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arXiv · hep-ph/0701255

Transverse spin effects of sea quarks in unpolarized nucleons

Zhun Lu·Bo-Qiang Ma·Ivan Schmidt
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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 $\cos 2 ϕ$ asymmetries in the unpolarized $pp$ and $p D$ Drell-Yan processes at FNAL E866/NuSea experiments. The prediction for the $\cos 2 ϕ$ asymmetries in the unpolarized $pp$ Drell-Yan process at the BNL Relativistic Heavy Ion Collider (RHIC) is also given.

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Zhun Lu, Bo-Qiang Ma, Ivan Schmidt. 2007-01-30. Transverse spin effects of sea quarks in unpolarized nucleons. https://doi.org/10.1103/physrevd.75.014026

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