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arXiv · 1002.2468

The longitudinal polarization of hyperons in the forward region in polarized $pp$ collisions

Wei Zhou·Shan-shan Zhou·Qing-hua Xu
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Abstract

We study the longitudinal polarization of hyperons and anti-hyperons at forward pseudorapidity, $2.5<η<4$, in singly polarized $pp$ collisions at RHIC energies by using different parameterizations of the polarized parton densities and different models for the polarized fragmentation functions. The results show that the $Σ^+$ polarization is able to distinguish different pictures on spin transfer in high energy fragmentation processes; and the polarization of $Λ$ and $\barΛ$ hyperons can provide sensitivity to the helicity distribution of strange sea quarks. The influence from beam remnant to hyperon polarization in the forward region is also discussed.

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Wei Zhou, Shan-shan Zhou, Qing-hua Xu. 2010-02-12. The longitudinal polarization of hyperons in the forward region in polarized $pp$ collisions. https://doi.org/10.1103/physrevd.81.057501

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