Kelsey Oliver-Mallory (Imperial College London)

Searches for light dark matter and strong evidence of solar 8B CEνNS in LZ

Abstract: LUX-ZEPLIN (LZ) is a dark matter experiment centred on a 7-tonne dual-phase xenon detector, operating nearly a mile underground at the Sanford Underground Research Facility, in South Dakota, USA. The LZ Collaboration has recently completed the analysis of a 5.7 tonne-years exposure to search for light dark matter with masses of 3-9 GeV/c2 in the presence of coherent elastic neutrino-nucleus scattering (CEvNS) from 8B solar neutrinos. This presentation will describe the analytical methods used to establish world-leading constraints on dark matter-nucleus interactions and to provide the most significant evidence of solar 8B CEνNS to date. These results demonstrate the ability of tonne-scale dual-phase xenon detectors to measure rare signals at keV-scale energies.