Recent results from LZ and future prospects for liquid xenon dark matter searches (Knut Morå, University of Zurich)
par
amphi Charpak
The most sensitive detectors to dark matter-matter interactions for weak-scale dark matter masses are two-phase time projection chambers containing ultra-pure targets of liquid xenon. In this talk I will discuss recent results from the LUX-ZEPLIN (LZ) experiment as well as discuss the prospects for the next-generation XLZD experiment. LZ achieved the worlds best sensitivity to spin-independent WIMP-nucleon interactions for a 40 GeV/c2 WIMP of 5.1^{-48} cm2. A follow-up search with the same data set, extending the search window up to 270 keV, yielded one event consistent with a nuclear recoil of 240 +/- 23 (stat) +/- 23(syst) keV, which is difficult to explain with any known background, and which corresponded to a 2.6 sigma global significance across the search space. XLZD is the planned ultimate liquid xenon dark matter search, which will use a 60-80 tonne target to probe dark matter cross-sections all the way to the “neutrino fog” where astrophysical neutrinos become the dominant background.