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

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

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, Δ\bar u(x) and Δ\bar d(x), and their asymmetry.
17 pages, 9 figures,version to appear in PRD

Keywords

High Energy Physics - Phenomenology

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/215149

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.0534
 http://arxiv.org/abs/0707.0534
 Phys.Rev.D78:054007,2008
 doi:10.1103/PhysRevD.78.054007

Collections

arXiv