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액시온 및 극한상호작용 연구단
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Search for WIMP- 129 Xe inelastic scattering with particle identification in XMASS-I

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Title
Search for WIMP- 129 Xe inelastic scattering with particle identification in XMASS-I
Author(s)
Suzuki T.; Abe K.; Hiraide K.; Ichimura K.; Kishimoto Y.; Kobayashi K.; Kobayashi M.; Moriyama S.; Nakahata M.; Ogawa H.; Sato K.; Sekiya H.; 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
2019-07
Journal
ASTROPARTICLE PHYSICS, v.110, no., pp.1 - 7
Publisher
ELSEVIER SCIENCE BV
Abstract
A search for Weakly Interacting Massive Particles (WIMPs) was conducted with the single-phase liquid-xenon detector XMASS through inelastic scattering in which 129 Xe nuclei were excited, using an exposure (327 kg × 800.0 days) 48 times larger than that of our previous study. The inelastic excitation sensitivity was improved by detailed evaluation of background, event classification based on scintillation timing that distinguished γ-rays and β-rays, and simultaneous fitting of the energy spectra of γ-like and β-like samples. No evidence of a WIMP signal was found. Thus, we set the upper limits of the inelastic channel cross section at 90% confidence level, for example, 4.1×10 −39 cm 2 for a 200 GeV/c 2 WIMP. This result provides the most stringent limits on the SD WIMP-neutron interaction and is better by a factor of 7.7 at 200 GeV/c 2 than the existing experimental limit. © 2019 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/6911
ISSN
0927-6505
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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