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Lowering the energy threshold in COSINE-100 dark matter searches

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Autor(es):
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Adhikari, G. [1, 2] ; de Souza, E. Barbosa [3, 4] ; Carlin, N. [5] ; Choi, J. J. [6] ; Choi, S. [6] ; Djamal, M. [7] ; Ezeribe, A. C. [8] ; Franca, L. E. [5] ; Ha, C. [9] ; Hahn, I. S. [10] ; Jeon, E. J. [11] ; Jo, J. H. [3, 4] ; Kang, W. G. [11] ; Kauer, M. [12, 13] ; Kim, H. [11] ; Kim, H. J. [14] ; Kim, K. W. [11] ; Kim, S. K. [6] ; Kim, Y. D. [2, 11, 15] ; Kim, Y. H. [16, 11, 15] ; Ko, Y. J. [11] ; Lee, E. K. [11] ; Lee, H. S. [11, 15] ; Lee, J. [11] ; Lee, J. Y. [14] ; Lee, M. H. [11, 15] ; Lee, S. H. [11, 15] ; Leonard, D. S. [11] ; Manzato, B. B. [5] ; Maruyama, R. H. [3, 4] ; Neal, R. J. [8] ; Olsen, S. L. [11] ; Park, B. J. [11, 15] ; Park, H. K. [17] ; Park, H. S. [16] ; Park, K. S. [11] ; Pitta, R. L. C. [5] ; Prihtiadi, H. [11] ; Ra, S. J. [11] ; Rott, C. [18] ; Shin, K. A. [11] ; Scarff, A. [8] ; Spooner, N. J. C. [8] ; Thompson, W. G. [3, 4] ; Yang, L. [1] ; Yu, G. H. [18]
Número total de Autores: 46
Afiliação do(s) autor(es):
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[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 - USA
[2] Sejong Univ, Dept Phys, Seoul 05006 - South Korea
[3] Yale Univ, Dept Phys, New Haven, CT 06520 - USA
[4] Yale Univ, Wright Lab, New Haven, CT 06520 - USA
[5] Univ Sao Paulo, Phys Inst, BR-05508090 Sao Paulo - Brazil
[6] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826 - South Korea
[7] Bandung Inst Technol, Dept Phys, Bandung 40132 - Indonesia
[8] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire - England
[9] Chung Ang Univ, Dept Phys, Seoul 06973 - South Korea
[10] Ewha Womans Univ, Dept Sci Educ, Seoul 03760 - South Korea
[11] Inst Basic Sci IBS, Ctr Underground Phys, Daejeon 34126 - South Korea
[12] Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 - USA
[13] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 - USA
[14] Kyungpook Natl Univ, Dept Phys, Daegu 41566 - South Korea
[15] Univ Sci & Technol UST, IBS Sch, Daejeon 34113 - South Korea
[16] Korea Res Inst Stand & Sci, Daejeon 34113 - South Korea
[17] Korea Univ, Dept Accelerator Sci, Sejong 30019 - South Korea
[18] Sungkyunkwan Univ, Dept Phys, Suwon 16419 - South Korea
Número total de Afiliações: 18
Tipo de documento: Artigo Científico
Fonte: Astroparticle Physics; v. 130, JUL 2021.
Citações Web of Science: 2
Resumo

COSINE-100 is a dark matter detection experiment that uses NaI(Tl) crystal detectors operating at the Yangyang underground laboratory in Korea since September 2016. Its main goal is to test the annual modulation observed by the DAMA/LIBRA experiment with the same target medium. Recently DAMA/LIBRA has released data with an energy threshold lowered to 1 keV, and the persistent annual modulation behavior is still observed at 9.5 sigma. By lowering the energy threshold for electron recoils to 1 keV, COSINE-100 annual modulation results can be compared to those of DAMA/LIBRA in a model-independent way. Additionally, the event selection methods provide an access to a few to sub-GeV dark matter particles using constant rate studies. In this article, we discuss the COSINE-100 event selection algorithm, its validation, and efficiencies near the threshold. (C) 2021 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 17/02952-0 - Procura da matéria escura: WIMPs e fótons escuros
Beneficiário:Nelson Carlin Filho
Modalidade de apoio: Auxílio à Pesquisa - Regular