论文标题
大量量效应和振幅的结构
Large Gauge Effects and the Structure of Amplitudes
论文作者
论文摘要
我们表明，大型仪表转换改变了动量保护的结构，导致在引力波事件的简单玩具模型中，导致不变的三分幅度。这种现象可以解决扰动散射振幅计算与现场理论中精确方法之间的明显张力。一旦通过修改后的LSZ处方包括大量规格效应，张力将解决到扰动理论的所有顺序；如果省略它们，扰动方法仅在完整的非扰动表达中恢复术语的子集。尽管我们的结果是在特定示例的背景下得出的，但是我们工作的几个方面在动态重力散射过程中具有类似物。
We show that large gauge transformations modify the structure of momentum conservation leading to non-vanishing three-point amplitudes in a simple toy model of a gravitational wave event. This phenomenon resolves an apparent tension between perturbative scattering amplitude computations and exact methods in field theory. The tension is resolved to all orders of perturbation theory once large gauge effects are included via a modified LSZ prescription; if they are omitted, perturbative methods only recover a subset of terms in the full non-perturbative expression. Although our results are derived in the context of specific examples, several aspects of our work have analogues in dynamical gravitational scattering processes.
