论文标题
用Na64e，LDMX，Na64 $μ$和m $ $^3 $探测隐藏的Spin-2暗物质介质
Probing hidden spin-2 mediator of dark matter with NA64e, LDMX, NA64$μ$ and M$^3$
论文作者
论文摘要
标准模型（SM）颗粒与暗物质（DM）之间的连接可以通过隐藏的Spin-2大型介体引入。在本文中，我们考虑了SM和DM颗粒带电的Lepton扇区之间的简化基准连接，这些连接被认为是来自黑暗扇区的隐藏的Dirac fermions。关于耦合的耦合是通过涉及SPIN-2介体场以及SM和DM扇区的能量弹药张量的尺寸-5算子建立的。我们详细研究了这种情况对Lepton固定目标设施的含义，例如Na64 $ E $，LDMX，Na64 $μ$和M $^3 $。特别是，对于特定的实验，我们详细讨论了Spin-2玻色子产生的缺失能量特征，然后将其无形衰变成稳定的DM对。此外，我们得出了这些实验的预期范围，用于累积在目标上的卵子的预计统计数据。我们还讨论了核和原子形式因子参数化对隐藏旋转的差异光谱的含义-2 $ boson排放，其生产的总横截面以及固定固定目标设施的实验覆盖范围，以探测隐藏的旋转旋转旋转型$ 2 $ DM Mediator。
The connection between Standard Model (SM) particles and dark matter (DM) can be introduced via hidden spin-2 massive mediator. In the present paper we consider the simplified benchmark link between charged lepton sector of SM and DM particles which are considered to be a hidden Dirac fermions from the dark sector. The regarding couplings are established through the dimension-5 operators involving spin-2 mediator field and the energy-momentum tensors of both SM and DM sectors. We study in detail the implication of this scenario for the lepton fixed-target facilities, such as NA64$e$, LDMX, NA64$μ$ and M$^3$. In particular, for the specific experiment we discuss in detail the missing-energy signatures of spin-2 boson production followed by its invisible decay into stable DM pairs. Moreover, we derive the expected reaches of these experiments for the projected statistics of the leptons accumulated on the target. We also discuss the implication of both nuclear and atomic form-factor parametrizations for the differential spectra of hidden spin-$2$ boson emission, the total cross-section of its production and the experimental reach of the fixed-fixed target facilities for probing hidden spin-$2$ DM mediator.
