Three-year annual modulation search with COSINE-100
نویسندگان
چکیده
COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of discovery by searching for matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the from dataset 2.82 yr livetime utilizing an active mass 61.3 kg, total exposure 173 kg$\cdot$yr. This result features improved event selection allows both lowering energy threshold 1 keV and more precise time-dependent background model. In 1-6 2-6 intervals, we observe best-fit values amplitude 0.0067$\pm$0.0042 0.0051$\pm$0.0047 counts/(day$\cdot$kg$\cdot$keV), respectively, phase fixed at 152.5 days.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.106.052005