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

Adhikari, G;Adhikari, P;de Souza, E Barbosa;Carlin, N;Choi, S;Djamal, M;Ezeribe, A C;Ha, C;Hahn, I S;Jeon, E J;Jo, J H;Joo, H W;Kang, W G;Kang, W;Kauer, M;Kim, G S;Kim, H;Kim, H J;Kim, K W;Kim, N Y;Kim, S K;Kim, Y D;Kim, Y H;Ko, Y J;Kudryavtsev, V A;Lee, H S;Lee, J;Lee, J Y;Lee, M H;Leonard, D S;Lynch, W A;Maruyama, R H;Mouton, F;Olsen, S L;Park, B J;Park, H K;Park, H S;Park, K S;Pitta, R L C;Prihtiadi, H;Ra, S J;Rott, C;Shin, K A;Scarff, A;Spooner, N J C;Thompson, W G;Yang, L;Yu, G H;, ;
physical review letters 2019 Vol. 123 pp. 031302
223
adhikari2019searchphysical

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 χ-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.

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DOI:
10.1103/PhysRevLett.123.031302

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ID: 4560
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