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COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models

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Title
COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models
Author(s)
Adhikari, G; Adhikari, P; de Souza, EB; Carlin, N; Choi, S; Djamal, M; Ezeribe, AC; Changhyon Ha; Hahn, IS; Eunju Jeon; Jo, JH; Joo, HW; Woon Gu Kang; Kang, W; Kauer, M; Kim, GS; H Kim; Kim, HJ; Kyungwon Kim; Nam Young Kim; Kim, SK; Yeongduk Kim; Yong Hamb Kim; Young Ju Ko; Kudryavtsev, VA; Hyun Su Lee; Jaison Lee; Jeong Yeon Lee; Moo Hyun Lee; Leonard Douglas; Lynch, WA; Maruyama, RH; Mouton, F; SL Olsen; Park, BJ; Park, HK; Park, HS; Kang Soon Park; Pitta, RLC; Prihtiadi, H; SJ Ra; Rott, C; Keonah Shin; Scarff, A; Spooner, NJC; Thompson, WG; Yang, L; Yu, GH; Kang, S; Scopel, S; Tomar, G; Yoon, JH
Publication Date
2019-06
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v.2019, no.6, pp.48 -
Publisher
IOP PUBLISHING LTD
Abstract
Assuming a standard Maxwellian for the WIMP velocity distribution, we obtain the bounds from null WIMP search results of 59.5 days of COSINE-100 data on the DAMA/LIBRA-phase2 modulation effect within the context of the non-relativistic effective theory of WIMP-nucleus scattering. Here, we systematically assume that one of the effective operators allowed by Galilean invariance dominates in the effective Hamiltonian of a spin-1/2 dark matter (DM) particle. We find that, although DAMA/LIBRA and COSINE-100 use the same sodium-iodide target, the comparison of the two results still depends on the particle-physics model. This is mainly due to two reasons: i) the WIMP signal spectral shape; ii) the expected modulation fractions, when the upper bound on the time-averaged rate in COSINE-100 is converted into a constraint on the annual modulation component in DAMA/LIBRA. We find that the latter effect is the dominant one. For several effective operators the expected modulation fractions are larger than in the standard spin-independent or spin-dependent interaction cases. As a consequence, compatibility between the modulation effect observed in DAMA/LIBRA and the null result from COSINE-100 is still possible for several non-relativistic operators. At low WIMP masses such relatively high values of the modulation fractions arise because COSINE-100 is mainly sensitive to WIMP-sodium scattering events, due to the higher threshold compared to DAMA/LIBRA. A next COSINE analysis is expected to have a full sensitivity for the 5 a region of DAMA/LIBRA. c 2019 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/6645
ISSN
1475-7516
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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