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New Experiment NEWSdm for Direct Searches for Heavy Dark Matter Particles

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Abstract

NEWSdm [Nuclear Emulsions for WIMP (weakly interacting massive particles) Search—directional measurement] is a new international experiment in which a photoemulsion target is used for a direct detection of dark-matter particles. In this experiment, the detection method is based on fixing the directions of trajectories of recoil nuclei originating from the elastic interaction of target nuclei with dark-matter particles from the galactic halo. This distinguishes NEWSdm from standard low-background experiments aimed at searches for dark-matter particles and based on an analysis of annual modulations of the number of detected events. The detector, which is simultaneously a target, is a block of nuclear emulsions that have a uniquely high spatial resolution owing to the reduction of the size of AgBr grains to about \(10\) nm. A resolution on this order of magnitude permits directional searches for dark-matter particles in cosmic space even at energies of recoil nuclei not higher than 30 keV.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    S. A. Gorbunov & N. S. Konovalova

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  1. S. A. Gorbunov
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  2. N. S. Konovalova
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Correspondence to S. A. Gorbunov or N. S. Konovalova.

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(On behalf of the NEWSdm Collaboration)

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Gorbunov, S.A., Konovalova, N.S. New Experiment NEWSdm for Direct Searches for Heavy Dark Matter Particles. Phys. Atom. Nuclei 83, 83–91 (2020). https://doi.org/10.1134/S1063778820010056

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  • DOI: https://doi.org/10.1134/S1063778820010056

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