Hadron structure at low Q^2

Understand

This review deals with the structure of hadrons, strongly interacting many-body systems consisting of quarks and gluons.

• These systems have a size of about 1 fm, which shows up in scattering experiments at low momentum transfers $Q$ in the GeV region.
• At this scale the running coupling constant of Quantum Chromodynamics (QCD), the established theory of the strong interactions, becomes divergent.
• It is therefore highly intriguing to explore this theory in the realm of its strong interaction regime.