SENSEI: First Direct-Detection Constraints on sub-GeV Dark Matter from a Surface Run
| Autor: | The SENSEI Collaboration, Crisler, Michael, Essig, Rouven, Estrada, Juan, Fernandez, Guillermo, Tiffenberg, Javier, Haro, Miguel Sofo, Volansky, Tomer, Yu, Tien-Tien |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 121, 061803 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.121.061803 |
| Popis: | The Sub-Electron-Noise Skipper CCD Experimental Instrument (SENSEI) uses the recently developed Skipper-CCD technology to search for electron recoils from the interaction of sub-GeV dark matter particles with electrons in silicon. We report first results from a prototype SENSEI detector, which collected 0.019 gram-days of commissioning data above ground at Fermi National Accelerator Laboratory. These commissioning data are sufficient to set new direct-detection constraints for dark matter particles with masses between ~500 keV and 4 MeV. Moreover, since these data were taken on the surface, they disfavor previously allowed strongly interacting dark matter particles with masses between ~500 keV and a few hundred MeV. We discuss the implications of these data for several dark matter candidates, including one model proposed to explain the anomalously large 21-cm signal observed by the EDGES Collaboration. SENSEI is the first experiment dedicated to the search for electron recoils from dark matter, and these results demonstrate the power of the Skipper-CCD technology for dark matter searches. Comment: 5 pages + references, 4 figures, 1 table. V2 has additional references and minor clarifications. Published in PRL |
| Databáze: | arXiv |
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