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Three-year annual modulation search with COSINE-100

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arxiv 2111.08863 v2 pith:W56S2QQ7 submitted 2021-11-17 hep-ex astro-ph.IMphysics.ins-det

Three-year annual modulation search with COSINE-100

COSINE-100 Collaboration: G. Adhikari , E. Barbosa de Souza , N. Carlin , J. J. Choi , S. Choi , A. C. Ezeribe , L. E. Fran\c{c}a , C. Ha
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I. S. Hahn S. J. Hollick E. J. Jeon J. H. Jo H. W. Joo W. G. Kang M. Kauer H. Kim H. J. Kim J. Kim K. W. Kim S. H. Kim S. K. Kim W. K. Kim Y. D. Kim Y. H. Kim Y. J. Ko H. J. Kwon 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. Lee D. S. Leonard B. B. Manzato R. H. Maruyama R. J. Neal S. L. Olsen B. J. Park H. K. Park H. S. Park K. S. Park S. D. 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 hep-ex astro-ph.IMphysics.ins-det
keywords modulationannualcdotdarkcosine-100energymattersignal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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$\cdot$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 keV and 2-6 keV energy intervals, we observe best-fit values for the modulation amplitude of 0.0067$\pm$0.0042 and 0.0051$\pm$0.0047 counts/(day$\cdot$kg$\cdot$keV), respectively, with a phase fixed at 152.5 days.

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Cited by 2 Pith papers

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  1. Dark Matter Heating of Compact Stars Beyond Capture: A Relativistic Framework for Energy Deposition by Particle Beams

    hep-ph 2026-02 conditional novelty 6.0

    A new relativistic formalism computes capture and energy deposition of directed particle beams in compact stars, applied to blazar-boosted dark matter heating of white dwarfs and neutron stars.

  2. Search for Annual Modulation in Combined ANAIS 112 and COSINE 100 Data using Bayesian Model Comparison

    hep-ex 2025-12 conditional novelty 4.0

    Bayesian model comparison of combined ANAIS-112/COSINE-100 residuals finds no meaningful support for an annual cosine modulation (ln Bayes factor < 1.2).