HARD DIFFRACTION IN VECTOR MESON PRODUCTION AT HERA On behalf of the H1 and ZEUS Collaborations
نویسنده
چکیده
Results on elastic vector meson production at HERA are presented in the framework of perturbative QCD. The energy dependence of the cross section for J/ψ photoproduction and for ρ electroproduction is studied. A full polarisation analysis, including the measurement of the 15 elements of the spin density matrix and of R = σL/σT , is presented for ρ electroproduction. Finally heavier vector mesons (ψ′ and Υ) production is discussed.
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تاریخ انتشار 1999