4D Seminar: Ben Lehmann (UC Santa Cruz)

Seminar Organizer


Event Details


Title: Direct detection of dark matter far from the weak scale

The WIMP may not be dead, but its decline has opened a number of new frontiers in the search for dark matter. Numerous candidates now line a vast range of scales, and the weak scale is no longer such a clear guidepost. This is especially problematic for traditional direct detection searches: decades of development have produced detectors that are extremely sensitive to weak-scale dark matter, but nearly blind to other important targets. The growing scope of our search thus calls for new experimental ideas. On the one hand, far below the weak scale, I will discuss new concepts in electronic direct detection, including significant new developments in the physics of superconducting detectors. These theoretical advances pave the way for experiments to systematically probe dark matter down to the keV scale, where cosmological constraints become relevant. On the other hand, far above the weak scale, I will discuss the potential for existing technologies to probe dark matter at the Planck scale — and, in particular, the exotic possibility of detecting black holes in the laboratory. Taken together, these prospects promise to transform direct detection from a surgical instrument at the weak scale to a robust tool in the search for new physics across the scales.