{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/sensei-at-snolab-single-electron-event-rate","title":"SENSEI at SNOLAB: Single-Electron Event Rate and Implications for Dark Matter","arxiv_id":"2410.18716","date":"2024-10-24","proceeding":null,"authors":["Itay M. Bloch","Ana M. Botti","Mariano Cababie","Gustavo Cancelo","Brenda A. Cervantes-Vergara","Miguel Daal","Ansh Desai","Alex Drlica-Wagner","Rouven Essig","Juan Estrada","Erez Etzion","Guillermo Fernandez Moroni","Stephen E. Holland","Jonathan Kehat","Ian Lawson","Steffon Luoma","Aviv Orly","Santiago E. Perez","Dario Rodrigues","Nathan A. Saffold","Silvia Scorza","Miguel Sofo-Haro","Kelly Stifter","Javier Tiffenberg","Sho Uemura","Edgar Marrufo Villalpando","Tomer Volansky","Federico Winkel","Yikai Wu","Tien-Tien Yu"],"abstract":"We present results from data acquired by the SENSEI experiment at SNOLAB after a major upgrade in May 2023, which includes deploying 16 new sensors and replacing the copper trays that house the CCDs with a new light-tight design. We observe a single-electron event rate of $(1.39 \\pm 0.11) \\times 10^{-5}$ e$^-$/pix/day, corresponding to $(39.8 \\pm 3.1)$ e$^-$/gram/day. This is an order-of-magnitude improvement compared to the previous lowest single-electron rate in a silicon detector and the lowest for any photon detector in the near-infrared-ultraviolet range. We use these data to obtain a 90% confidence level upper bound of $1.53 \\times 10^{-5}$ e$^-$/pix/day and to set constraints on sub-GeV dark matter candidates that produce single-electron events. We hypothesize that the data taken at SNOLAB in the previous run, with an older tray design for the sensors, contained a larger rate of single-electron events due to light leaks. We test this hypothesis using data from the SENSEI detector located in the MINOS cavern at Fermilab.","url_abs":"https://arxiv.org/abs/2410.18716v1","url_pdf":"https://arxiv.org/pdf/2410.18716v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"sensei-at-snolab-single-electron-event-rate","repo_url":"https://github.com/sensei-skipper/DataReleases","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}