论文标题
重力散射中角动量通量的超倾斜不变公式
A Supertranslation-Invariant Formula for the Angular Momentum Flux in Gravitational Scattering
论文作者
论文摘要
可以通过执行渐近度量的超倾斜来改变重力散射中辐射的角动量，即通过将无限的wavelenght添加到度量标准中。可以通过在总体相对性中对角动量通量进行超横流不变的定义来避免这种令人困惑的特性。文献中当前可用的定义无法重现获得重力散射中正确的辐射反应效应所需的通量。他们还不同意使用散射幅度和软重力定理进行的通量计算。在本文中，我们为重力散射中的角动量通量提供了一种新的超跨性变量定义，该定义仅使用渐近度量数据，并重现获得正确的辐射反应效应所需的通量。
The angular momentum radiated in gravitational scattering can be changed by performing a supertranslation of the asymptotic metric, i.e. by adding radiation with infinite wavelenght to the metric. This puzzling property can be avoided by adopting a supertranslation-invariant definition of the angular momentum flux in general relativity. Definitions currently available in the literature cannot reproduce the flux necessary to obtain the correct radiation reaction effects in gravitational scattering. They also disagree with computations of the flux performed using scattering amplitudes and soft graviton theorems. In this paper we provide a new supertranslation-invariant definition of the angular momentum flux in gravitational scattering that uses only asymptotic metric data and reproduces the flux necessary to obtain the correct radiation reaction effects.
