Anti-Hyperon polarization in high energy pp collisions withpolarized beams

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We study the longitudinal polarization of the {bar {Sigma}}{sup -}, {bar {Sigma}}{sup +}, {bar {Xi}}{sup 0} and {bar {Xi}}{sup +} anti-hyperons in polarized high energy pp collisions at large transverse momenta, extending a recent study for the {bar {Lambda}} antihyperon. We make predictions by using different parameterizations of the polarized parton densities and models for the polarized fragmentation functions. Similar to the {bar {Lambda}} polarization, the {bar {Xi}}{sup 0} and {bar {Xi}}{sup +} polarizations are found to be sensitive to the polarized anti-strange sea, {Delta}{bar s}(x), in the nucleon. The {bar {Sigma}}{sup -} and {bar {Sigma}}{sup +} polarizations show sensitivity ... continued below

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Chen, Ye; Liang, Zuo-tang; Sichtermann, Ernst; Xu, Qing-hua & Zhou, Shan-shan November 20, 2007.

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We study the longitudinal polarization of the {bar {Sigma}}{sup -}, {bar {Sigma}}{sup +}, {bar {Xi}}{sup 0} and {bar {Xi}}{sup +} anti-hyperons in polarized high energy pp collisions at large transverse momenta, extending a recent study for the {bar {Lambda}} antihyperon. We make predictions by using different parameterizations of the polarized parton densities and models for the polarized fragmentation functions. Similar to the {bar {Lambda}} polarization, the {bar {Xi}}{sup 0} and {bar {Xi}}{sup +} polarizations are found to be sensitive to the polarized anti-strange sea, {Delta}{bar s}(x), in the nucleon. The {bar {Sigma}}{sup -} and {bar {Sigma}}{sup +} 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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  • Journal Name: Physical Review D; Journal Volume: 0; Journal Issue: 0; Related Information: Journal Publication Date: 2007

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  • Report No.: LBNL--63097
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 932693
  • Archival Resource Key: ark:/67531/metadc897693

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  • November 20, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 22, 2016, 7:10 p.m.

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Chen, Ye; Liang, Zuo-tang; Sichtermann, Ernst; Xu, Qing-hua & Zhou, Shan-shan. Anti-Hyperon polarization in high energy pp collisions withpolarized beams, article, November 20, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc897693/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.