Elastic electroproduction of ϱ and Jψ mesons at large Q2 at HERA

The total cross sections for the elastic electroproduction of P and Jψ mesons for Q2 > 8 GeV2 and 〈W〉 ⋍ 90 GeV/c2 are measured at HERA with the H1 detector. The measurements are for an integrated electron-proton luminosity of ⋍3 pb−1. The dependences of the total virtual photon-proton (γ∗p) cross sections on Q2, W and the momentum transfer squared to the proton (t), and, for the ϱ, the dependence on the polar decay angle (cos θ∗ are presented. The Jψ : ∂ cross section ratio is determined. The results are discussed in the light of theoretical models and of the interplay of hard and soft physics processes.