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Using a previous extraction of the quark Boer-Mulders distributions fromsemiinclusive deep inelastic scattering data, we fit the unpolarized Drell-Yandata on the $\cos 2 \phi$ asymmetry, determining the antiquark Boer-Muldersdistributions. A good agreement with the data is found in the region of low$q_T$, where the transverse-momentum factorization approach applies.

Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks