Probing transverse quark polarization in deep-inelastic leptoproduction
Abstract
The azimuthal dependence of hadrons produced in lepton scattering off a polarized hadron probes the quark transverse-spin distributions. In the calculation of the asymmetries, transverse momenta of quarks in the distribution and fragmentation functions must be incorporated. In addition to the (φ + φS) asymmetry for transversely polarized hadrons, known as the Collins effect, we find 2φ asymmetries for both transversely and longitudinally polarized hadrons.
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