Three-year annual modulation search with COSINE-100

Abstract

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 · 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 � 0.0042 and 0.0051 � 0.0047 counts=ðday · kg · keVÞ, respectively, with a phase fixed at 152.5 days.

Metadata

Authors/Creators:

Adhikari, G
Barbosa de Souza, E
Carlin, N
Choi, JJ
Choi, S
Ezeribe, AC https://orcid.org/0000-0003-1604-2304
França, LE
Ha, C
Hahn, IS
Hollick, SJ
Jeon, EJ
Jo, JH
Joo, HW
Kang, WG
Kauer, M
Kim, H
Kim, HJ
Kim, J
Kim, KW
Kim, SH
Kim, SK
Kim, WK
Kim, YD
Kim, YH
Ko, YJ
Kwon, HJ
Lee, DH
Lee, EK
Lee, H
Lee, HS
Lee, HY
Lee, IS
Lee, J
Lee, JY
Lee, MH
Lee, SH
Lee, SM
Leonard, DS
Manzato, BB
Maruyama, RH
Neal, RJ
Park, BJ
Park, HK
Park, HS
Park, KS
Park, SD
Pitta, RLC
Prihtiadi, H
Ra, SJ
Rott, C
Shin, KA
Scarff, A
Spooner, NJC
Thompson, WG
Yang, L
Yu, GH

© 2022 The Authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation,and DOI. Funded by SCOAP

Keywords:

Particle astrophysics; Particle dark matter; Weakly interacting massive particles; Dark matter detectors

Dates: