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- W3097432907 abstract "A discovery of gravitational waves from binary black holes raises a possibility that measurements of them can provide strict tests of CPT invariance in gravitational waves. When CPT violation exists, if any, gravitational waves with different circular polarizations could gain a slight difference in propagating speeds. Hence, the birefringence of gravitational waves is induced and there should be a rotation of plus and cross modes. For CPT-violating dispersion relation ${omega^{2}=k^{2}}$ ${pm 2zeta k^{3}}$, where a sign ${pm}$ denotes different circular polarizations, we find no substantial deviations from CPT invariance in gravitational waves by analyzing a compilation of ten signals of binary black holes in the LIGO-Virgo catalog GWTC-1. We obtain a strict constraint on the CPT-violating parameter, i.e., $zeta=0.14^{+0.22}_{-0.31}times10^{-15}text{m}$, which is around two orders of magnitude better than the existing one. Therefore, this study stands for the up-to-date strictest tests of CPT invariance in gravitational waves." @default.
- W3097432907 created "2020-11-09" @default.
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- W3097432907 date "2020-11-01" @default.
- W3097432907 modified "2023-09-24" @default.
- W3097432907 title "Tests of CPT invariance in gravitational waves with LIGO-Virgo catalog GWTC-1" @default.
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- W3097432907 doi "https://doi.org/10.1140/epjc/s10052-020-08628-x" @default.
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