Supertranslation-Invariant Formula for the Angular Momentum Flux in Gravitational Scattering

被引：19

作者：

Javadinezhad, Reza ^{[1
]}

Porrati, Massimo ^{[1
]}

机构：

[1] NYU, Ctr Cosmol & Particle Phys, Dept Phys, 726 Broadway, New York, NY 10003 USA

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 01期

关键词：

GENERAL RELATIVITY; WAVES;

D O I：

10.1103/PhysRevLett.130.011401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 wavelength 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 Letter, 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.

引用

页数：5

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