Search for light dark matter with NEWS-G

Abstract

The NEWS-G collaboration is searching for light dark matter candidates using a spherical proportional counter. Light gases, such as hydrogen, helium, and neon, are used as targets, providing access in the 0.1-10 GeV mass range. First results obtained with SEDINE, a 60 cm in diameter detector, in the Underground Laboratory of Modane yielded a 90% confidence level upper limit of 4.4x 10^{37} cm^2 on the nucleon-dark matter interaction cross-section for a candidate with 0.5 GeV mass. Recent developments in several aspects of the detector instrumentation are presented, along with the construction of a new, 140 cm in diameter, detector with new compact shielding.

10 pages, 10 figures, 15th Topical Seminar on Innovative Particle and Radiation Detectors, 14-17 October 2019, Siena, Italy

References in corpus (8)

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• A multiball read-out for the spherical proportional counter