An effective formalism for testing extensions to General Relativity with gravitational waves
An effective formalism for testing extensions to General Relativity with gravitational waves
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DOI：
10.1007/jhep09(2017)122
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发表时间：
2017-04
影响因子：
5.4
通讯作者：
S. Endlich;V. Gorbenko;Junwu Huang;L. Senatore
中科院分区：
文献类型：
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作者：
S. Endlich;V. Gorbenko;Junwu Huang;L. Senatore
最近对合并黑洞引力波（GW）的直接观测，为在前所未有的水平上探索强区域的引力理论提供了可能性。因此，探索可以检测到广义相对论（GR）的哪些扩展是有趣的。我们构造了满足以下要求的有效场论（EFT）。它可以用GW观测来检验;它与其他实验一致，包括GR的短距离测试;它符合广泛接受的物理学原理，如局部性，因果性和幺正性;它不涉及新的光自由度。满足这些要求的最一般理论对应于添加由Riemann张量的幂构造的GR拉格朗日算子，并通过与观察到的合并二进制的曲率相当的尺度进行抑制。这些算子的存在改变了致密物体之间的引力势，以及它们的有效质量和电流四极子，最终校正了发射的GW的波形。
The recent direct observation of gravitational waves (GW) from merging black holes opens up the possibility of exploring the theory of gravity in the strong regime at an unprecedented level. It is therefore interesting to explore which extensions to General Relativity (GR) could be detected. We construct an Effective Field Theory (EFT) satisfying the following requirements. It is testable with GW observations; it is consistent with other experiments, including short distance tests of GR; it agrees with widely accepted principles of physics, such as locality, causality and unitarity; and it does not involve new light degrees of freedom. The most general theory satisfying these requirements corresponds to adding to the GR Lagrangian operators constructed out of powers of the Riemann tensor, suppressed by a scale comparable to the curvature of the observed merging binaries. The presence of these operators modifies the gravitational potential between the compact objects, as well as their effective mass and current quadrupoles, ultimately correcting the waveform of the emitted GW.