Single target-spin asymmetries in semi-inclusive pion electroproduction on longitudinally polarized protons Original Research Article

We evaluate the single-spin sinΦh and sin2Φh azimuthal asymmetries in the semi-inclusive pion production in deep inelastic lepton scattering off longitudinally polarized proton target in the HERMES kinematics. A good agreement with the HERMES data is a achieved using only the twist-2 distribution and fragmentation functions.