Particle Physics and Astrophysics

GRAPHIC: colorful simulation of galaxy

Scientists in the Particle Physics and Astrophysics Directorate search for answers to fundamental questions about the building blocks of matter and the nature of space and time. They carry out experiments on the Earth's surface, underground and in space. They help design and build the instruments used in these quests, including underground detectors, precision silicon tracking systems for colliders, a space telescope and the world’s biggest digital camera. Theorists, experimenters and experts in computer simulation, mechanical engineering and other technical fields all join forces to push these studies ahead.

The research takes place on three frontiers, each with a unique approach to making discoveries and advancing our understanding of fundamental particles and the forces that govern their interactions.

Visit the SLAC Particle Physics and Astrophysics site »