Speaker
Description
The XLZD collaboration—combining the XENON, LZ, and DARWIN efforts—is developing a dual-phase xenon time projection chamber with 60–80 tonnes of active mass, designed to reach WIMP-nucleon cross-section sensitivities down to the neutrino floor. Beyond dark matter, XLZD will also operate as a rare-event observatory. This talk presents XLZD's projected sensitivity to neutrinoless double beta decay in natural xenon. With a 10-year exposure in the 80t configuration, XLZD can achieve a 3σ discovery potential for a half-life of 5.7×10^27 years, and a 90% CL exclusion sensitivity of 1.3×10^28 years. Across commonly considered nuclear matrix elements, this reach will exclude the inverted neutrino mass ordering and begin to probe the normal ordering.
