论文标题
MUON $ G-2 $来自巨大的自旋2粒子异常
Muon $g-2$ Anomaly from a Massive Spin-2 Particle
论文作者
论文摘要
我们研究了用巨大的旋转2粒子（$ g $）解释MUON $ G-2 $异常的可能性，可以将其确定为广义randall-Sundrum模型中的第一个Kaluza-Klein Graditon。特别是，我们通过计算$ g $引起的相关单环Feynman图来获得对MUON $ G-2 $的领先捐款。该分析表达表明可以保持量子电动力学的规格不变性，并与预期的UV差异结构保持一致。此外，我们将LHC和LEP-II的扰动性和实验约束施加了理论界限。特别是，我们对与$ g $有关的非肾上腺功能运营商产生了新颖的扰动约束，这是可携带的可重新分析运营商的自然概括。结果，我们表明存在一个实质性的参数空间，可以容纳所有约束所允许的MUON $ G-2 $异常。最后，我们还对具有大量自旋2粒子的电子$ g-2 $异常的解释发表了评论。
We investigate the possibility to interpret the muon $g-2$ anomaly in terms of a massive spin-2 particle, $G$, which can be identified as the first Kaluza-Klein graviton in the generalized Randall-Sundrum model. In particular, we obtain the leading-order contributions to the muon $g-2$ by calculating the relevant one-loop Feynman diagrams induced by $G$. The analytic expression is shown to keep the gauge invariance of the quantum electrodynamics and to be consistent with the expected UV divergence structure. Moreover, we impose the theoretical bounds from the perturbativity and the experimental constraints from LHC and LEP-II on our model. Especially, we derive novel perturbativity constraints on nonrenormalizable operators related to $G$, which are the natural generalization of the counterpart for the renormalizable operators. As a result, we show that there exists a substantial parameter space, which can accommodate the muon $g-2$ anomaly allowed by all constraints. Finally, we also make comments on the possible explanation of the electron $g-2$ anomalies with the massive spin-2 particle.
