Accès ouvert déclaré
2024
preprint
Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment
Guanghua Yu, N. Carlin, Jin 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, Shin Hyung Kim, S. K. Kim, W. K. Kim, Y.D. Kim, Y. H. Kim, Y. J. Ko, D. H. Lee, E. K. Lee, Hyung Mok Lee, H.S. Lee, H. Y. Lee, I. S. Lee, J. Lee, Jooyoung Lee, M. H. Lee, S. H. Lee, Seung Mok Lee, Young‐Jin 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, Jong‐Chul 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, Myungwoo Son, N. J. C. Spooner, L. T. Truc, L. Yang
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Résumé fourni par la source
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$σ$ 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.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Sujets associés
Radiation Detection and Scintillator TechnologiesAtomic and Subatomic Physics ResearchNuclear Physics and Applications