Abstract

Azimuthal single-spin asymmetries (SSA) in semi-inclusive electroproduction of mesons and chargedK-mesons in deep-inelastic scattering of positrons and electrons on a transversely polarised hydrogen target were observed. Significant SSA amplitudes for both the Collins and the Sivers mechanism are presented for the full data set recorded with transverse target polarisation at the HERMES experiment.

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