Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Hadronenstruktur und -spektroskopie

HK 38.4: Vortrag

Donnerstag, 22. März 2012, 17:45–18:00, RW 1

In-Medium Properties of the η^′ Meson^⋆ — •Mariana Nanova — II. Physikalisches Institut, Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen

The attenuation of η^′-meson in cold nuclear matter has been studied in photonuclear reactions off LH₂, LD₂,¹²C, ⁴⁰Ca, ⁹³Nb and ²⁰⁸Pb nuclei. The experiment was performed at the ELSA accelerator in Bonn with the combined setup of the Crystal Barrel and TAPS detectors. The inelastic η^′N cross section and the in-medium width are deduced and compared to theoretical predictions. Effects of photon shadowing and secondary production processes are discussed. Momentum distributions of η^′-mesons are compared for the different targets. The feasibility of planned experiments searching for η^′-mesic states is analyzed.
^⋆Funded by DFG(SFB/TR-16)