Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-11-19
Phys.Rev.D79:016003,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, 17 figures, new materials and references added
Scientific paper
10.1103/PhysRevD.79.016003
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 $\alpha_s$. 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.
Kang Zhong-Bo
Qiu Jian-Wei
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