Results from a Search for Dark Matter in the Complete LUX Exposure
Results from a Search for Dark Matter in the Complete LUX Exposure
复制标题
DOI：
10.1103/physrevlett.118.021303
复制
发表时间：
2017-01-11
影响因子：
8.6
通讯作者：
Zhang, C.
中科院分区：
文献类型：
--
作者：
Akerib, D. S.;Alsum, S.;Zhang, C.
我们报告了使用3.35 x 10(4) kg日暴露的大型地下氙（LUX）实验对自旋独立弱相互作用大质量粒子(WIMP)-核子散射的约束。位于美国南达科他州Lead的Sanford地下研究设施运行了一个活性质量为250 kg的双相氙气时间投影室。与我们之前的结果相比，高质量WIMP的灵敏度提高了大约四倍，这次搜索没有发现WIMP核反冲的证据。在WIMP质量为50 GeV c（-2）时，在90%的置信水平下，WIMP-核子自旋无关截面大于2.2 x 10-46 cm(2)被排除在外。当与先前报道的LUX暴露相结合时，在50 GeV c（-2）下，这种排斥增强到1.1 x 10(-46) cm(2)。
We report constraints on spin-independent weakly interacting massive particle (WIMP)-nucleon scattering using a 3.35 x 10(4) kg day exposure of the Large Underground Xenon (LUX) experiment. A dual-phase xenon time projection chamber with 250 kg of active mass is operated at the Sanford Underground Research Facility under Lead, South Dakota (USA). With roughly fourfold improvement in sensitivity for high WIMP masses relative to our previous results, this search yields no evidence of WIMP nuclear recoils. At a WIMP mass of 50 GeV c(-2), WIMP-nucleon spin-independent cross sections above 2.2 x 10-46 cm(2) are excluded at the 90% confidence level. When combined with the previously reported LUX exposure, this exclusion strengthens to 1.1 x 10(-46) cm(2) at 50 GeV c(-2).