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Flavor asymmetry of polarized antiquark distributions and semi-inclusive DIS

  • B. Dressler
  • K. Goeke
  • M.V. Polyakov
  • C. Weiss
Theoretical physics

Abstract.

The \(1/N_c\)–expansion of QCD suggests large flavor asymmetries of the polarized antiquark distributions in the nucleon. This is confirmed by model calculations in the large–\(N_c\) limit (chiral quark–soliton model), which give sizable results for \(\Delta\bar u(x) - \Delta\bar d (x)\) and \(\Delta\bar u(x) + \Delta\bar d (x) - 2 \Delta \bar s (x)\). We compute the contributions of these flavor asymmetries to the spin asymmetries in hadron production in semi-inclusive deep–inelastic scattering. We show that the large flavor asymmetries predicted by the chiral quark–soliton model are consistent with the recent HERMES data for spin asymmetries in charged hadron production.

Keywords

Model Calculation Inelastic Scattering Hadron Production Spin Asymmetry Charged Hadron 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • B. Dressler
    • 1
  • K. Goeke
    • 1
  • M.V. Polyakov
    • 1
  • C. Weiss
    • 1
  1. 1.Institut für Theoretische Physik II, Ruhr–Universität Bochum, 44780 Bochum, Germany DE

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