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Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment

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arxiv 1903.10098 v2 pith:27M5QDR4 submitted 2019-03-25 astro-ph.IM astro-ph.COhep-exphysics.ins-det

Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment

COSINE-100 Collaboration: G. Adhikari , P. Adhikari , E. Barbosa de Souza , N. Carlin , S. Choi , M. Djamal , A. C. Ezeribe , C. Ha
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I. S. Hahn E. J. Jeon J. H. Jo H. W. Joo W. G. Kang W. Kang M. Kauer G. S. Kim H. Kim H. J. Kim K. W. Kim N. Y. Kim S. K. Kim Y. D. Kim Y. H. Kim Y. J. Ko V. A. Kudryavtsev H. S. Lee J. Lee J. Y. Lee M. H. Lee D. S. Leonard W. A. Lynch R. H. Maruyama F. Mouton S. L. Olsen B. J. Park H. K. Park H. S. Park K. S. Park R. L. C. Pitta H. Prihtiadi S. J. Ra C. Rott K. A. Shin A. Scarff N. J. C. Spooner W. G. Thompson L. Yang G. H. Yu
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classification astro-ph.IM astro-ph.COhep-exphysics.ins-det
keywords modulationannualcosine-100signaldarkdataexperimentmatter-induced
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We present new constraints on the dark matter-induced annual modulation signal using 1.7 years, of COSINE-100 data with a total exposure of 97.7 kg$\cdot$years. The COSINE-100 experiment, consisting of 106 kg of NaI(Tl) target material, is designed to carry out a model-independent test of DAMA/LIBRA's claim of WIMP discovery by searching for the same annual modulation signal using the same NaI(Tl) target. The crystal data show a 2.7 cpd/kg/keV background rate on average in the 2--6 keV energy region of interest. Using a $\chi$-squared minimization method we observe best fit values for modulation amplitude and phase of 0.0092$\pm$0.0067 cpd/kg/keV and 127.2$\pm$45 d, respectively.

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Cited by 2 Pith papers

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  1. DAMA/LIBRA and dark matter: decisive tension or contrived cancellation

    hep-ph 2025-10 conditional novelty 6.0

    DAMA's annual modulation signal is incompatible at >5σ with ANAIS-112 and COSINE-100 under physical dark-matter recoil models; reconciliation requires contrived opposite-sign sodium/iodine tuning.

  2. Probing Long-Lived Particle Production in Muon Decays at the SNS with a Highly Capable Hydrocarbon Detector

    hep-ex 2026-06 unverdicted novelty 4.0

    Proposes a hydrocarbon detector at SNS for order-of-magnitude better sensitivity to 10-100 MeV axion-like particles and heavy neutral leptons via e+e- decays from muon decays at rest.