Currently there are four known fundamental interactions which form the base of the standard model of physics. Gravitation, electrodynamics, strong interaction and weak force. While the precise understanding of gravitational force and electrodynamics influences all areas of our everyday lives and are mostly taken for granted, the effects of strong interaction are much harder to grasp. Yet strong interaction played an important role in the early development of the universe, in forming the stars and in the synthesis of chemical elements in the universe. It holds nuclear matter together and its complexity is responsible for the structural properties of protons and related particles. Almost all visible mass in the universe is generated dynamically by the effects of strong interaction. The achievement of a precise quantitative understanding of strong interaction on all length scales and its role in the standard model of physics, is the shared challenge of the cooperating partner institutions in the Helmholtz-Institute Mainz: the GSI Helmholtz Center for Heavy Ion Research in Darmstadt and the Institute of Nuclear Chemistry, Nuclear Physics and Physics of the Johannes Gutenberg University Mainz.
EMP Hadronstructure with Electromagnetic Processes