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

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

2010-02-12

arxiv.org/abs/1002.2468v1

Phys.Rev.D81:057501,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures

Scientific paper

10.1103/PhysRevD.81.057501

We study the longitudinal polarization of hyperons and anti-hyperons at forward pseudorapidity, $2.5<\eta<4$, 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 $\Sigma^+$ polarization is able to distinguish different pictures on spin transfer in high energy fragmentation processes; and the polarization of $\Lambda$ and $\bar\Lambda$ 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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