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First Direct Search for Inelastic Boosted Dark Matter with COSINE-100

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Title
First Direct Search for Inelastic Boosted Dark Matter with COSINE-100
Author(s)
Changhyon Ha; Adhikari, G; Adhikari, P; de Souza, EB; Carlin, N; Choi, S; Djamal, M; Ezeribe, AC; Hahn, IS; Eun Ju Jeon; Jo, JH; Joo, HW; Woon Gu Kang; Kang, W; Kauer, M; Kim, GS; H Kim; Kim, HJ; Kim, Kyungwon; Nam Young Kim; Kim, SK; Yeongduk Kim; Yong Hamb Kim; Young Ju Ko; Kudryavtsev, VA; Hyun Su Lee; Lee, Jaison; Lee, JY; Moo Hyun Lee; Douglas, Leonard; Lynch, WA; Maruyama, RH; Mouton, F; SL Olsen; Park, BJ; Park, HK; Park, HS; Kang Soon Park; Pitta, RLC; Prihtiadi, H; S. J. Ra; Rott, C; Keonah Shin; A. Scarff; Spooner, NJC; Thompson, WG; Yang, L; Yu, GH
Publication Date
2019-04
Journal
PHYSICAL REVIEW LETTERS, v.122, no.13, pp.131802 -
Publisher
AMER PHYSICAL SOC
Abstract
A search for inelastic boosted dark matter (IBDM) using the COSINE-100 detector with 59.5 days of data is presented. This relativistic dark matter is theorized to interact with the target material through inelastic scattering with electrons, creating a heavier state that subsequently produces standard model particles, such as an electron-positron pair. In this study, we search for this electron-positron pair in coincidence with the initially scattered electron as a signature for an IBDM interaction. No excess over the predicted background event rate is observed. Therefore, we present limits on IBDM interactions under various hypotheses, one of which allows us to explore an area of the dark photon parameter space that has not yet been covered by other experiments. This is the first experimental search for IBDM using a terrestrial detector. © 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6646
ISSN
0031-9007
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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