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New limits on the Lorentz/CPT symmetry through fifty gravitational-wave events
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abstract
Lorentz invariance plays a fundamental role in modern physics. However, tiny violations of the Lorentz invariance may arise in some candidate quantum gravity theories. Prominent signatures of the gravitational Lorentz invariance violation (gLIV) include anisotropy, dispersion, and birefringence in the dispersion relation of gravitational waves (GWs). Using a total of 50 GW events in the GW transient catalogs GWTC-1 and GWTC-2, we perform an analysis on the anisotropic birefringence phenomenon. The use of multiple events allows us to completely break the degeneracy among gLIV coefficients and globally constrain the coefficient space. Compared to previous results at mass dimensions 5 and 6 for the Lorentz-violating operators, we tighten the global limits of 34 coefficients by factors ranging from $2$ to $7$.
Forward citations
Cited by 2 Pith papers
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Constraints on parity and Lorentz violations from gravitational waves: a comparison between single-parameter and multi-parameter analysis
Multi-parameter and single-parameter gravitational-wave analyses yield comparable parity and Lorentz violation constraints for three models, but degeneracies weaken the multi-parameter result when two parameters modif...
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Constraining Lorentz and parity violations in gravity with multiband gravitational wave observations
Future multiband GW networks could tighten Lorentz- and parity-violation energy-scale bounds by up to several orders of magnitude, with massive binaries best for low-frequency and loud binaries for high-frequency effects.
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