Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment

  • Yu, G. H.; 
  • Carlin, N.; 
  • Cho, J. Y.; 
  • Choi, J. J.; 
  • Choi, S.; 
  • ... Kim, H. J.; 
  • 외 53명
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초록

COSINE-100 is a direct dark matter search experiment, with the primary goal of testing the annual modulation signal observed by DAMA/LIBRA, using the same target material, NaI(Tl). In previous analyses, we achieved the same 1 keV energy threshold used in the DAMA/LIBRA's analysis that reported an annual modulation signal with 11.6 sigma significance. In this article, we report an improved analysis that lowered the threshold to 0.7 keV, thanks to the application of Multi-Layer Perception network and a new likelihood parameter with waveforms in the frequency domain. The lower threshold would enable a better comparison of COSINE-100 with new DAMA results with a 0.75 keV threshold and account for differences in quenching factors. Furthermore the lower threshold can enhance COSINE-100's sensitivity to sub-GeV dark matter searches.

키워드

Analysis and statistical methods; Dark Matter detectors (WIMPs, axions, etc.); Data reduction methods; Gamma detectors (scintillators, CZT, HPGe, HgI etc); DARK-MATTER SEARCH; DAMA/LIBRA
제목
Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment
저자
Yu, G. H.; Carlin, N.; Cho, J. Y.; Choi, J. J.; Choi, S.; Ezeribe, A. C.; Franca, L. E. .; Ha, C.; Hahn, I. S.; Hollick, S. J.; Jeon, E. J.; Joo, H. W.; Kang, W. G.; Kauer, M.; Kim, B. H.; Kim, H. J.; Kim, J.; Kim, K. W.; Kim, S. H.; Kim, S. K.; Kim, W. K.; Kim, Y. D.; Kim, Y. H.; Ko, Y. J.; Lee, D. H.; Lee, E. K.; Lee, H.; Lee, H. S.; Lee, H. Y.; Lee, I. S.; Lee, J.; Lee, J. Y.; Lee, M. H.; Lee, S. H.; Lee, S. M.; Lee, Y. J.; Leonard, D. S.; Luan, N. T.; Machado, V. H. A.; Manzato, B. B.; Maruyama, R. H.; Neal, R. J.; Olsen, S. L.; Park, B. J.; Park, H. K.; Park, H. S.; Park, J. C.; Park, K. S.; Park, S. D.; Pitta, R. L. C.; Prihtiadi, H.; Ra, S. J.; Rott, C.; Shin, K. A.; Cavalcante, D. F. F. S.; Son, M. K.; Spooner, N. J. C.; Truc, L. T.; Yang, L.
DOI
10.1088/1748-0221/19/12/P12013
발행일
2024-12
유형
Article
저널명
Journal of Instrumentation
권
19
호
12