Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks
Abstract
Using a previous extraction of the quark Boer-Mulders distributions from semiinclusive deep inelastic scattering data, we fit the unpolarized Drell-Yan data on the 2 φ asymmetry, determining the antiquark Boer-Mulders distributions. A good agreement with the data is found in the region of low qT, where the transverse-momentum factorization approach applies.
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