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arXiv · 1005.1468

New Analysis of the Single Transverse-Spin Asymmetry for Hadron Production at RHIC

Koichi Kanazawa·Yuji Koike
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Abstract

We analyze the single transverse-spin asymmetry (SSAs) for inclusive hadron production in the $pp$ collision at RHIC based on the twist-3 mechanism in QCD. As an origin of SSAs, we take into account of all kinds of pole contributions associated with the twist-3 quark-gluon correlation functions in the polarized proton. By the inclusion of the soft-fermion-pole contribution in addition to the soft-gluon-pole contribution, we find SSAs observed at RHIC are better described for all kinds of mesons. $P_T$-dependence of the asymmetry and the comparison with the FNAL data are also presented.

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Koichi Kanazawa, Yuji Koike. 2010-07-15. New Analysis of the Single Transverse-Spin Asymmetry for Hadron Production at RHIC. https://doi.org/10.1103/physrevd.82.034009

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