The well-established NSTAR workshop brings together expertise from both experiments and theory to discuss the current progress and future prospects on the physics of the Baryon spectrum and the structure of excited nucleons. Studying the nucleon excitation spectrum provides a toolset to investigate the strong interaction in the non-perturbative regime and allows us to understand how the various baryons emerge from quantum chromodynamics (QCD).
Effective field theories, QCD-inspired models, and Schwinger-Dyson approaches to QCD aim to identify the key degrees of freedom describing the nucleon, while lattice QCD provides first-principle calculations at a precision that can confront experiment. A plethora of high-quality experimental results utilising photo- and electro-production reactions, hadron-induced reactions, e+e- and ion collisions provide experimental constraints that allow us to study in detail several aspects of the baryon spectrum including reaction amplitudes, electrocouplings, and the excited nucleon structure.
The program will comprise a series of invited plenary talks and contributed parallel sessions.
Topics covered in the workshop are:
- Baryon spectrum through meson photoproduction
- Baryon resonances in experiments with hadron beams and in the e+e- collisions
- Baryon resonances in ion collisions and their role in cosmology
- Baryon structure through meson electroproduction, transition form factors, and time-like form factors
- Amplitude analyses and baryon parameter extraction
- Baryon spectrum and structure from first principles of QCD / Lattice QCD
- Effective field theories, phenomenological models, and functional methods
- Exotic Hadrons
- Facilities and future projects
- Other topics related to N* Physics