论文标题
$^8 $中的异常是核过渡和$（g-2）_ {e，μ} $：迈向最小的合并解释
Anomalies in $^8$Be nuclear transitions and $(g-2)_{e,μ}$: towards a minimal combined explanation
论文作者
论文摘要
通过同时解释光Lepton异常的磁性偶极矩的同时解释明显的差异，以及$^8 $中的异常内部对创建是核过渡，我们探索了一个简单的新物理学模型，基于A $ U（1）_ u（1）_ _ _ {b-l-l} $的标准模型Groum的扩展。该模型进一步包括像较重的矢量般的费米昂字段，以及负责$ u（1）_ {b-l} $的低规模破裂的额外标量，这引起了轻度$ z^\ prime $ boson。新的字段和电流允许以$^8 $为单位解释异常的内部对创建，同时与各种实验约束保持一致。有趣的是，我们发现$ z^\ prime $和新的$ u（1）_ {b-l} $的贡献也可以成功地解释这两个$（g-2）_ {e，μ} $异常；对模型参数空间的强大现象学约束最终使$（g-2）_e $和以$^8 $的异常内对创建的综合解释是特别的预测性。这种最小的“原型模型”的基本思想可以很容易地纳入标准模型的其他Protophic $ U（1）$扩展中。
Motivated by a simultaneous explanation of the apparent discrepancies in the light charged lepton anomalous magnetic dipole moments, and the anomalous internal pair creation in $^8$Be nuclear transitions, we explore a simple New Physics model, based on an extension of the Standard Model gauge group by a $U(1)_{B-L}$. The model further includes heavy vector-like fermion fields, as well as an extra scalar responsible for the low-scale breaking of $U(1)_{B-L}$, which gives rise to a light $Z^\prime$ boson. The new fields and currents allow to explain the anomalous internal pair creation in $^8$Be while being consistent with various experimental constraints. Interestingly, we find that the contributions of the $Z^\prime$ and the new $U(1)_{B-L}$-breaking scalar can also successfully account for both $(g-2)_{e,μ}$ anomalies; the strong phenomenological constraints on the model's parameter space ultimately render the combined explanation of $(g-2)_e$ and the anomalous internal pair creation in $^8$Be particularly predictive. The underlying idea of this minimal "prototype model" can be readily incorporated into other protophobic $U(1)$ extensions of the Standard Model.
