论文标题
在梅尔尼科夫 - 瓦恩什素体制中，限制逐灯的限制
Constraints on the hadronic light-by-light in the Melnikov-Vainshtein regime
论文作者
论文摘要
由于实验测量值与理论标准模型预测之间可能的张力，MUON异常磁矩继续引起人们的注意。为了减少对磁矩的逐光贡献的不确定性，我们在Melnikov-Vainshtein机制中得出了短途限制，这对于数据驱动的确定很有用。在这个运动区域中，四个电磁电流中的两条在定义Hadronic灯光照明张量的四点函数中接近。为了获得约束，我们开发了有关张量的系统运算符产品扩展，以便在运算符的扩展中向临近领先的顺序扩展。我们在$α_s$贡献中评估领导者的贡献，并为近距离行为的运算符提供了约束，这些操作员也是有效的。
The muon anomalous magnetic moment continues to attract attention due to the possible tension between the experimentally measured value and the theoretical Standard Model prediction. With the aim to reduce the uncertainty on the hadronic light-by-light contribution to the magnetic moment, we derive short-distance constraints in the Melnikov-Vainshtein regime which are useful for data-driven determinations. In this kinematical region, two of the four electromagnetic currents are close in the four-point function defining the hadronic light-by-light tensor. To obtain the constraints, we develop a systematic operator product expansion of the tensor in question to next-to-leading order in the expansion in operators. We evaluate the leading in $α_s$ contributions and derive constraints for the next-to-leading operators that are also valid nonperturbatively.
