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.
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Received: 30 November 1999 / Published online: 17 March 2000
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Dressler, B., Goeke, K., Polyakov, M. et al. Flavor asymmetry of polarized antiquark distributions and semi-inclusive DIS. Eur. Phys. J. C 14, 147–157 (2000). https://doi.org/10.1007/s100520000329
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DOI: https://doi.org/10.1007/s100520000329