Transverse spin effects of sea quarks in unpolarized nucleons

Abstract

We calculate the non-zero Boer-Mulders functions of sea quarks inside the proton in a meson-baryon fluctuation model. The results show that the transverse spin effects of sea quarks in an unpolarized nucleon are sizable. Using the obtained antiquark Boer-Mulders functions, we estimate the $\cos 2\varphi$ asymmetries in the unpolarized $pp$ and $pD$ Drell-Yan processes at FNAL E866/NuSea experiments. The prediction for the $\cos 2\varphi$ asymmetries in the unpolarized $pp$ Drell-Yan process at the BNL Relativistic Heavy Ion Collider (RHIC) is also given.

arXiv comment7 pages, 5 figures, to appear in Physical Review D

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Cited by in corpus (11)

• Distribution Functions of the Nucleon and Pion in the Valence Region
• Dilepton production from polarized hadron hadron collisions
• Extracting Boer-Mulders functions from $p+D$ Drell-Yan processes
• Updating Boer-Mulders functions from unpolarized pd and pp Drell-Yan data
• Azimuthal asymmetries in lepton-pair production at a fixed-target experiment using the LHC beams (AFTER)
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Boer-Mulders effect in the unpolarized pion induced Drell-Yan process at COMPASS within TMD factorization
• Boer-Mulders function of pion meson and $q_T$-weighted $\cos 2\varphi$ asymmetry in the unpolarized ${\pi }^{-}p$ Drell-Yan at COMPASS
• Influence of Low Energy Hadronic Interactions on Air-shower Simulations
• The $\cos 2\varphi$ azimuthal asymmetry of unpolarized dilepton production at the $Z$-pole
• The $\sin 2\varphi$ azimuthal asymmetry in single longitudinally polarized $\pi N$ Drell-Yan process