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액시온 및 극한상호작용 연구단
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Search for sub-GeV dark matter by annual modulation using XMASS-I detector

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Title
Search for sub-GeV dark matter by annual modulation using XMASS-I detector
Author(s)
XMASS Collaboration; Kobayashi M.; Abe K.; Hiraide K.; Ichimura K.; Kishimoto Y.; Kobayashi K.; Moriyama S.; Nakahata M.; Ogawa H.; Sato K.; Sekiya H.; Suzuki T.; Takeda A.; Tasaka S.; Yamashita M.; Byeong Su Yang; Nam Young Kim; Yeongduk Kim; Itow Y.; Kanzawa K.; Masuda K.; Martens K.; Suzuki Y.; Xu B.D.; Miuchi K.; Oka N.; Takeuchi Y.; Yong Hamb Kim; Lee K.B.; Lee M.K.; Fukuda Y.; Miyasaka M.; Nishijima K.; Fushimi K.; Kanzaki G.; Nakamura S.
Publication Date
2019-08
Journal
PHYSICS LETTERS B, v.795, no., pp.308 - 313
Publisher
ELSEVIER SCIENCE BV
Abstract
© 2019 The AuthorA search for dark matter (DM) with mass in the sub-GeV region (0.32–1 GeV) was conducted by looking for an annual modulation signal in XMASS, a single-phase liquid xenon detector. Inelastic nuclear scattering accompanied by bremsstrahlung emission was used to search down to an electron equivalent energy of 1 keV. The data used had a live time of 2.8 years (3.5 years in calendar time), resulting in a total exposure of 2.38 ton-years. No significant modulation signal was observed and 90% confidence level upper limits of 1.6×10−33 cm2 at 0.5 GeV was set for the DM-nucleon cross section. This is the first experimental result of a search for DM mediated by the bremsstrahlung effect. In addition, a search for DM with mass in the multi-GeV region (4–20 GeV) was conducted with a lower energy threshold than previous analysis of XMASS. Elastic nuclear scattering was used to search down to a nuclear recoil equivalent energy of 2.3 keV, and upper limits of 2.9 ×10−42 cm2 at 8 GeV was obtained
URI
https://pr.ibs.re.kr/handle/8788114/6898
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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