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Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment

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Title
Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
Author(s)
Adhikari, G; Adhikari, P; de Souza, EB; Carlin, N; Choi, S; Djamal, M; Ezeribe, AC; Ha, Chang Hyon; Hahn, IS; Eun Ju Jeon; Jo, JH; Joo, HW; Woon Gu Kang; Kang, W; Kauer, M; Kim, GS; H Kim; Kim, HJ; Kyungwon Kim; Nam Young Kim; Kim, SK; Yeongduk Kim; Yong Hamb Kim; Young Ju Ko; Kudryavtsev, VA; Hyun Su Lee; Jaison Lee; Lee, JY; Lee, Moo Hyun; Douglas, Leonard; Lynch, WA; Maruyama, RH; Mouton, F; Olsen, SL; Park, BJ; Park, HK; Park, HS; Park, Kang Soon; Pitta, RLC; Prihtiadi, H; Ra, Se Jin; Rott, C; Shin, Keonah; Scarff, A; Spooner, NJC; Thompson, WG; Yang, L; Yu, GH
Publication Date
2019-07
Journal
PHYSICAL REVIEW LETTERS, v.123, no.3, pp.031302 -
Publisher
AMER PHYSICAL SOC
Abstract
We present new constraints on the dark matter-induced annual modulation signal using 1.7 years of COSINE-100 data with a total exposure of 97.7 kg yr. The COSINE-100 experiment, consisting of 106 kg of NaI(Tl) target material, is designed to carry out a model-independent test of DAMA/LIBRA's claim of WIMP discovery by searching for the same annual modulation signal using the same NaI(Tl) target. The crystal data show a 2.7 cpd/kg/keV background rate on average in the 2-6 keV energy region of interest. Using a chi-squared minimization method we observe best fit values for modulation amplitude and phase of 0.0092 +/- 0.0067 cpd/kg/keV and 127.2 +/- 45.9 d, respectively. © 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6644
ISSN
0031-9007
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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