Freiburg 2008 – scientific programme

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T: Fachverband Teilchenphysik

T 24: QCD I

T 24.5: Talk

Tuesday, March 4, 2008, 17:45–18:00, KGI-HS 1032

Production of Upsilon mesons at HERA — •Igor Rubinskiy — DESY, Notkestrasse 85, 22607 Hamburg — Universität Hamburg

The photoproduction reaction γp → µ⁺µ⁻ p has been studied in ep interaction using the ZEUS detector at HERA. The Upsilon vector meson has been observed in a data sample corresponding to the full HERA I and II statistics. The γp cross section for Upsilon production is presented as a function of W in the range 60 < W < 220 GeV and compared to theory and other measurements.