Ponente
Descripción
LUX-ZEPLIN (LZ) is a dark matter experiment located at the Sanford Underground Research Facility in South Dakota, USA, employing a 7 tonne active volume of liquid xenon in a dual-phase time projection chamber. Its deep underground location and an extensive material assay program enable LZ to have achieved an observed background level of 6.3±0.5×10$^{−5}$ events/keVee/kg/day in the WIMP search region. With a combined exposure of 4.2 tonne-years from all science campaigns, LZ has placed the most stringent limits on spin-independent WIMP-nucleon cross section down to 2.2×10${}^{−48}$ cm$^2$ for a 40 GeV/c$^2$ WIMP mass. This talk will include innovations in background assessment and mitigation, highlighting the flow-based tagging of radon-chain decays in the LZ TPC, as applied in LZ's 2024 WIMP search.
