Anti-Hyperon polarization in high energy pp collisions with polarized beams

Details Anti-Hyperon polarization in high energy pp collisions with polarized beams Anti-Hyperon polarization in high energy pp collisions with polarized beams

2007-07-04

arxiv.org/abs/0707.0534v2

Phys.Rev.D78:054007,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 9 figures,version to appear in PRD

Scientific paper

10.1103/PhysRevD.78.054007

We study the longitudinal polarization of the Sigma_bar and Xi_bar anti-hyperons in polarized high energy pp collisions at large transverse momenta, extending a recent study for the Lambda_bar anti-hyperon. We make predictions by using different parametrizations of the polarized parton densities and models for the polarized fragmentation functions. Similar to the Lambda_bar polarization, the Xi_bar0 and Xi_bar+ polarizations are found to be sensitive to the polarized anti-strange sea in the nucleon. The Sigma_bar- and Sigma_bar+ polarizations show sensitivity to the light sea quark polarizations, \Delta \bar u(x) and \Delta \bar d(x), and their asymmetry.

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