SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Invited Talks - IV

HK 21.2: Hauptvortrag

Donnerstag, 2. September 2021, 11:30–12:00, H1

Baryon Spectroscopy with the CBELSA/TAPS experiment at ELSA — •Annika Thiel — Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn

The dynamics of the quarks and gluons inside the nucleon are a long-standing question in hadron physics. To shed more light on this topic, the excitation spectrum of the nucleons needs to be measured and compared to theoretical models like constituent quark models or lattice QCD calculations.

The extraction of the resonance spectrum is a recent research project by several different experiments. One of them is the CBELSA/TAPS experiment, which is located at the ELSA accelerator in Bonn. The CBELSA/TAPS experiment features a detector system with nearly full 4π angular coverage and a high detection efficiency for photons, which makes it the ideal tool for the measurement of final states comprising neutral mesons. One of its special features is the use of linearly or circularly polarized photon beams impinging on a longitudinally or transversely polarized butanol target. This allows for the measurement of single or double polarization observables, which are of major importance in the identification of small resonance contributions.

In this presentation, an overview of the recent status in baryon spectroscopy at the CBELSA/TAPS experiment will be given. This includes measurements of different polarization observables, as well as a review of their impact on the excitation spectra of the nucleons. Supported by the DFG (SFB/TR16).