Particle physics studies the elementary constituents of matter and the fundamental forces acting between them. The present knowledge in this field is summarized int the  standard model of particle physics. It describes the properties of leptons and quarks and the electromagnetic, weak and strong forces between them. A central element of the standard model is the Higgs sector, which generates the masses of the elementary particles. The standard model has been thoroughly checked experimentally. It is a fundamental cornerstone of scientific knowledge.  

However, essential theoretical and experimental questions remain: Are there still unknown particles and new symmetries at very high energies? Does space have more than three dimensions? What is the nature of dark matter? What is the reason for the asymmetry of matter and antimatter in the universe?

Particle physics also provides the basis for our understanding of the formation and evolution of the universe. The research field of astroparticle physics has established itself in this area. Large observatories for the detection of cosmic protons, photons and neutrinos allow an extended view into the universe, and detectors in underground laboratories trace rare reactions such as nuclear collisions with dark matter particles. The simultaneous measurement of gravitational waves, particles and light from cosmic events allows for completely new astronomical observations.

The close interaction of astroparticle physics, cosmology and particle physics, as well as the worldwide research and development of cutting-edge technology for powerful particle accelerators and detectors, large observatories and satellite-based detectors bring the ambitious scientific goals within reach.

A highlight of the division's activities are the annual spring conferences with over 1000 participants. On the one hand, these conferences provide a broad overview of current developments in the field and, on the other hand, offer our young scientists ideal opportunities to present their own scientific results, discuss them with other scientists and build their own networks.