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The apparent discrepancy between spectroscopic factors obtained in (e,e ′ p) and (d, 3 He) experiments is investigated. This is performed first for 48 Ca(e,e ′ p) and 48 Ca(d, 3 He) experiments and then for other nuclei. It is shown that the discrepancy disappears if the (d, 3 He) experiments are re-analyzed with a non-local finite range DWBA analysis with a bound-state wave function that is obtained from (e,e ′ p) experiments.Key words: NUCLEAR REACTIONS 48 Ca(e,e ′ p), E = 440 MeV; measured ρ(E m , p m ); deduced spectroscopic factors; comparison of spectroscopic factors from (e,e ′ p) and (d, 3 He).

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Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-inelastic scattering of positrons and electrons off a transversely nuclear-polarized hydrogen target. The dependence of the cross section on the azimuthal angles of the target polarization ([phi]S) and the produced hadron ([phi]) is found to have a substantial sin([phi]+[phi]S) modulation for the production of [pi]+, [pi]- and K+. This Fourier component can be interpreted in terms of non-zero transversity distribution functions and non-zero favored and disfavored Collins fragmentation functions with opposite sign. For [pi]0 and K- production the amplitude of this Fourier component is consistent with zero