2017/06/30 by G Collaboration, D. M. Asner, Q. Arnaud +41
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Light dark matter #Massive particle #Nuclear physics #Nucleon #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #Scattering #WIMP #Weakly interacting massive particles #astro-ph.CO #astro-ph.IM #physics.ins-det
paper · pdf · doi:10.1016/j.astropartphys.2017.10.009
18 pages, 10 figures, acknowledgments section updated
openalex created_date 2017/06/23 · arxiv created 2017/09/07 · openalex publication_date 2017/10/24 · arxiv updated 2017/12/19 · openalex updated_date 2026/08/05
New Experiments With Spheres-Gas (NEWS-G) is a direct dark matter detection experiment using Spherical Proportional Counters (SPCs) with light noble gases to search for low-mass Weakly Interacting Massive Particles (WIMPs). We report the results from the first physics run taken at the Laboratoire Souterrain de Modane (LSM) with SEDINE, a 60 cm diameter prototype SPC operated with a mixture of Ne+CH4 (0.7 %) at 3.1 bars for a total exposure of 9.7 kg⋅ days. New constraints are set on the spin-independent WIMP-nucleon scattering cross-section in the sub-GeV/c2 mass region. We exclude cross-sections above 4.4 × \mathrm10-37 cm2 at 90 % confidence level (C.L.) for a 0.5 GeV/c2 WIMP. The competitive results obtained with SEDINE are promising for the next phase of the NEWS-G experiment: a 140 cm diameter SPC to be installed at SNOLAB by summer 2018.