Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target
G. Adhikari, E. Barbosa de Souza, N. Carlin, J.J. Choi, S. Choi, Mitra Djamal, A. C. Ezeribe, L. E. França, C. Ha, I. S. Hahn, E. J. Jeon, J. H. Jo, Han Wool Joo, W. G. Kang, M. Kauer, Hyounggyu Kim, H. J. Kim, K.W. Kim, Sunghyun Kim, S.K. Kim, Won Kyung Kim, Y.D. Kim, Y. H. Kim, Y. J. Ko, Eun Kyung Lee, Hyunseok Lee, H. S. Lee, Hye Young Lee, In Soo Lee, Jaison Lee, Jooyoung Lee, M. H. Lee, Seo Hyun Lee, Seung Mok Lee, D. S. Leonard, B. B. Manzato, R. Maruyama, Robert J. Neal, S. L. Olsen, Byung Ju Park, Hyang Kyu Park, Hyeonseo Park, Kang-Soon Park, R. L. C. Pitta, H. Prihtiadi, S. Ra, C. Rott, Keon Ah Shin, A. Scarff, N.J.C. Spooner, W. G. Thompson, L. Yang, Gyun Ho Yu
Abstract
We present new constraints on dark matter interactions using 1.7 years of COSINE-100 data. The COSINE-100 experiment, consisting of 106 kg of tallium-doped sodium iodide [NaI(Tl)] target material, is aimed to test DAMA’s claim of dark matter observation using the same NaI(Tl) detectors. Improved event selection requirements, a more precise understanding of the detector background, and the use of a larger dataset considerably enhance the COSINE-100 sensitivity for dark matter detection. No signal consistent with the dark matter interaction is identified and rules out model-dependent dark matter interpretations of the DAMA signals in the specific context of standard halo model with the same NaI(Tl) target for various interaction hypotheses.