Three-year annual modulation search with COSINE-100

COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA’s claim of dark matter discovery by searching for a dark-matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the annual modulation signal from a dataset with a 2.82 yr livetime utilizing an active mass of 61.3 kg for a total exposure of

173 kg \cdot yr

. This new result features an improved event selection that allows for both lowering the energy threshold to 1 keV and a more precise time-dependent background model. In the 1–6 and 2–6 keV energy intervals, we observe best-fit values for the modulation amplitude of

0.0067 \pm 0.0042

and

0.0051 \pm 0.0047 counts / (day \cdot kg \cdot keV)

, respectively, with a phase fixed at 152.5 days.

Note:

11 pages, 8 figures

WIMP: dark matter
flux: time dependence
dark matter: direct detection
background: time dependence
background: model
energy: threshold
modulation
dark matter: interaction
dark matter: halo
WIMP nucleus: interaction

References(0)

Figures(9)

Loading ...