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Single-spin asymmetries and soft-gluon poles | | Yuji Koike
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23 Jun 2001 | | Subject: | hep-ph | | Affiliation: | Niigata Univ. | | Abstract: | Mechanism for the single transverse spin asymmeties in the pion production, p^uparrow + p’ o pi(ell_T) + X, and the Lambda hyperon polarization, p + p’ o 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. | | Source: | arXiv, hep-ph/0106260 | | Services: | Forum | Review | PDF | Favorites | |
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