论文标题
暗轴门户对fermions和暗物质的EDM的含义,用Na64 $ e $,Na64 $μ$,LDMX,$ \ mbox {M}^3 $和Babar
Implication of the dark axion portal for the EDM of fermions and dark matter probing with NA64$e$, NA64$μ$, LDMX, $\mbox{M}^3$, and BaBar
论文作者
论文摘要
普通标准模型(SM)光子与深色光子和轴(如粒子(ALP))之间的联系可以通过深色轴心门户耦合引入。鉴于深色轴心门户设置,在目前的论文中,我们将深色光子称为SM和暗物质(DM)颗粒之间的介体,这意味着它主要衰减成一对DM费米子。此外,我们详细讨论了深色轴心门户对Lepton(电子和MUON)固定目标实验的影响。特别是,对于特定的固定目标设施,我们研究了深色光子产生的缺失能量特征,然后将其无形的衰减成稳定的DM颗粒。我们研究了有关签名的探测深色轴向门户顶点的潜力,并得出了Na64 $ e $,Na64 $μ$,LDMX和$ \ mbox {M}^3 $的预期灵敏度。此外,我们估计了$ j/ψ$ vector Meson隐形衰减的预计统计数据中Na64 $ e $的预期覆盖率。我们还为特定的深色轴心门户场景重新铸造了Babar Monophoton边界。此外,我们通过在模型中包括强子和Lepton特异性ALP耦合来修改深色轴门户设置。结果,我们从固定目标实验中获得了ALP特异性耦合的组合。我们讨论了修改后的深色轴心门户场景对SM费米子的电偶极矩(EDM)的含义。此外,我们通过考虑中子异常的磁矩,从中子EDM的现有界限中得出了$ CP $竞争中子特异性ALP耦合的组合的新颖限制。
The link between ordinary Standard model (SM) photon and both dark photon and axion like particle (ALP) can be introduced through the dark axion portal coupling. Given the dark axion portal setup, in the present paper we refer the dark photon as the mediator between SM and dark matter (DM) particles, implying that it decays predominantly into pair of DM fermions. Furthermore, we discuss in detail the implication of the dark axion portal scenario for the lepton (electron and muon) fixed target experiments. In particular, for the specific fixed target facility we study the missing energy signatures of the dark photon production followed by its invisible decay into stable DM particles. We investigated the potential to probe dark axion portal vertices with regarding signatures and derive the expected sensitivities of NA64$e$, NA64$μ$, LDMX and $\mbox{M}^3$. Moreover, we estimated the expected reach of NA64$e$ from the projected statistics of the $J/ψ$ vector meson invisible decays. We also recasted BaBar monophoton bounds for the specific dark axion portal scenario. In addition, we modified the dark axion portal setup by including in the model both the hadron and lepton specific ALP couplings. As the result, we obtain the bounds on the combination of fermion-specific couplings of ALP from the fixed target experiments. We discuss the implication of the modified dark axion portal scenario for the electric dipole moments (EDM) of SM fermions. In addition, we derived the novel constraints on the combination of the $CP$-violating neutron-specific ALP couplings from the existing bounds on neutron EDM by taking into account the neutron anomalous magnetic moment.