Anti-Hyperon polarization in high energy pp collisions with polarized beams
Jul, 2007
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Abstract: (arXiv)
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.- 13.88.+e
- 13.85.Ni
- 13.87.Fh
- p p: inclusive reaction
- p: polarized beam
- transverse momentum: high
- polarization: longitudinal
- antihyperon: hadroproduction
- antihyperon: polarization
- parton: momentum spectrum
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