Collinear Factorization for Single Transverse-Spin Asymmetry in Drell-Yan Processes
arXiv:1111.3717 · doi:10.1103/PhysRevD.85.114011
Abstract
We study the scattering of a single parton state with a multi-parton state to derive the complete results of perturbative coefficient functions at leading order, which appear in the collinear factorization for Single transverse-Spin Asymmetry(SSA) in Drell-Yan processes with a transversely polarized hadron in the initial state. We find that the factorization formula of SSA contains hard-pole-, soft-quark-pole- and soft-gluon-pole contributions. It is interesting to note that the leading order perturbative coefficient functions of soft-quark-pole- and soft-gluon-pole contributions are extracted from parton scattering amplitudes at one-loop, while the functions of hard-pole contributions are extracted from the tree level amplitudes at tree-level. Our method to derive the factorization of SSA is different than the existing one in literature. A comparison of our results with those obtained by other method is made.
27 pages, 14 figures, text improved, to appear in Phys. Rev. D
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Cited by in corpus (7)
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- Scale Dependence of Twist-3 Quark-Gluon Operators for Single Spin Asymmetries
- QCD Corrections of All Structure Functions in Transverse Momentum Dependent Factorization for Drell-Yan Processes
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- A Note on Pretzelosity TMD Parton Distribution
- QCD Evolutions of Twist-3 Chirality-Odd Operators