Electromagnetic transition form factors of nucleons.
- Datum: –11.30
- Plats: Zoom
- Föreläsare: An Di (Uppsala University)
- Kontaktperson: Rebeca Gonzalez Suarez
This will be a virtual seminar, and will be hosted in Zoom
Meeting ID: 693 6821 3842
Starting PhD seminar
The most challenging problem within the Standard Model is to understand how elementary particles build up composite hadrons. The electromagnetic nucleon transition form factors (TFFs) provide a way to understand the structure of the nucleon and its excitations. When a nucleon is probed electromagnetically, the process is dominated at high energies by the three-quark configuration thanks to asymptotic freedom. However, at low energies, the TFFs of nucleons are not well understood by the approaches based on quark-gluon degrees of freedom (lattice QCD, Dyson-Schwinger equations, QCD sum rules). At low energies, i.e. large distances, the process is dominated by pion-baryon fluctuations since pions are the lightest hadrons. In total, the nucleon state and its excitations have overlap with three-quark field configurations and with pion-baryon field configurations. My project contributes to the understanding of this multilayer picture of the nucleon.