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

Abstract

We evaluate the single target-spin sin(phi_h) and sin(2\phi_h) azimuthal asymmetries in the semi-inclusive deep inelastic lepton scattering off longitudinally polarized proton target under HERMES kinematic conditions. A good agreement with the HERMES data can be achieved using only the twist-2 distribution and fragmentation functions.

Comments: 6 pages with figures, LaTex, uses espcrc1.sty and epsfig.sty. Contribution to the Proceedings of the Workshop on "The Structure of the Nucleon" (N99), Frascati, June 7-9, 1999; to appear in the Nucl. Phys. A (Proc. Suppl.)