Manchester Particle Physics Seminars, Colloquia and Meetings

Jim Dobson: Dark matter search results from the complete LUX exposure and the future with the multi-tonne LUX-ZEPLIN

Friday, 24 February 2017 from to (Europe/London)
at Schuster
Description
Located 1 mile underground in the Davis Cavern at the Sanford Underground Research Facility in Lead, South Dakota, the Large Underground Xenon experiment used a 250 kg liquid xenon time projection chamber to search for the low energy recoils of xenon nuclei as they collide with our local galactic dark matter. In this talk I present results from the full 427-days of dark matter search data collected by LUX and discuss the pioneering low-energy calibrations that support them. Although LUX found no evidence for dark matter it placed the world's strongest constraint on the interaction of Weakly Interacting Massive Particles (WIMPs), excluding at 90% confidence WIMP-nucleon couplings greater than 1.1e-46 cm^2 for WIMPs of mass 50 GeV/c^2. Looking to the future, construction of LUX's successor, the LUX-ZEPLIN (LZ) experiment, is well underway. LZ builds upon the demonstrated response to ~few keV nuclear recoils and the excellent self-shielding properties of liquid xenon and scales the TPC design beyond all existing and underway experiments. I will give an overview of LZ and the challenges associated with this scale up, discuss the physics reach for both WIMPs and other non-WIMP signals, and present the current status of the experiment.