A direct dark matter search in XMASS-I

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Title
A direct dark matter search in XMASS-I
Author(s)
XMASS Collaboration; K. Abe; K. Hiraide; K. Ichimura; Y. Kishimoto; K. Kobayashi; M. Kobayashi; S. Moriyama; M. Nakahata; T. Norita; H. Ogawa; K. Sato; H. Sekiya; O. Takachio; A. Takeda; S. Tasaka; M. Yamashita; B.S. Yang; Kim, Nam Young; Kim, Yeongduk; Y. Itow; K. Kanzawa; R. Kegasa; K. Masuda; H. Takiya; K. Fushimi; G, Zabzaju; K. Martens; Y. Suzuki; B.D. Xu; R. Fujita; K. Hosokawa; K. Miuchi; N. Oka; Y. Takeuchi; Kim, Yong Hamb; K. B. Lee; M. K. Lee; Y. Fukuda; M. Miyasaka; K. Nishijima; S. Nakamura
Publication Date
2019-02
Journal
PHYSICS LETTERS B, v.789, no., pp.45 - 53
Publisher
ELSEVIER SCIENCE BV
Abstract
A search for dark matter using an underground single-phase liquid xenon detector was conducted at the Kamioka Observatory in Japan, particularly for Weakly Interacting Massive Particles (WIMPs). We have used 705.9 live days of data in a fiducial volume containing 97 kg of liquid xenon at the center of the detector. The event rate in the fiducial volume after the data reduction was (4.2±0.2)×10 −3 day −1 kg −1 keV −1 ee at 5keV ee , with a signal efficiency of 20% . All the remaining events are consistent with our background evaluation, mostly of the "mis-reconstructed events" originated from 210 Pb in the copper plates lining the detector's inner surface. The obtained upper limit on a spin-independent WIMP-nucleon cross section was 2.2×10 −44 cm 2 for a WIMP mass of 60GeV/c 2 at the 90% confidence level, which was the most stringent limit among results from single-phase liquid xenon detectors. ©2018 The Author.
URI
https://pr.ibs.re.kr/handle/8788114/5685
ISSN
0370-2693
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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