新的LUX结果补偿了LHC对奇异夸克的搜索
New LUX result compensates LHC searches for exotic quarks
摘要：
重夸克和暗物质之间的压缩质谱是LHC研究的一个挑战。而在暗物质直接探测实验中，重夸克与暗物质之间的质量接近简并，可以增强暗物质与核之间的弹性散射截面。在本文中，我们用矢量暗物质来说明这种情况，使用LUX 2016的最新结果。对重夸克的质量限制可能比LHC目前的限制更严格，除非耦合强度非常小。然而，在允许的微小耦合强度下的压缩质量谱使得重夸克的衰变寿命比QCD强子化的时间尺度长。
英文摘要：
The scenario of the compressed mass spectrum between heavy quark and dark matter is a challenge for LHC searches. However, the elastic scattering cross section between dark matter and nuclei in dark matter direct detection experiments can be enhanced with nearly degenerate masses between heavy quarks and dark matter. In this paper, we illustrate such scenario with a vector dark matter, using the latest result from LUX 2016. The mass constraints on heavy quarks can be more stringent than current limits from LHC, unless the coupling strength is very small. However, the compress mass spectrum with allowed tiny coupling strength makes the decay lifetime of heavy quarks longer than the time scale of QCD hadronization.
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