The High Energy Theory Group focuses on understand the fundamental forces of nature and cosmology. The unification of the electromagnetic and weak nuclear force is well understood and is continually being tested experimentally. Among the objectives of the group in Minnesota is to push our understanding beyond the Standard Model of electroweak interactions. The strong nuclear force is inherently more complicated and understand the nature of strongly interacting systems is another major objective of the group.
Particle Astrophysics and Cosmology is another aspect of High Energy theory as the Universe provides a laboratory for studying particle interactions at energies much higher than can be achieved experimentally. Topics which are actively pursued include, inflation, the baryon asymmetry, dark matter, nucleosynthesis and large scale structure.