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HK: Fachverband Physik der Hadronen und Kerne
HK 65: Hadronenstruktur und -spektroskopie
HK 65.3: Talk
Thursday, March 7, 2013, 14:45–15:00, HSZ-304
Search for ω-mesic states∗ — •Stefan Friedrich — II. Physikalisches Institut, Gießen
Experiments searching for the existence of ω-mesic states, using the tagged photon beam at the ELSA accelerator in Bonn, are presented.
The combined setup of the Crystal Barrel and MiniTAPS detector systems,
which form a 4π electromagnetic calorimeter, was used for detecting
the possible ω-mesic states via the ω→π∘+γ decay mode.
The recoiling proton of the γ+p→ω+p reaction was identified
with an aerogel Cherenkov detector and the forward angle spectrometer MiniTAPS.
Two experiments on a carbon target have been performed as well as a reference measurement on LH2.
A comparison of the experimental results with theoretical predictions indicates a weakly attractive or even repulsive ω-nucleus potential.
∗Funded by DFG (SFB/TR16)