论文标题
隐藏的子GEV玻色子对$（g-2）_ $，$^8 $ be-$^4 $ he异常，质子电荷半径，fermions和Dark Axion Portal
Implication of the hidden sub-GeV bosons for the $(g-2)_μ$, $^8$Be-$^4$He anomaly, proton charge radius, EDM of fermions and dark axion portal
论文作者
论文摘要
我们讨论了隐藏标量（$ s $），伪表（$ p $），矢量（$ v $）和轴向矢量（$ a $）颗粒与核子和lept子耦合的新物理学现象学，可以为Proton Charge Radius，$（g-2）_ $ $^8 $ - $^4 $^4 $^$^$^4 $^$^$^$^4 $^4 $^4 $^4 $^4 $^4 $^4 $^4 $^4 $^$^4 $^4颗粒。特别是，我们估计了Na64 $μ$实验的灵敏度，以观察到涉及隐藏标量和矢量颗粒的MUON缺失能量事件。该分析基于{\ tt geAnt4}蒙特卡洛模拟了muon散射目标核的信号过程$μn\ toμnS（v）$，然后是隐形玻色子衰减成暗（DM）颗粒，$ s（v）\ toχχ$。光sub-GEV玻色子的存在可能可以解释观察到的兆（G-2）$异常。我们还总结了Atomki $ x17上的现有界限（J^p = 0^ - ，1^\ pm）$ boson耦合与中子，质子和电子。我们实施这些限制，以估计$ p $，$ v $和$ a $颗粒对质子电荷半径的贡献，这是通过直接的1循环计算sachs形式的贡献。分析表明，相应的贡献可以忽略不计。我们还计算尺寸五操作员的深色轴心门户耦合的边界，这有助于瘦小和中子的EDM。
We discuss new physics phenomenology of hidden scalar ($S$), pseudoscalar ($P$), vector ($V$) and axial-vector ($A$) particles coupled to nucleons and leptons, which could give contributions to proton charge radius, $(g-2)_μ$, $^8$Be-$^4$He anomaly and electric dipole moment (EDM) of Standard Model (SM) particles. In particular, we estimate sensitivity of NA64$μ$ experiment to observe muon missing energy events involving hidden scalar and vector particles. That analysis is based on {\tt GEANT4} Monte Carlo simulation of the signal process of muon scattering off target nuclei $μN \to μN S(V)$ followed by invisible boson decay into Dark Matter (DM) particles, $S(V)\to χχ$. The existence of light sub-GeV bosons could possibly explain the muon $(g-2)$ anomaly observed. We also summarize existing bounds on ATOMKI $X17(J^P=0^-, 1^\pm)$ boson coupling with neutron, proton and electron. We implement these constraints to estimate the contribution of $P$, $V$ and $A$ particles to proton charge radius via direct 1-loop calculation of Sachs form factors. The analysis reveals the corresponding contribution is negligible. We also calculate bounds on dark axion portal couplings of dimension-five operators, which contribute to the EDMs of leptons and neutron.
