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arXiv · hep-ph/9806356

Single Transverse-Spin Asymmetries in Hadronic Pion Production

Jianwei Qiu·George Sterman
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Abstract

We analyze single transverse-spin asymmetries for hadronic pion production at large transverse momenta using QCD factorization. In the large $x_F$ region, leading contributions to the asymmetries are naturally produced by twist-3 parton correlation functions that couple quark fields and gluon field strengths. With a simple model for these matrix elements, leading-order asymmetries calculated from QCD are consistent with data on pion production from Fermilab, and can be used to predict single-spin asymmetries at RHIC. We argue that our perturbative calculation for the asymmetries is relevant to pion transverse momenta as low as a few GeV.

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Jianwei Qiu, George Sterman. 1998-06-12. Single Transverse-Spin Asymmetries in Hadronic Pion Production. https://doi.org/10.1103/physrevd.59.014004

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