3 formalsim for the single transverse spin asymmetry, we present a complete single-spin-dependent cross section for SIDIS, $ep^\uparrow\to eπX$, associated with the twist-3 distribution for the transversely polarized nucleon. We emphasize that the consistency condition from the Ward identities for color gauge invariance is crucial to prove factorization property of the cross section.
Talk presented at SPIN 2006. 4 pages. Typos are corrected