COSINE-100全数据集对DAMA/LIBRA的年度调制信号提出了挑战。

COSINE-100 full dataset challenges the annual modulation signal of DAMA/LIBRA.

作者信息

Carlin Nelson, Cho Jae Young, Choi Jae Jin, Choi Seonho, Ezeribe Anthony C, França Luis Eduardo, Ha Chang Hyon, Hahn In Sik, Hollick Sophia J, Jeon Eunju, Joo Han Wool, Kang Woon Gu, Kauer Matthew, Kim Bongho, Kim Hongjoo, Kim Jinyoung, Kim Kyungwon, Kim SungHyun, Kim Sun Kee, Kim Won Kyung, Kim Yeongduk, Kim Yong-Hamb, Ko Young Ju, Lee Doohyeok, Lee Eun Kyung, Lee Hyunseok, Lee Hyun Su, Lee Hye Young, Lee In Soo, Lee Jaison, Lee Jooyoung, Lee Moo Hyun, Lee Seo Hyun, Lee Seung Mok, Lee Yujin, Leonard Douglas S, Luan Nguyen Thanh, de Almeida Machado Vitor Hugo, Manzato Bruno B, Maruyama Reina H, Neal Robert J, Olsen Stephen L, Park Byung Ju, Park Hyang Kyu, Park Hyeonseo, Park Jong-Chul, Park Kangsoon, Park Se Dong, Pitta Ricardo L C, Prihtiadi Hafizh, Ra Sejin, Rott Carsten, Shin Keon Ah, Cavalcante David F F S, Son Min Ki, Spooner Neil J C, Truc Lam Tan, Yang Liang, Yu Gyun Ho

机构信息

Physics Institute, University of São Paulo, 05508-090 São Paulo, Brazil.

Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea.

出版信息

Sci Adv. 2025 Sep 5;11(36):eadv6503. doi: 10.1126/sciadv.adv6503. Epub 2025 Sep 3.

DOI:10.1126/sciadv.adv6503

PMID:40901955

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12407068/

Abstract

For over 25 years, the DAMA/LIBRA collaboration has claimed to observe an annual modulation signal, suggesting the existence of dark matter interactions. However, no experiment using different target materials has observed a dark matter signal consistent with their result. To address this puzzle, the COSINE-100 collaboration conducted a model-independent test using sodium iodide crystal detectors, the same target material as DAMA/LIBRA. Analyzing data collected over 6.4 years by the effective mass of 61.3 kilograms, with improved energy calibration and time-dependent background modeling, we found no evidence of an annual modulation signal, challenging the DAMA/LIBRA result with a confidence level greater than 3σ. This finding represents a substantial step toward resolving the long-standing debate surrounding DAMA/LIBRA's dark matter claim, indicating that the observed modulation is unlikely to be caused by dark matter interactions.

摘要

25多年来，DAMA/LIBRA合作团队一直声称观测到了年度调制信号，这表明存在暗物质相互作用。然而，使用不同靶材料的实验均未观测到与他们的结果一致的暗物质信号。为了解决这一谜题，COSINE-100合作团队使用碘化钠晶体探测器进行了一次与模型无关的测试，该探测器与DAMA/LIBRA使用的是相同的靶材料。通过对有效质量为61.3千克的探测器在6.4年时间内收集的数据进行分析，并改进了能量校准和随时间变化的本底建模，我们没有发现年度调制信号的证据，以大于3σ的置信水平对DAMA/LIBRA的结果提出了质疑。这一发现朝着解决围绕DAMA/LIBRA暗物质声明的长期争论迈出了重要一步，表明观测到的调制不太可能是由暗物质相互作用引起的。