2019/09/18 by Christova, E., Kotlorz, D., Leader, E.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1909.08218
At present, the Boer-Mulders function for a given quark flavour has been extracted from data on semi-inclusive deep inelastic scattering using the simplifying, but theoretically inconsistent, assumption that it is proportional to the Sivers function for each quark flavour. In this paper, using the latest semi-inclusive deep inelastic COMPASS deuteron data on the ⟨cosϕh⟩ and ⟨cos 2 ϕh⟩ asymmetries we extract the collinear xB-dependence of the Boer-Mulders function for the sum of the valence quarks QV=uV + dV in an essentially model independent way, and find a significant disagreement with the published results. Our analysis also yields interesting information on the transverse momentum dependence of the unpolarized quark distribution and fragmentation functions.