Dark Matter Detection: WIMPs and Experimental Techniques

This lecture focuses on the detection of dark matter, specifically weakly interacting massive particles (WIMPs). It begins with a review of previous discussions on dark matter's existence in the early universe and the theoretical models surrounding it. The instructor explains the significance of WIMPs and their properties, including their mass and interaction cross-section. The lecture then transitions to methods of detecting dark matter in laboratory settings, emphasizing the importance of creating low-background environments to minimize interference from cosmic rays and other particles. Various detection techniques are discussed, including the use of noble gases like xenon in time projection chambers. The instructor highlights the challenges faced in direct detection experiments, particularly the need to distinguish dark matter signals from background noise. The lecture concludes with a discussion on the implications of current experimental results and the ongoing search for dark matter, underscoring the complexity and significance of this field in astrophysics.