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

Item Type:	Article
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
Copyright, Publisher and Additional Information:	© 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:	Published: 14 September 2022 Published (online): 14 September 2022 Accepted: 9 August 2022
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Funding Information:	Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/K001337/1 Science and Technology Facilities Council ST/N000277/1
Depositing User:	Symplectic Sheffield
Date Deposited:	01 Nov 2022 14:07
Last Modified:	01 Nov 2022 14:07
Status:	Published
Publisher:	American Physical Society (APS)
Refereed:	Yes
Identification Number:	10.1103/physrevd.106.052005
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:192460

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Three-year annual modulation search with COSINE-100

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