Limits on WIMP Dark Matter with NaI(Tl) Crystals in Three Years of COSINE-100 Data
We report limits on weakly interacting massive particle (WIMP) dark matter derived from three years of data collected by the COSINE-100 experiment with NaI(Tl) crystals, achieving an improved energy threshold of 0.7 keV. This lowered threshold enhances sensitivity in the sub-GeV mass range, extending the reach for direct detection of low-mass dark matter. Although no excess of WIMP-like events was observed, the increased sensitivity enabled a model-insensitive comparison between the expected WIMP signal rate-based on mass limits from our data-and DAMA's reported modulation amplitude. Our findings strongly disfavor the DAMA signal as originating from WIMP interactions, fully excluding DAMA/LIBRA 3σ allowed regions and providing enhanced WIMP mass limits by an order of magnitude in the spin-independent model compared to previous results. In the spin-dependent model, cross-section upper limits were obtained in the mass range [0.1-5.0] GeV/c^{2}, with additional sensitivity to sub-GeV WIMPs through the inclusion of the Migdal effect. These results represent substantial progress in low-mass dark matter exploration and reinforce constraints on the longstanding DAMA claim.
Authors
- N.J.C. Spooner
- Y. J. Ko (ORCID: https://orcid.org/0000-0002-5055-8745)
- Y. H. Kim
- R. L. C. Pitta (ORCID: https://orcid.org/0000-0003-1295-0508)
- H. K. Park
- N. T. Luan (ORCID: https://orcid.org/0009-0008-6617-2522)
- H. S. Park
- B. B. Manzato
- D. F. F. S. Cavalcante
- Jin Cho (ORCID: https://orcid.org/0000-0002-0984-7852)
- H. Lee
- A. C. Ezeribe (ORCID: https://orcid.org/0000-0003-1604-2304)
- D. S. Leonard (ORCID: https://orcid.org/0009-0006-7159-4792)
- W. K. Kim
- R. J. Neal
- E. K. Lee
- Sophia J. Hollick (ORCID: https://orcid.org/0000-0001-7728-7597)
- D. H. Lee
- Y. D. Kim
- M. H. Lee
- Ji Yeoun Lee (ORCID: https://orcid.org/0000-0003-0464-7605)
- K. S. Park
- I. S. Hahn
- Jong‐Chul Park (ORCID: https://orcid.org/0000-0003-0083-5991)
- H. S. Lee
- S. H. Kim
- S. L. Olsen
- Y. J. Lee
- B. J. Park
- H. Prihtiadi (ORCID: https://orcid.org/0000-0001-9541-8087)
- R. Maruyama (ORCID: https://orcid.org/0000-0003-2794-512X)
- W. G. Kang
- C. Rott (ORCID: https://orcid.org/0000-0002-6958-6033)
- Myungwoo Son (ORCID: https://orcid.org/0000-0002-5854-6386)
- H. J. Kim
- S. K. Kim
- M. Kauer
- G. H. Yu (ORCID: https://orcid.org/0000-0002-8982-8300)
- K. W. Kim
- H. W. Joo
- J. J. Choi
- E. J. Jeon (ORCID: https://orcid.org/0000-0001-5942-8907)
- S. D. Park
- I. S. Lee
- N. Carlin
- B. H. Kim
- L. T. Yang (ORCID: https://orcid.org/0000-0002-1859-3655)
- C. Ha (ORCID: https://orcid.org/0000-0002-9598-8589)
- L. E. França
- Jungwoo Lee (ORCID: https://orcid.org/0000-0002-6804-980X)
- Hye Young Lee (ORCID: https://orcid.org/0000-0002-6593-8556)
- S. M. Lee
- J. Kim (ORCID: https://orcid.org/0000-0001-9876-6642)
- S. Choi (ORCID: https://orcid.org/0000-0001-6225-9876)
- V. H. A. Machado
- K. A. Shin
- S. H. Lee
- L. T. Truc
- S. J.
Institutions
- State University of Malang (ID)
- University of Science and Technology (YE)
- University of Wisconsin–Madison (US)
- Ewha Womans University (KR)
- Seoul National University (KR)
- Chungnam National University (KR)
- Korea University (KR)
- University of Utah (US)
- Korea Research Institute of Standards and Science (KR)
- Kyungpook National University (KR)
- Yale University (US)
- University of California San Diego (US)
- Institute for Basic Science (KR)
- Ewha Womans University Medical Center (KR)
- Chung-Ang University (KR)
- Sungkyunkwan University (KR)
- Korea University of Science and Technology (KR)
- University of Sheffield (GB)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-10-22
- DOI
- https://doi.org/10.1103/77p2-rnbw
- Citations
- 2
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 3.74