Dark Matter Results from 225 Live Days of XENON100 Data
Dark Matter Results from 225 Live Days of XENON100 Data
复制标题
XENON100 数据 225 天的暗物质结果
DOI：
10.1103/physrevlett.109.181301
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发表时间：
2012-11-02
影响因子：
8.6
通讯作者：
Weinheimer, C.
中科院分区：
文献类型：
--
作者：
Aprile, E.;Alfonsi, M.;Weinheimer, C.
我们报告了在2011年和2012年期间在Gran Sasso的Nazionali实验室进行了13个月的XENON 100实验。XENON 100的特点是在感兴趣的能量区域中具有（5.3 +/- 0.6）X 10（-3）事件/（keV（ee）X kg X天）的超低电磁背景。对224：6活日X 34 kg暴露量的盲态分析没有得出暗物质相互作用的证据。在6.6-30.5 keV（nr）的预定核反冲能量范围内观察到的两个候选事件与（1.0 +/- 0.2）事件的背景预期一致。利用6.6-43.3 keV（nr）能量范围的剖面似然分析，对质量大于8 GeV/c（2）的弱相互作用大质量粒子的自旋无关弹性弱相互作用大质量粒子-核子散射截面设定了最严格的极限，在55 GeV/c（2）和90%置信水平下，最小值为2 × 10（-45）cm（2）。
We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso for 13 months during 2011 and 2012. XENON100 features an ultralow electromagnetic background of (5.3 +/- 0.6) X 10(-3) events/(keV(ee) X kg X day) in the energy region of interest. A blind analysis of 224: 6 live days X 34 kg exposure has yielded no evidence for dark matter interactions. The two candidate events observed in the predefined nuclear recoil energy range of 6.6-30.5 keV(nr) are consistent with the background expectation of (1.0 +/- 0.2) events. A profile likelihood analysis using a 6.6-43.3 keV(nr) energy range sets the most stringent limit on the spin-independent elastic weakly interacting massive particle-nucleon scattering cross section for weakly interacting massive particle masses above 8 GeV/c(2), with a minimum of 2 X 10(-45) cm(2) at 55 GeV/c(2) and 90% confidence level.