论文标题
搜索第三次观测高级Ligo-Virgo的引力波的双折射
Search for the birefringence of gravitational waves with the third observing run of Advanced LIGO-Virgo
论文作者
论文摘要
当CPT对称性被打破时，引力波从遥远的来源传播到地球时会产生双折射。如果足够大，则可以通过高级LIGO，处女座和Kagra探测器网络来测量这种双折射。在这项工作中，我们对重力波的双折射进行了约束，该网络的第三个观测运行，即两个目录GWTC-2和GWTC-3。对于分散关系$ω^{2} = k^{2} \pm2ζk^{3} $，我们的分析显示了对CPT-violating参数的最新严格限制，即。 \ textColor {black} {{$ζ= 4.07^{+5.91} _ { - 5.79} \ times10^{ - 17} \ mathrm {m} $}}}，$ 68 \％$ pusitive Level。该限制比现有一个{（$ \ sim 2 \ sim 2 \ times10^{ - 16} $ m）}更严格，并代表重力波中CPT对称性的第一个$ \ sim $ \ sim $ \ sim $ \ sim $ \ sim。贝叶斯因素的结果极大地不利于重力波的双折情景。
Gravitational waves would attain birefringence during their propagation from distant sources to the Earth, when the CPT symmetry is broken. If it was sizeable enough, such birefringence could be measured by the Advanced LIGO, Virgo and KAGRA detector network. In this work, we place constraints on the birefringence of gravitational waves with the third observing run of this network, i.e. two catalogues GWTC-2 and GWTC-3. For the dispersion relation $ω^{2}=k^{2}\pm2ζk^{3}$, our analysis shows the up-to-date strictest limit on the CPT-violating parameter, i.e. \textcolor{black}{{$ζ=4.07^{+5.91}_{-5.79}\times10^{-17}\mathrm{m}$}}, at $68\%$ confidence level. This limit is stricter by $\sim$5 times than the existing one {($\sim 2\times10^{-16}$m)} and stands for the first $\sim$10GeV-scale test of the CPT symmetry in gravitational waves. The results of Bayes factor strongly disfavor the birefringence scenario of gravitational waves.
