Light WIMP search in XMASS
K. Abe, K. Hieda, K. Hiraide, S. Hirano, Y. Kishimoto, K. Kobayashi,, S. Moriyama, K. Nakagawa, M. Nakahata, H. Ogawa, N. Oka, H. Sekiya, A., Shinozaki Y. Suzuki, A. Takeda, O. Takachio, K. Ueshima, D. Umemoto, M., Yamashita, B. S. Yang, S. Tasaka, J. Liu, K. Martens
TL;DR
This paper reports on a search for light dark matter particles using the XMASS liquid xenon detector, achieving a low energy threshold and excluding some parameter space suggested by other experiments.
Contribution
It introduces a low-threshold analysis in XMASS, enabling sensitivity to lighter dark matter particles without event discrimination.
Findings
Excluded part of the light dark matter parameter space.
Achieved a 0.3 keVee analysis threshold.
Used 5591.4 kg·day exposure without recoil discrimination.
Abstract
A search for light dark matter using low-threshold data from the single phase liquid xenon scintillation detector XMASS, has been conducted. Using the entire 835 kg inner volume as target, the analysis threshold can be lowered to 0.3 keVee (electron-equivalent) to search for light dark matter. With low-threshold data corresponding to a 5591.4 kgday exposure of the detector and without discriminating between nuclear-recoil and electronic events, XMASS excludes part of the parameter space favored by other experiments.
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