\title{New Sub-GeV Dark Matter Results from SENSEI}
 
\author{Sho Uemura\\Tel Aviv University\\for the SENSEI Collaboration}
 
\date{November 5, 2020}
 
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    SENSEI (Sub-Electron Noise Skipper Experimental Instrument) is pioneering the development of silicon CCDs with sub-electron charge resolution for low-threshold direct detection of dark matter.
    These ``skipper CCDs'' are the first detectors capable of resolving single electrons in each of millions of pixels, and the low thresholds possible with this technology give SENSEI world-leading sensitivity to sub-GeV dark matter.

    This spring, SENSEI conducted the first direct-detection search using a skipper CCD from a dedicated fabrication batch optimized for dark matter searches.
    Using 24 days of data collected $\sim$100 m underground at Fermilab with a 2-gram CCD, we measure the lowest rates in silicon detectors of events containing one, two, three, or four electrons, and achieve world-leading sensitivity for a large range of sub-GeV dark matter masses.

    I will present these recent results, and preparations for the upcoming full-scale SENSEI run at the SNOLAB deep-underground facility.


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