Search for inelastic WIMP nucleus scattering on $^{129}$Xe in data from the XMASS-I experiment [CEA]

http://arxiv.org/abs/1401.4737


A search for inelastic scattering of Weakly Interacting Massive Particles (WIMPs) on the isotope $^{129}$Xe was done in data taken with the single phase liquid xenon detector XMASS at the Kamioka Observatory. Using a restricted volume containing 41 kg of LXe at the very center of our detector we observed no significant excess in 165.9 days of data and derived for e.g. a 50 GeV WIMP an upper limit for its inelastic cross section on $^{129}$Xe nuclei of 3.2 pb at the 90% confidence level.

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Tue, 21 Jan 14
9/91