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The low-energy spectrum in DAMIC at SNOLAB

by Alvaro E. Chavarria

Submission summary

As Contributors: Alvaro Chavarria
Arxiv Link: (pdf)
Date submitted: 2022-10-04 19:00
Submitted by: Chavarria, Alvaro
Submitted to: SciPost Physics Proceedings
Proceedings issue: 14th International Conference on Identification of Dark Matter
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
Approach: Experimental


The DAMIC experiment employs large-area, thick charge-coupled devices (CCDs) to search for the interactions of low-mass dark matter particles in the galactic halo with silicon atoms in the CCD target. From 2017 to 2019, DAMIC collected data with a seven-CCD array (40-gram target) installed in the SNOLAB underground laboratory. We report dark-matter search results, including a conspicuous excess of events above the background model below 200 eV$_{\rm ee}$, whose origin remains unknown. We present details of the published spectral analysis, and update on the deployment of skipper CCDs to perform a more precise measurement by early 2023.

Current status:
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Submission & Refereeing History

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Submission 2210.00587v1 on 4 October 2022

Reports on this Submission

Anonymous Report 1 on 2022-11-7 (Invited Report)


Author presents the status of Dark Matter searches by DAMIC experiment with the details of published analysis. In the manuscript also described low energy excess of unknown origin and attempts to find an explanation to it which leads to an update of the setup with ultra-noise skipper CCDs. The measurement in updated configuration is foreseen by early 2023.
The text is well written and clear. I recommend the manuscript for publication as it is.

  • validity: high
  • significance: high
  • originality: -
  • clarity: high
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