Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-05-27
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures. Contribution to the proceedings of the "Rencontres de Moriond": 1999 QCD and High Energy Hadronic Interact
Scientific paper
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/Psi photoproduction and for rho electroproduction is studied. A full polarisation analysis, including the measurement of the 15 elements of the spin density matrix and of R=sigma_L/sigma_T, is presented for rho electroproduction. Finally heavier vector mesons (Psi' and Upsilon) production is discussed.
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