Science and Technology Production

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

Article

Authorship:

Adari, Prakruth ; Bloch, Itay M. ; Botti, Ana M. ; Cababie, Mariano ; Cancelo, Gustavo ; Cervantes-Vergara, Brenda A. ; Crisler, Michael ; Daal, Miguel ; Desai, Ansh ; Drlica-Wagner, Alex ; Essig, Rouven ; Estrada, Juan ; Etzion, Erez ; Moroni, Guillermo Fernandez ; Holland, Stephen E. ; Kehat, Jonathan ; Korn, Yaron ; Lawson, Ian ; Luoma, Steffon ; Orly, Aviv ; Perez, Santiago E. ; Rodrigues, Dario ; Saffold, Nathan A. ; Scorza, Silvia ; Singal, Aman ; Sofo-Haro, Miguel ; Stefanazzi, Leandro ; Stifter, Kelly ; Tiffenberg, Javier ; Uemura, Sho ; Villalpando, Edgar Marrufo ; Volansky, Tomer ; Wu, Yikai ; Yu, Tien-Tien ; Emken, Timón ; Xu, Hailin

Date:

2025

Publishing House and Editing Place:

AMER PHYSICAL SOC

Magazine:

PHYSICAL REVIEW LETTERS, vol. 134 AMER PHYSICAL SOC

Summary *

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 Information provided by the agent in SIGEVA

Key Words

SKIPPER CCDDARK MATTERSNOLAB