TY - JOUR
T1 - First Direct-Detection Results on Sub-GeV Dark Matter Using the SENSEI Detector at SNOLAB
AU - (SENSEI Collaboration)
AU - Adari, Prakruth
AU - Bloch, Itay M.
AU - Botti, Ana M.
AU - Cababie, Mariano
AU - Cancelo, Gustavo
AU - Cervantes-Vergara, Brenda A.
AU - Crisler, Michael
AU - Daal, Miguel
AU - Desai, Ansh
AU - Drlica-Wagner, Alex
AU - Essig, Rouven
AU - Estrada, Juan
AU - Etzion, Erez
AU - Moroni, Guillermo Fernandez
AU - Holland, Stephen E.
AU - Kehat, Jonathan
AU - Korn, Yaron
AU - Lawson, Ian
AU - Luoma, Steffon
AU - Orly, Aviv
AU - Perez, Santiago E.
AU - Rodrigues, Dario
AU - Saffold, Nathan A.
AU - Scorza, Silvia
AU - Singal, Aman
AU - Sofo-Haro, Miguel
AU - Stefanazzi, Leandro
AU - Stifter, Kelly
AU - Tiffenberg, Javier
AU - Uemura, Sho
AU - Villalpando, Edgar Marrufo
AU - Volansky, Tomer
AU - Wu, Yikai
AU - Yu, Tien Tien
AU - Emken, Timón
AU - Xu, Hailin
N1 - Publisher Copyright:
© 2025 American Physical Society.
PY - 2025/1/10
Y1 - 2025/1/10
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85214647125
U2 - 10.1103/PhysRevLett.134.011804
DO - 10.1103/PhysRevLett.134.011804
M3 - Article
C2 - 39913736
AN - SCOPUS:85214647125
SN - 0031-9007
VL - 134
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
M1 - 011804
ER -