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Search for Light Dark Matter with NEWS-G at the Laboratoire Souterrain de Modane Using a Methane Target

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arxiv 2407.12769 v2 pith:WA7H74A2 submitted 2024-07-17 hep-ex astro-ph.CO

Search for Light Dark Matter with NEWS-G at the Laboratoire Souterrain de Modane Using a Methane Target

M. M. Arora , L. Balogh , C. Beaufort , A. Brossard , M. Chapellier , J. Clarke , E. C. Corcoran , J.-M. Coquillat
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A. Dastgheibi-Fard Y. Deng D. Durnford C. Garrah G. Gerbier I. Giomataris G. Giroux P. Gorel M. Gros P. Gros O. Guillaudin E. W. Hoppe I. Katsioulas F. Kelly P. Knights P. Lautridou A. Makowski I. Manthos R. D. Martin J. Matthews H. M. McCallum H. Meadows L. Millins J.-F. Muraz T. Neep K. Nikolopoulos N. Panchal M.-C. Piro N. Rowe D. Santos G. Savvidis I. Savvidis D. Spathara F. Vazquez de Sola Fernandez R. Ward
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classification hep-ex astro-ph.CO
keywords mathrmdarkmatterlaboratoirelightmassmethanemodane
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abstract

The NEWS-G direct detection experiment uses spherical proportional counters to search for light dark matter candidates. New results from a 10 day physics run with a $135\,\mathrm{cm}$ in diameter spherical proportional counter at the Laboratoire Souterrain de Modane are reported. The target consists of $114\,\mathrm{g}$ of methane, providing sensitivity to dark matter spin-dependent coupling to protons. New constraints are presented in the mass range $0.17$ to $1.2\,\mathrm{GeV/c^2}$, with a 90% confidence level cross-section upper limit of $30.9\,\mathrm{pb}$ for a mass of $0.76\,\mathrm{GeV/c^2}$.

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