Leipzig 2002 – scientific programme

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T: Teilchenphysik

T 503: Diffraktion

T 503.5: Talk

Thursday, March 21, 2002, 17:15–17:30, HS 10

Diffractive ρ⁰ production at HERMES — •Katerina Lipka — DESY Zeuthen, Platanenallee 6, 15738 Zeuthen

Spin-dependent vector meson production has been studied at the HERMES experiment at HERA. Recent results on the cross-section and the spin density matrix elements of diffractive exclusive ρ⁰ production will be presented in comparison to world data and theoretical predictions. The double-spin asymmetry of diffractive exclusive and quasi-real photo-production of ρ⁰-mesons will be shown in comparison to theoretical expectations, based on the Generalized Vector Meson Dominance (GVMD) description of both ρ⁰ production and inclusive DIS.