München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Hadron Structure and Spectroscopy VIII

HK 57.6: Vortrag

Freitag, 22. März 2019, 15:30–15:45, HS 13

K⁺ Σ⁻ Photoproduction at the BGO-OD Experiment — •Johannes Groß — Physikalisches Institut der Universität Bonn

The BGO-OD experiment at the ELSA accelerator facility uses an energy-tagged bremsstrahlung photon beam to investigate the excitation spectra of the nucleon. The setup consists of a highly segmented BGO calorimeter surrounding the target, with a particle tracking magnetic spectrometer at forward angles.

This unique combination is ideal for investigating low momentum transfer processes due to the acceptance and high momentum resolution at forward angles. In addition, the reconstruction capabilities of mixed charged final states is ideal for the investigation of strangeness photoproduction as part of an extensive experimental program. Preliminary results for K⁺ Σ⁻ photoproduction will be presented.

These first data were acquired using a novel analysis technique, where K⁺ are identified in the BGO calorimeter via their time-delayed weak decay. This is complemented by the high momentum resolution and extreme forward acceptance of K⁺ detection in the forward spectrometer.

Supported by DFG (PN 50165297)