Single-spin asymmetries and soft-gluon poles

Details Single-spin asymmetries and soft-gluon poles Single-spin asymmetries and soft-gluon poles

2001-06-23

arxiv.org/abs/hep-ph/0106260v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk presented at the conference DIS2001 held at Bologna, Italy from April 27 to May 1, 2001. 4 pages with 2 figures in Latex

Scientific paper

Mechanism for the single transverse spin asymmeties in the pion production, p^\uparrow + p'\to \pi(\ell_T) + X, and the \Lambda hyperon polarization, p + p' \to \Lambda^\uparrow (\ell_T)+ X, is investigated in the framework of QCD factorization theorem. We identify all the soft-gluon pole contributions coming from the twist-3 distribution and/or fragmentation functions and show that they give rise to large asymmetries at large x_F.

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