LZ experiment sets new record in search for dark matter

by Ewan Fraser (University of Liverpool)

Wednesday 25 Sept 2024, 14:30 → 16:00 Europe/London

OLL/3-337 - Seminar Room (Liverpool Physics)

LZ experiment sets new record in search for dark matter

LZ has announced its WIMP Search 2024 results at TeVPA and LIDINE conferences. This analysis includes 3.3 ± 0.1 tonne-years of new exposure and features a technique to actively tag background electronic recoils from ²¹⁴Pb β decays. Charge-suppressed two-neutrino double electron capture events from ¹²⁴Xe decays are identified as a noteworthy new background.  World-leading constraints are placed on WIMP-nucleon cross sections. The strongest spin-independent exclusion set is 2.2 × 10⁻⁴⁸ cm² at the 90% confidence level for a WIMP mass of 43 GeV/c².

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Seminar_ WIMP Search 2024.pdf