Wednesday Colloquium: Professor Yang Bai (University of Wisconsin - Madison)
Title: Dark Matter at Collider
Abstract: Although the fact that a large fraction of the matter in the universe is non-baryonic is beyond doubt, the exact composition of the dark matter is still shrouded in mystery. Using ultra-sensitive detectors in the deep underground laboratories, physicists are attempting to directly detect dark matter particles streaming from space. At colliders, physicists hope to manufacture large numbers of dark matterparticles and study their properties. I will first use an effective field theory approach to demonstrate the power of colliders by comparing these two approaches. I will then describe the recent efforts on searching for dark matter particles at colliders and how imminent discoveries may change our fundamental understanding of physics and the universe.