论文标题
Xenon电子后坐力检测的非弹性暗物质的EFT方法
EFT Approach of Inelastic Dark Matter for Xenon Electron Recoil Detection
论文作者
论文摘要
通过电子后坐力测量暗物质（DM）信号为直接检测光DM颗粒提供了重要手段。最近的Xenon1t异常在$ \，e_r^{} \！= \！（2-3）$ keV左右的Xenon1t异常可以通过DM非弹性散射自然解释，从而将能量注入后退电子，并在后退谱中给出狭窄的峰结构。我们提出了一种有效的场理论（EFT）方法，用于用于Xenon电子后坐力检测的放热非弹性DM信号。对于相对较重的调解人，我们通过有效的接触操作员与两个DM字段$（x，x，\，x'）$和两个leptons合理地制定了DM-Lepton交互。使用Xenon1t数据，我们符合电子后坐力频谱，并将允许的标量DM质量分解为$ \，2.1 \，\ \ text {kev} \！<\！<\！Δm\！δm\！<\！<\！3.3 3.3 3.3 \！3.3 \，\ text Text {kev} $（95％c.l。） 2.8 $ kev。我们分析了这种有效的DM电子接触相互作用产生的遗物丰度。为了提供DM遗物丰度和Xenon1t过量，我们对DM质量和DM有效相互作用的UV截止量表产生了新的约束。最后，我们研究有效的DM-Lepton接触相互作用的紫外线完成。
Measuring dark matter (DM) signals via electron recoil provides an important means for direct detection of light DM particles. The recent XENON1T anomaly with electron recoil energy around $\,E_R^{}\!=\!(2-3)$keV can be naturally explained by DM inelastic scattering which injects energy to the recoiled electrons and gives a narrow peak structure in the recoil spectrum. We present an effective field theory (EFT) approach to exothermic inelastic DM signals for the Xenon electron recoil detection. For relatively heavy mediator, we fairly formulate the DM-lepton interactions by effective contact operators with two DM fields $(X,\,X')$ and two leptons. Using the XENON1T data, we fit the electron recoil spectrum and constrain the allowed scalar DM mass-splitting as $\,2.1\,\text{keV}\!<\!Δm\!<\!3.3\,\text{keV}$ (95%C.L.), with the best fit $\,Δm \!=\! 2.8$keV. We analyze the relic abundance produced by such effective DM-electron contact interaction. To provide both the DM relic abundance and the XENON1T excess, we derive new constraints on the DM mass and the UV cutoff scale of DM effective interactions. Finally, we study possible UV completions for the effective DM-lepton contact interactions.
