G. H. Yu, N. Carlin, J. Y. Cho, J. J. Choi, S. Choi, A. C. Ezeribe, L. E. França, C. Ha, I. S. Hahn, S. J. Hollick, E. J. Jeon, H. W. Joo, W. G. Kang, M. Kauer, 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. Kim, Y. J. Ko, 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. Lee, D. S. Leonard, N. T. Luan, V. H. A. Machado, B. B. Manzato, R. H. Maruyama, R. J. Neal, S. L. Olsen, B. J. Park, H. K. Park, H. S. Park, J. C. Park, K. S. Park, S. D. Park, R. L. C. Pitta, H. Prihtiadi, S. J. Ra, C. Rott, K. A. Shin, D. F. F. S. Cavalcante, M. K. Son, N. J. C. Spooner, L. T. Truc, L. Yang
{"title":"Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment","authors":"G. H. Yu, N. Carlin, J. Y. Cho, J. J. Choi, S. Choi, A. C. Ezeribe, L. E. França, C. Ha, I. S. Hahn, S. J. Hollick, E. J. Jeon, H. W. Joo, W. G. Kang, M. Kauer, 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. Kim, Y. J. Ko, 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. Lee, D. S. Leonard, N. T. Luan, V. H. A. Machado, B. B. Manzato, R. H. Maruyama, R. J. Neal, S. L. Olsen, B. J. Park, H. K. Park, H. S. Park, J. C. Park, K. S. Park, S. D. Park, R. L. C. Pitta, H. Prihtiadi, S. J. Ra, C. Rott, K. A. Shin, D. F. F. S. Cavalcante, M. K. Son, N. J. C. Spooner, L. T. Truc, L. Yang","doi":"arxiv-2408.14688","DOIUrl":null,"url":null,"abstract":"COSINE-100 is a direct dark matter search experiment, with the primary goal\nof testing the annual modulation signal observed by DAMA/LIBRA, using the same\ntarget material, NaI(Tl). In previous analyses, we achieved the same 1 keV\nenergy threshold used in the DAMA/LIBRA's analysis that reported an annual\nmodulation signal with 11.6$\\sigma$ significance. In this article, we report an\nimproved analysis that lowered the threshold to 0.7 keV, thanks to the\napplication of Multi-Layer Perception network and a new likelihood parameter\nwith waveforms in the frequency domain. The lower threshold would enable a\nbetter comparison of COSINE-100 with new DAMA results with a 0.75 keV threshold\nand account for differences in quenching factors. Furthermore the lower\nthreshold can enhance COSINE-100's sensitivity to sub-GeV dark matter searches.","PeriodicalId":501374,"journal":{"name":"arXiv - PHYS - Instrumentation and Detectors","volume":"2 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Instrumentation and Detectors","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2408.14688","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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