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DTSTAMP:20260911T063039
DTSTART;TZID=America/Detroit:20260916T150000
DTEND;TZID=America/Detroit:20260916T160000
SUMMARY:Workshop / Seminar:Department Colloquium (Special HEP-Astro Seminar) | Search for Dark Matter Interactions at High Recoil Energy with the LUX-ZEPLIN Experiment
DESCRIPTION:The LUX-ZEPLIN (LZ) experiment is a dual-phase xenon time projection chamber designed to search for dark matter interactions with unprecedented sensitivity. While conventional WIMP searches focus primarily on low-energy nuclear recoils\, a broader class of dark matter models can produce significant signals at much higher recoil energies. In a new search using 2.84 tonne-years of LZ exposure\, we extend the nuclear-recoil energy window to approximately 270 keV to probe momentum- and velocity-dependent interactions described by non-relativistic effective field theory\, as well as inelastic dark matter models. The search observes one event in a region of low expected background\, consistent with a 248 +/- 23 (stat) +/- 23 (sys) keVnr nuclear recoil. I will describe the motivation\, methodology\, and results of this extended-energy search\, including the investigation of the high-energy event and possible background interpretations. I will also highlight work carried out at the University of Michigan that helped enable the extension to high recoil energies\, particularly the calibration and detector-response modeling of electronic and nuclear recoils\, together with studies of backgrounds relevant to the expanded search region.
UID:151995-21912589@events.umich.edu
URL:https://events.umich.edu/event/151995
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Physics,Science
LOCATION:West Hall - 340
CONTACT:
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