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arXiv · 0811.3101

Evolution of twist-3 multi-parton correlation functions relevant to single transverse-spin asymmetry

Zhong-Bo Kang·Jian-Wei Qiu
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Abstract

We constructed two sets of twist-3 correlation functions that are responsible for generating the novel single transverse-spin asymmetry in the QCD collinear factorization approach. We derive evolution equations for these universal three-parton correlation functions. We calculate evolution kernels relevant to the gluonic pole contributions to the asymmetry at the order of $α_s$. We find that all evolution kernels are infrared safe as they should be and have a lot in common to the DGLAP evolution kernels of unpolarized parton distributions. By solving the evolution equations, we explicitly demonstrate the factorization scale dependence of these twist-3 correlation functions.

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Zhong-Bo Kang, Jian-Wei Qiu. 2008-12-03. Evolution of twist-3 multi-parton correlation functions relevant to single transverse-spin asymmetry. https://doi.org/10.1103/physrevd.79.016003

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