SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD

Title: SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD

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Abstract

We present the first direct-detection search for eV-to-GeV dark matter using a new ~2-gram high-resistivity Skipper-CCD from a dedicated fabrication batch that was optimized for dark-matter searches. Using 24 days of data acquired in the MINOS cavern at the Fermi National Accelerator Laboratory, we measure the lowest rates in silicon detectors of events containing one, two, three, or four electrons, and achieve world-leading sensitivity for a large range of sub-GeV dark matter masses. Data taken with different thicknesses of the detector shield suggest a correlation between the rate of high-energy tracks and the rate of single-electron events previously classified as "dark current." We detail key characteristics of the new Skipper-CCDs, which augur well for the planned construction of the ~100-gram SENSEI experiment at SNOLAB.

Authors:: Barak, Liron

Publication Date:: 2020-04-23

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Org.:: SENSEI

OSTI Identifier:: 1618059

Report Number(s):: arXiv:2004.11378; YITP-SB-2020-6; FERMILAB-PUB-20-158-AE-E
oai:inspirehep.net:1792814

DOE Contract Number:: AC02-07CH11359

Resource Type:: Journal Article

Journal Name:: TBD

Additional Journal Information:: Journal Name: TBD

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

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                    Barak, Liron, and et al. SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD.  United States: N. p., 2020. 
        Web.

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                    Barak, Liron, & et al. SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD.  United States.

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                    Barak, Liron, and et al. Thu .  
        "SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD".  United States.  https://www.osti.gov/servlets/purl/1618059.

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@article{osti_1618059,

  title        = {SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD},

  author       = {Barak, Liron and et al.},

  abstractNote = {We present the first direct-detection search for eV-to-GeV dark matter using a new ~2-gram high-resistivity Skipper-CCD from a dedicated fabrication batch that was optimized for dark-matter searches. Using 24 days of data acquired in the MINOS cavern at the Fermi National Accelerator Laboratory, we measure the lowest rates in silicon detectors of events containing one, two, three, or four electrons, and achieve world-leading sensitivity for a large range of sub-GeV dark matter masses. Data taken with different thicknesses of the detector shield suggest a correlation between the rate of high-energy tracks and the rate of single-electron events previously classified as "dark current." We detail key characteristics of the new Skipper-CCDs, which augur well for the planned construction of the ~100-gram SENSEI experiment at SNOLAB.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1618059},
  journal      = {TBD},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2020},

  month        = {4}

}

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