Anti-Hyperon polarization in high energy pp collisions with polarized beams
High Energy Physics - Phenomenology
2009-01-09 v2
Abstract
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.
Keywords
Cite
@article{arxiv.0707.0534,
title = {Anti-Hyperon polarization in high energy pp collisions with polarized beams},
author = {Ye Chen and Zuo-tang Liang and Ernst Sichtermann and Qing-hua Xu and Shan-shan Zhou},
journal= {arXiv preprint arXiv:0707.0534},
year = {2009}
}
Comments
17 pages, 9 figures,version to appear in PRD