SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Hadron Structure and Spectroscopy III

HK 29.1: Gruppenbericht

Mittwoch, 22. März 2023, 14:00–14:30, SCH/A316

Probing the hadron spectrum with the GlueX experiment at Jefferson Lab — •Annika Thiel — Helmholtz-Institut für Strahlen- und Kernphysik, Nussallee 14-16, 53115 Bonn

One of the primary goals of non-pertubative QCD is the understanding of the hadron spectrum. A particular interesting aspect is the question, if and where states containing gluonic excitations contribute to the spectra. This issue has been tackled by different experiments using various production mechanisms without conclusive answers. A complementary production mechanism is the use of photoproduction, which is utilized by the GlueX experiment at Jefferson Lab.

The GlueX experiment started data taking in 2017 and is focused on the measurement of neutral as well as charged final states at photon energies up to 12 GeV. An important tool is the use of linearly polarized photons, which allows to shed light on the question whether natural or unnatural exchange dominates in the production of different states. Various results have been extracted in recent years, ranging from the extraction of polarization observables for different final states over the investigation of excited Λ states to the determination of the J/Ψ cross section at threshold.

This presentation will show the current status of the GlueX experiment and give an overview about the published results as well as ongoing analyses.