Three-year annual modulation search with COSINE-100

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Adhikari, G. ; de Souza, E. Barbosa ; Carlin, N. ; Choi, J. J. ; Choi, S. ; Ezeribe, A. C. ; Franca, L. E. ; Ha, C. ; Hahn, I. S. ; Hollick, S. J. ; Jeon, E. J. ; Jo, J. H. ; Joo, H. W. ; Kang, W. G. ; Kauer, M. ; Kim, H. ; Kim, H. J. ; Kim, J. ; Kim, K. W. ; Kim, S. H. ; Kim, S. K. ; Kim, W. K. ; Kim, Y. D. ; Kim, Y. H. ; Ko, Y. J. ; Kwon, H. J. ; Lee, D. H. ; Lee, E. K. ; Lee, H. ; Lee, H. S. ; Lee, H. Y. ; Lee, I. S. ; Lee, J. ; Lee, J. Y. ; Lee, M. H. ; Lee, S. H. ; Lee, S. M. ; Leonard, D. S. ; Manzato, B. B. ; Maruyama, R. H. ; Neal, R. J. ; Park, B. J. ; Park, H. K. ; Park, H. S. ; Park, K. S. ; Park, S. D. ; Pitta, R. L. C. ; Prihtiadi, H. ; Ra, S. J. ; Rott, C. ; Shin, K. A. ; Scarff, A. ; Spooner, N. J. C. ; Thompson, W. G. ; Yang, L. ; Yu, G. H. ; COSINE-100 Collaboration

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 106, n. 5, p. 11-pg., 2022-09-14.

Resumo

COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of dark matter discovery by searching for a dark-matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the annual modulation signal from a dataset with a 2.82 yr livetime utilizing an active mass of 61.3 kg for a total exposure of 173 kg middot yr. This new result features an improved event selection that allows for both lowering the energy threshold to 1 keV and a more precise time-dependent background model. In the 1-6 and 2-6 keV energy intervals, we observe best-fit values for the modulation amplitude of 0.0067 +/- 0.0042 and 0.0051 +/- 0.0047 counts/(day middot kg middot keV), respectively, with a phase fixed at 152.5 days. (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