Testing Lorentz Invariance of Gravity in the Standard Model Extension with GWTC-3

Understand

Successful detection of gravitational waves has presented a new avenue to explore the nature of gravity.

• With the cumulative catalog of detected events, we can perform tests on General Relativity from various aspects with increasing precision.
• In this work, we focus on Lorentz symmetry during propagation of gravitational waves.
• Considering the dispersion relation in the gauge-invariant linearized gravity sector of the Standard-Model Extension, the anisotropy, birefringence, and dispersion effects will be induced during propagation of gravitational waves because of the Lorentz violating modification, and cause dephasings in waveform received by detectors.