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Related Experiment Video

Updated: Oct 5, 2025

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
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First Direct Detection Constraints on Planck-Scale Mass Dark Matter with Multiple-Scatter Signatures Using the

P Adhikari1, R Ajaj1,2, M Alpízar-Venegas3

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|January 21, 2022
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Summary
This summary is machine-generated.

Supermassive dark matter searches using the DEAP-3600 detector found no signals. This provides the first direct detection constraints on Planck-scale mass dark matter and its scattering cross sections.

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Area of Science:

  • Particle Physics
  • Cosmology
  • Astrophysics

Background:

  • Well-motivated theories predict dark matter with Planck-scale mass (approximately 10^19 GeV/c^2).
  • Several cosmological mechanisms could produce such supermassive dark matter particles.

Purpose of the Study:

  • To search for multiscatter signals indicative of supermassive dark matter.
  • To establish the first direct detection constraints on Planck-scale mass dark matter.

Main Methods:

  • A blind analysis of data from the DEAP-3600 detector was conducted over 813 days of live time.
  • The DEAP-3600 is a 3.3-tonne single-phase liquid argon detector located at SNOLAB.

Main Results:

  • No candidate signals for supermassive dark matter were observed.
  • The study sets leading limits on dark matter masses from 8.3x10^6 to 1.2x10^19 GeV/c^2.
  • Constraints were placed on 40Ar-scattering cross sections between 1.0x10^-23 and 2.4x10^-18 cm^2.

Conclusions:

  • The results provide the first direct detection constraints for Planck-scale mass dark matter.
  • The findings are interpreted as constraints on composite dark matter models with specific nucleon-to-nuclear cross section scalings.