Adhikari, G., Adhikari, P., de Souza, E.B. et al. (45 more authors) (2019) Search for a dark matter-induced annual modulation signal in NaI(Tl) with the COSINE-100 experiment. Physical Review Letters, 123 (3). 031302. ISSN 0031-9007
Abstract
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⋅years. The COSINE-100 experiment, consisting of 106\,kg of NaI(Tl) target, is designed to carry out a model-independent test of DAMA/LIBRA's claim by searching for the same annual modulation signal using the same NaI(Tl) target. The crystal data show 2.7 counts/keV/kg/day 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 at 0.0092±0.0067 counts/keV/kg/day and 127.2±45.9 days, respectively.
Metadata
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Copyright, Publisher and Additional Information: | © 2019 American Physical Society. This is an author-produced version of a paper subsequently published in Physical Review Letters. Uploaded in accordance with the publisher's self-archiving policy. | ||||||||
Keywords: | COSINE; dark matter; sodium iodide; WIMP; direct detection; annual modulation | ||||||||
Dates: |
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Institution: | The University of Sheffield | ||||||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) | ||||||||
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Depositing User: | Symplectic Sheffield | ||||||||
Date Deposited: | 25 Apr 2019 13:27 | ||||||||
Last Modified: | 24 Nov 2020 16:49 | ||||||||
Status: | Published | ||||||||
Publisher: | American Physical Society | ||||||||
Refereed: | Yes | ||||||||
Identification Number: | https://doi.org/10.1103/PhysRevLett.123.031302 |