Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 84: Eingeladene Hauptvorträge

HK 84.2: Hauptvortrag

Freitag, 8. März 2013, 09:10–09:50, HSZ-02

The Subnuclear Structure of Matter - Baryon Spectroscopy at ELSA — •Ulrike Thoma — Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, D-53115 Bonn

One of the open challenges in subnuclear physics is to understand the non-perturbative regime of Quantum Chromodynamics, including the world of the nucleon and its excitations. The investigation of the formation and decay of baryon resonances made of the light quarks up, down and strange is the main theme of the CRC 16 ``Subnuclear Structure of Matter''. While the underlying gauge theory, Quantum Chromodynamics(QCD), is well established, the non-perturbative phenomenon of structure formation - the fundamental fields (the quarks and gluons) only appear within bound states (mesons and baryons) and their excitations - is not yet understood. Progress can only be made through a strong interplay of experiment and theory. A focus of this talk will be on the baryon spectroscopy results obtained at the electron accelerator ELSA, including in particular the recent double polarization experiments.