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Comparison between DAMA/LIBRA and COSINE-100 in the light of quenching factors

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Title
Comparison between DAMA/LIBRA and COSINE-100 in the light of quenching factors
Author(s)
Young Ju Ko; Adhikari, G; Adhikari, P; de Souza, EB; Carlin, N; Choi, JJ; Choi, S; Djamal, M; Ezeribe, AC; Chang Hyon Ha; Hahn, IS; Eun Ju Jeon; Jo, JH; Woon Gu Kang; Kauer, M; Kim, GS; H. Kim; Kim, HJ; Kyungwon Kim; Nam Young Kim; Kim, SK; Yeongduk Kim; Yong Hamb Kim; Eun Kyoung Lee; Hyun Su Lee; Jaison Lee; Lee, JY; Moo Hyun Lee; Sunghoon Lee; Leonard Douglas; Lynch, WA; Manzato, BB; Maruyama, RH; Neal, RJ; S.L. Olsen; B.J. Park; Park, HK; Park, HS; Kang Soon Park; Pitta, RLC; Prihtiadi, H; S.J. Ra; Rott, C; Keonah Shin; Scarff, A; Spooner, NJC; Thompson, WG; Yango, L; Yui, GH
Publication Date
2019-11
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v., no.11, pp.008 -
Publisher
IOP PUBLISHING LTD
Abstract
There is a long standing debate about whether or not the annual modulation signal reported by the DAMA/LIBRA collaboration is induced by Weakly Interacting Massive Particles (WIMP) in the galaxy's dark matter halo scattering from nuclides in their NaI(Tl) crystal target/detector. This is because regions of WIMP-mass vs. WIMP-nucleon cross-section parameter space that can accommodate the DAMA/LIBRA-phase1 modulation signal in the context of the standard WIMP dark matter galactic halo and isospin-conserving (canonical), spin-independent (SI) WIMP-nucleon interactions have been excluded by many of other dark matter search experiments including COSINE-100, which uses the same NaI(Tl) target/detector material. Moreover, the recently released DAMA/LIBRA-phase2 results are inconsistent with an interpretation as WIMP-nuclide scattering via the canonical SI interaction and prefer, instead, isospin-violating or spin-dependent interactions. Dark matter interpretations of the DAMA/LIBRA signal are sensitive to the NaI(Tl) scintillation efficiency for nuclear recoils, which is characterized by so-called quenching factors (QF), and the QF values used in previous studies differ significantly from recently reported measurements, which may have led to incorrect interpretations of the DAMA/LIBRA signal. In this article, the compatibility of the DAMA/LIBRA and COSINE-100 results, in light of the new QF measurements is examined for different possible types of WIMP-nucleon interactions. The resulting allowed parameter space regions associated with the DAMA/LIBRA signal are explicitly compared with 90% confidence level upper limits from the initial 59.5 day COSINE-100 exposure. With the newly measured QF values, the allowed 3 sigma regions from the DAMA/LIBRA data are still generally excluded by the COSINE-100 data. c 2019 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/7067
ISSN
1475-7516
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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