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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Hadronenstruktur und -spektroskopie V

HK 17.7: Talk

Tuesday, March 22, 2011, 15:45–16:00, C-2

ω Photoproduction off Protons and Neutrons with CBELSA-TAPS^⋆ — •Frida Dietz — II. Physikalisches Institut, Heinrich-Buff-Ring 16, 35392 Giessen, Germany

ω photoproduction off LH₂ and LD₂ targets has been studied with the tagged photon beam of the ELSA accelerator in Bonn. The ω meson was identified via the ω → π⁰ γ decay mode, using the combined setup of the Crystal Barrel/TAPS setup, which allowed photon detection over almost the full solid angle. The aim of this study is to determine the ω photoproduction cross section on the neutron, which has not been measured so far but is of particular importance with respect to model calculations of the ω-nucleus interaction. The quasi-free exclusive production channels of the ω off the proton and neutron were studied and compared. In addition, the inclusive cross section for omega produced off LD₂ has been determined using an event-by-event efficiency correction which is independent of any reaction kinematics. Preliminary results on both the total and differential cross sections will be presented.
^⋆ supported by the DFG (SFB/TR-16)