Light Dark Matter Anomalies After LUX
Light Dark Matter Anomalies After LUX
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DOI：
10.1103/physrevd.89.016017
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发表时间：
2013-11
影响因子：
5
通讯作者：
Moira I. Gresham;K. Zurek
中科院分区：
文献类型：
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作者：
Moira I. Gresham;K. Zurek
我们根据 XENON、CDMS、LUX、PICASSO 和 COUPP 的约束检查了 CoGeNT、DAMA 和 CDMS-Silicon 中光暗物质 (DM) 弹性散射的一致性。我们考虑了各种用于协调异常与约束的算子，包括阿纳极、磁偶极、动量相关和同位旋破坏 DM。我们发现，通过这些替代算子的弹性散射并没有显着减少信号与算子的零约束之间的张力，其中三个所谓信号中的至少两个映射到 DM 质量散射横截面中的公共空间。选择位于 Manzur 等人测量的 $-1 \sigma$ 区域的闪烁效率可以缓解信号和 LUX 约束之间的紧张关系，特别是对于磁偶极子相互作用和排外相互作用（尽管对于后者，信号区域基本上不重叠）。我们还发现光环模型的适度变化不会改变这个结果。我们的结论是，即使放宽关于弹性散射相互作用类型的假设并对闪烁效率采取保守选择，LUX 和其他无效实验的结果仍然与直接检测异常的光 DM 弹性散射解释存在矛盾。
We examine the consistency of light dark matter (DM) elastic scattering in CoGeNT, DAMA, and CDMS-Silicon in light of constraints from XENON, CDMS, LUX, PICASSO and COUPP. We consider a variety of operators that have been employed to reconcile anomalies with constraints, including anapole, magnetic dipole, momentum-dependent, and isospin-violating DM. We find that elastic scattering through these alternative operators does not substantially reduce the tension between the signals and the null constraints for operators where at least two of the three purported signals map onto a common space in the DM mass--scattering cross-section plane. Taking a choice of the scintillation efficiency that lies at the $-1 \sigma$ region of the Manzur et al measurement relieves tension between signals and the LUX constraint---in particular for a magnetic dipole interaction and a xenophobic interaction (though for the latter the signal regions do not substantially overlap). We also find that modest changes in the halo model does not alter this result. We conclude that, even relaxing the assumption about the type of elastic scattering interaction and taking a conservative choice for the scintillation efficiency, LUX and the results from other null experiments remain in tension with a light DM elastic scattering explanation of direct detection anomalies.