학술논문
SENSEI: First Direct-Detection Results on sub-GeV Dark Matter from SENSEI at SNOLAB
Document Type
Working Paper
Author
SENSEI Collaboration; 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, Yonatan; 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, Timon; Xu, Hailin
Source
Subject
Language
Abstract
We present the first results from a dark matter search using six Skipper-CCDs in the SENSEI detector operating at SNOLAB. With an exposure of 534.9 gram-days from well-performing sensors, we select events containing 2 to 10 electron-hole pairs. After aggressively masking images to remove backgrounds, we observe 55 two-electron events, 4 three-electron events, and no events containing 4 to 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.
Comment: 5 pages, 2 figures, + Supplemental Materials (5 pages, 5 figures) + References
Comment: 5 pages, 2 figures, + Supplemental Materials (5 pages, 5 figures) + References