Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2025 Jan 10;134(1):011804.
doi: 10.1103/PhysRevLett.134.011804.

First Direct-Detection Results on Sub-GeV Dark Matter Using the SENSEI Detector at SNOLAB

Prakruth Adari  1   2 , Itay M Bloch  3   4 , Ana M Botti  5 , Mariano Cababie  5   6 , Gustavo Cancelo  5 , Brenda A Cervantes-Vergara  7 , Michael Crisler  5 , Miguel Daal  8 , Ansh Desai  9 , Alex Drlica-Wagner  5   10   11 , Rouven Essig  1 , Juan Estrada  5 , Erez Etzion  8 , Guillermo Fernandez Moroni  5 , Stephen E Holland  12 , Jonathan Kehat  8 , Yaron Korn  8 , Ian Lawson  13 , Steffon Luoma  13 , Aviv Orly  8 , Santiago E Perez  5   14   15 , Dario Rodrigues  14   15 , Nathan A Saffold  5 , Silvia Scorza  16 , Aman Singal  1   2 , Miguel Sofo-Haro  5   17 , Leandro Stefanazzi  5 , Kelly Stifter  5 , Javier Tiffenberg  5 , Sho Uemura  5 , Edgar Marrufo Villalpando  10 , Tomer Volansky  8 , Yikai Wu  1   2 , Tien-Tien Yu  9 , Timón Emken  18 , Hailin Xu  1   2 ; SENSEI Collaboration
Affiliations
Free article

First Direct-Detection Results on Sub-GeV Dark Matter Using the SENSEI Detector at SNOLAB

Prakruth Adari et al. Phys Rev Lett. .
Free article

Abstract

We present the first results from a dark matter search using six Skipper-CCDs in the SENSEI detector operating at SNOLAB. We employ a bias-mitigation technique of hiding approximately 46% of our total data and aggressively mask images to remove backgrounds. Given a total exposure after masking of 100.72 gram-days from well-performing sensors, we observe 55 two-electron events, 4 three-electron events, and no events containing 4-10 electrons. The two-electron events are consistent with pileup from one-electron events. Among the 4 three-electron events, 2 appear in pixels that are likely impacted by detector defects, although not strongly enough to trigger our "hot-pixel" mask. We use these data to set world-leading constraints on sub-GeV dark matter interacting with electrons and nuclei.

PubMed Disclaimer