Abstract
We study double spin asymmetries in Drell-Yan processes in which one initial hadron is transversely polarized and another one is longitudinally polarized. The complete part of the hadronic tensor relevant to asymmetries is derived. This part consists of twist-2 and twist-3 parton distributions and is gauge invariant. We construct some observables which can be used to extract these parton distributions from experimental measurements.
Highlights
Predictions about high energy scattering of hadrons of large momentum transfers can be made with QCD factorizations
At the leading power of the inverse of large momentum transfers, cross sections can be predicted with collinear twist-2 parton distributions convoluted with perturbative coefficient functions
We study with QCD collinear factorization double-spin asymmetries in Drell-Yan processes, where one initial hadron is transversely polarized and another is longitudinally polarized
Summary
Predictions about high energy scattering of hadrons of large momentum transfers can be made with QCD factorizations. At the leading power of the inverse of large momentum transfers, cross sections can be predicted with collinear twist-2 parton distributions convoluted with perturbative coefficient functions. These parton distributions contain information about inner structures of hadrons and are nonperturbative. We study with QCD collinear factorization double-spin asymmetries in Drell-Yan processes, where one initial hadron is transversely polarized and another is longitudinally polarized. It is expected that such collinear divergences can be factorized into various parton distributions, as shown in an explicit calculation of one-loop correction to single transverse-spin asymmetries at twist-3 of Drell-Yan processes in [10].
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