论文标题
在Xenon1t中搜索WIMP暗物质的非弹性散射
Search for inelastic scattering of WIMP dark matter in XENON1T
论文作者
论文摘要
我们报告了在Xenon1t暗物质实验中搜索弱相互作用的巨颗粒(WIMP)的无弹性散射的结果。散射$^{129} $ XE是无弹性wimp相互作用的最敏感的探测器,其签名为39.6 kev de-excitation光子与核后坐力同时检测到。使用0.89吨的暴露,我们没有发现无弹性wimp散射的证据,其显着性超过2 $σ$。轮廓类样比分析用于对WIMP-NUCLEUS相互作用的横截面设置上限。我们排除了比100 Gev/c $ {}^2 $重的新的参数空间,其最高上限为$ 3.3 \ times 10^{ - 39} $ cm $ {}^2 $ 130 GEV/c $ {}^2 $ {}^2 $ wimps在90 \%的信心水平上。
We report the results of a search for the inelastic scattering of weakly interacting massive particles (WIMPs) in the XENON1T dark matter experiment. Scattering off $^{129}$Xe is the most sensitive probe of inelastic WIMP interactions, with a signature of a 39.6 keV de-excitation photon detected simultaneously with the nuclear recoil. Using an exposure of 0.89 tonne-years, we find no evidence of inelastic WIMP scattering with a significance of more than 2$σ$. A profile-likelihood ratio analysis is used to set upper limits on the cross-section of WIMP-nucleus interactions. We exclude new parameter space for WIMPs heavier than 100 GeV/c${}^2$, with the strongest upper limit of $3.3 \times 10^{-39}$ cm${}^2$ for 130 GeV/c${}^2$ WIMPs at 90\% confidence level.