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DTSTART;TZID=America/Los_Angeles:20260227T120000
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SUMMARY:INPA Seminar Speaker: Chami Amarasinghe (UCSB)- Title: Hidden track structures in liquid xenon and their implications for dark matter searches
DESCRIPTION:Date: February 27\, 2026 \nTime: 12:00 pm – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: Chami Amarasinghe (UCSB)  \nTitle: Hidden track structures in liquid xenon and their implications for dark matter searches \nAbstract: Dual-phase liquid xenon detectors are entering a regime where new insights into signal formation are required to make robust discoveries of WIMPs and solar neutrino CEvNS. I will present two results from the LUX-ZEPLIN (LZ) experiment showing that key signals and backgrounds are not described by standard models of light and charge production in liquid xenon. First\, double-electron-capture backgrounds in WIMP searches produce unexpectedly strong electron-ion recombination\, generating events that mimic nuclear recoils. Second\, neutron calibrations reveal excess fluctuations in nuclear recoil signals\, boosting the observable rates of low-mass dark matter and solar neutrino CEvNS. I will describe how the underlying physics of track structures impacts current dark matter searches and the predictions of future experiments. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-chami-amarasinghe-ucsb-title-calibrating-lz-detector/
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