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Search for low-mass dark matter with CsI(Tl) crystal detectors

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Title
Search for low-mass dark matter with CsI(Tl) crystal detectors
Author(s)
H. S. Lee; H. Bhang; J. H. Choi; S. Choi; I. S. Hahn; E. J. Jeon; H.W. Joo; Woon Gu Kang; B. H. Kim; G. B. Kim; H. J. Kim; J. H. Kim; K.W. Kim; S. C. Kim; S. K. Kim; Yeongduk Kim; Yong Hamb Kim; J. H. Lee; J. K. Lee; S. J. Lee; D. S. Leonard; Jin Li; J. Li; Y. J. Li; X. R. Li; S. S. Myung; S. L. Olsen; J.W. Park; I. S. Seong; Jungho So; Q. Yue
Publication Date
2014-09
Journal
PHYSICAL REVIEW D, v.90, no.5, pp.052006-1 - 052006-6
Publisher
AMER PHYSICAL SOC
Abstract
We present a search for low-mass (≤ 20 GeV=c2) weakly interacting massive particles (WIMPs), strong candidates of dark matter particles, using the low-background CsI(Tl) detector array of the Korea Invisible Mass Search experiment. With a total data exposure of 24,524.3 kg days, we search for WIMP interaction signals produced by nuclei recoiling from WIMP-nuclear elastic scattering with visible energies between 2 and 4 keVee (electron-equivalent energy). The observed energy distribution of candidate events is consistent with null signals, and upper limits of the WIMP-proton spin-independent interaction are set with a 90% confidence level. The observed limit covers most of the low-mass region of parameter space favored by the DAMA annual modulation signal assuming the standard halo model.
URI
http://pr.ibs.re.kr/handle/8788114/1473
DOI
10.1103/PhysRevD.90.052006
ISSN
2470-0010
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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