Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment
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 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.
Authors
- Nguyễn Thành Luân (ORCID: https://orcid.org/0000-0002-0254-2730)
- N.J.C. Spooner
- H. J. Kim (ORCID: https://orcid.org/0000-0001-9787-4684)
- Y. J. Ko (ORCID: https://orcid.org/0000-0002-5055-8745)
- J. Lee
- D.H. Lee
- M.H. Lee
- R. L. C. Pitta (ORCID: https://orcid.org/0000-0003-1295-0508)
- B. J. Park
- Y.D. Kim
- 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
- Sophia J. Hollick (ORCID: https://orcid.org/0000-0001-7728-7597)
- E. K. Lee
- Y.H. Kim
- H.S. Park
- L. E. França (ORCID: https://orcid.org/0000-0002-2911-6803)
- Hyun‐Woo Joo (ORCID: https://orcid.org/0000-0002-5122-4202)
- K. A. Shin
- H.K. Park
- J.Y. Lee
- S. L. Olsen (ORCID: https://orcid.org/0000-0002-6388-9885)
- I.S. Lee
- H. Prihtiadi (ORCID: https://orcid.org/0000-0001-9541-8087)
- R. Maruyama (ORCID: https://orcid.org/0000-0003-2794-512X)
- Seong Keun Kim (ORCID: https://orcid.org/0000-0001-8712-7167)
- C. Rott (ORCID: https://orcid.org/0000-0002-6958-6033)
- Myungwoo Son (ORCID: https://orcid.org/0000-0002-5854-6386)
- S.H. Kim
- S. H. Lee (ORCID: https://orcid.org/0000-0002-8100-2280)
- S. M. Lee
- M. Kauer
- K.W. Kim
- K.S. Park
- H.S. Lee
- H. Y. Lee
- Soon‐Dong Park (ORCID: https://orcid.org/0009-0008-0556-3183)
- E. J. Jeon (ORCID: https://orcid.org/0000-0001-5942-8907)
- I. S. Hahn
- L. T. Yang (ORCID: https://orcid.org/0000-0002-1859-3655)
- C. Ha (ORCID: https://orcid.org/0000-0002-9598-8589)
- Jong-Chul Park (ORCID: https://orcid.org/0000-0002-1276-875X)
- S. Choi (ORCID: https://orcid.org/0000-0002-9448-969X)
- J. Kim (ORCID: https://orcid.org/0000-0001-9876-6642)
- V. H. A. Machado
- Y.‐J. Lee
- B.H. Kim
- N. Carlin (ORCID: https://orcid.org/0000-0002-9230-1091)
- S.J. Ra
- G. H. Yu
- J. J. Choi
- L. T. Truc
- R. J. Neal
- W. G. Kang
Institutions
- State University of Malang (ID)
- University of Wisconsin–Madison (US)
- Ewha Womans University (KR)
- Seoul National University (KR)
- Universidade de São Paulo (BR)
- 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)
- Chung-Ang University (KR)
- Sungkyunkwan University (KR)
- Korea University of Science and Technology (KR)
- University of Sheffield (GB)
Publication Details
- Journal
- Journal of Instrumentation
- Published
- 2024-12-01
- DOI
- https://doi.org/10.1088/1748-0221/19/12/p12013
- Citations
- 5
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 3.30
Funders
- Science and Technology Facilities Council