SENSEI at SNOLAB: Single-Electron Event Rate and Implications for Dark Matter
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arXiv
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| Natura: | Preprint |
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2024
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| author | Bloch, Itay M. Botti, Ana M. Cababie, Mariano Cancelo, Gustavo Cervantes-Vergara, Brenda A. Daal, Miguel Desai, Ansh Drlica-Wagner, Alex Essig, Rouven Estrada, Juan Etzion, Erez Moroni, Guillermo Fernandez Holland, Stephen E. Kehat, Jonathan Lawson, Ian Luoma, Steffon Orly, Aviv Perez, Santiago E. Rodrigues, Dario Saffold, Nathan A. Scorza, Silvia Sofo-Haro, Miguel Stifter, Kelly Tiffenberg, Javier Uemura, Sho Villalpando, Edgar Marrufo Volansky, Tomer Winkel, Federico Wu, Yikai Yu, Tien-Tien |
| author_facet | Bloch, Itay M. Botti, Ana M. Cababie, Mariano Cancelo, Gustavo Cervantes-Vergara, Brenda A. Daal, Miguel Desai, Ansh Drlica-Wagner, Alex Essig, Rouven Estrada, Juan Etzion, Erez Moroni, Guillermo Fernandez Holland, Stephen E. Kehat, Jonathan Lawson, Ian Luoma, Steffon Orly, Aviv Perez, Santiago E. Rodrigues, Dario Saffold, Nathan A. Scorza, Silvia Sofo-Haro, Miguel Stifter, Kelly Tiffenberg, Javier Uemura, Sho Villalpando, Edgar Marrufo Volansky, Tomer Winkel, Federico Wu, Yikai Yu, Tien-Tien |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18716 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | SENSEI at SNOLAB: Single-Electron Event Rate and Implications for Dark Matter Bloch, Itay M. Botti, Ana M. Cababie, Mariano Cancelo, Gustavo Cervantes-Vergara, Brenda A. Daal, Miguel Desai, Ansh Drlica-Wagner, Alex Essig, Rouven Estrada, Juan Etzion, Erez Moroni, Guillermo Fernandez Holland, Stephen E. Kehat, Jonathan Lawson, Ian Luoma, Steffon Orly, Aviv Perez, Santiago E. Rodrigues, Dario Saffold, Nathan A. Scorza, Silvia Sofo-Haro, Miguel Stifter, Kelly Tiffenberg, Javier Uemura, Sho Villalpando, Edgar Marrufo Volansky, Tomer Winkel, Federico Wu, Yikai Yu, Tien-Tien Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment 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. |
| title | SENSEI at SNOLAB: Single-Electron Event Rate and Implications for Dark Matter |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.18716 |