  We derive helicity amplitudes for diffractive leptoproduction of the S and D
wave states of vector mesons. We predict a dramatically different spin
dependence for production of the S and D wave vector mesons. We find very small
$R=\sigma_{L}/\sigma_{T}$ and abnormally large higher twist effects in
production of longitudinally polarized D-wave vector mesons.

High Energy Physics - Phenomenology;High Energy Physics - Experiment;Nuclear Theory