论文标题
从衰减实验中对光嗜血液暗物质介体的限制
Constraints on Light Leptophilic Dark Matter Mediators from Decay Experiments
论文作者
论文摘要
我们研究了在现有实验中研究嗜血素暗物质相互作用对muons和基态介子的衰减的影响。我们考虑一个僻静的黑暗扇区，仅通过（瘦素）标量或矢量介体与瘦素相互作用。因此，这些相互作用将影响缓慢的衰变并变形能光谱。我们首先研究了穆斯的米歇尔衰变，$μ^+\ rightarrow e^+v+ν_e\barν_μ$，这使我们能够很好地限制参数空间。其次，将考虑稀有$π^\ pm $，$ k^\ pm $，$ d^\ pm $和$ d_s^\ pm $ pm $衰减到$eν$。标量介质将删除标准模型螺旋性抑制，以便可以得出强大的约束。光介导子与电子和muons的耦合的界限仍然比在低 - 能量 - 能量$ e^+e^ - $ colliders和MUON的磁矩的搜索中弱一些。最后，我们表明Kaon和Pion衰减基本上排除了标量暗物质粒子具有尺寸 - 5耦合到电子的“ co-simp”场景。
We study the influence of leptophilic dark matter interactions on decays of muons and ground state mesons in existing experiments. We consider a secluded dark sector exclusively interacting with leptons via either a (leptophilic) scalar or vector mediator. These interactions will therefore influence leptonic decays and deform the energy spectra. We first study the Michel decay of muons, $μ^+\rightarrow e^+ν_e \barν_μ$, which allow us to constrain the parameter space reasonably well. Secondly, the rare $π^\pm$, $K^\pm$, $D^\pm$ and $D_s^\pm$ decays to $eν$ will be considered. Scalar mediators would remove the Standard Model helicity suppression, so that strong constraints can be derived. The resulting bounds on the couplings of the light mediators to electrons and muons still turn out to be somewhat weaker than those from searches at low--energy $e^+e^-$ colliders and the magnetic moment of the muon, respectively. Finally, we show that kaon and pion decays basically exclude a ''Co--SIMP'' scenario where a scalar dark matter particle has a dimension--5 coupling to electrons.
