First Direct-Detection Results on Sub-GeV Dark Matter Using the SENSEI Detector at SNOLAB
Por:
Adari P., Bloch I.M., Botti A.M., Cababie M., Cancelo G., Cervantes-Vergara B.A., Crisler M., Daal M., Desai A., Drlica-Wagner A., Essig R., Estrada J., Etzion E., Moroni G.F., Holland S.E., Kehat J., Korn Y., Lawson I., Luoma S., Orly A., Perez S.E., Rodrigues D., Saffold N.A., Scorza S., Singal A., Sofo-Haro M., Stefanazzi L., Stifter K., Tiffenberg J., Uemura S., Villalpando E.M., Volansky T., Wu Y., Yu T.-T., Emken T., Xu H.
Publicada:
1 ene 2025
Resumen:
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. © 2025 American Physical Society.
Filiaciones:
Adari P.:
C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, 11794, NY, United States
Department of Physics and Astronomy, Stony Brook University, Stony Brook, 11794, NY, United States
Bloch I.M.:
Berkeley Center for Theoretical Physics, University of California, Berkeley, 94720, CA, United States
Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, 94720, CA, United States
Botti A.M.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Cababie M.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Department of Physics, FCEN, University of Buenos Aires, IFIBA, CONICET, Buenos Aires, Argentina
Cancelo G.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Cervantes-Vergara B.A.:
Universidad Nacional Autónoma de México, Ciudad de México, Mexico
Crisler M.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Daal M.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Desai A.:
Department of Physics, Institute for Fundamental Science, University of Oregon, Eugene, 97403, OR, United States
Drlica-Wagner A.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Kavli Institute for Cosmological Physics, University of Chicago, Chicago, 60637, IL, United States
Department of Astronomy and Astrophysics, University of Chicago, Chicago, 60637, IL, United States
Essig R.:
C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, 11794, NY, United States
Estrada J.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Etzion E.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Moroni G.F.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Holland S.E.:
Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, 94720, CA, United States
Kehat J.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Korn Y.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Lawson I.:
SNOLAB, Lively, P3Y 1N2, ON, Canada
Luoma S.:
SNOLAB, Lively, P3Y 1N2, ON, Canada
Orly A.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Perez S.E.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Buenos Aires, Argentina
CONICET, Universidad de Buenos Aires, Instituto de Física de Buenos Aires (IFIBA), Buenos Aires, Argentina
Rodrigues D.:
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Buenos Aires, Argentina
CONICET, Universidad de Buenos Aires, Instituto de Física de Buenos Aires (IFIBA), Buenos Aires, Argentina
Saffold N.A.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Scorza S.:
Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, Grenoble, 38000, France
Singal A.:
C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, 11794, NY, United States
Department of Physics and Astronomy, Stony Brook University, Stony Brook, 11794, NY, United States
Sofo-Haro M.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Universidad Nacional de Córdoba, CNEA, CONICET, Cordoba, Argentina
Stefanazzi L.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Stifter K.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Tiffenberg J.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Uemura S.:
Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, 60510, IL, United States
Villalpando E.M.:
Kavli Institute for Cosmological Physics, University of Chicago, Chicago, 60637, IL, United States
Volansky T.:
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, 69978, Israel
Wu Y.:
C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, 11794, NY, United States
Department of Physics and Astronomy, Stony Brook University, Stony Brook, 11794, NY, United States
Yu T.-T.:
Department of Physics, Institute for Fundamental Science, University of Oregon, Eugene, 97403, OR, United States
Emken T.:
Oskar Klein Centre, Department of Physics, Stockholm University, Stockholm, SE-10691, Sweden
Xu H.:
C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, 11794, NY, United States
Department of Physics and Astronomy, Stony Brook University, Stony Brook, 11794, NY, United States
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