학술논문
Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
Document Type
Working Paper
Author
Collaboration, COSINE-100; 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.
Source
Phys. Rev. Lett. 123, 031302 (2019)
Subject
Language
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$\cdot$years. 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$\pm$0.0067 cpd/kg/keV and 127.2$\pm$45 d, respectively.
Comment: 6 pages, 5 figures, revised version as published in PRL
Comment: 6 pages, 5 figures, revised version as published in PRL