标题： 基于GWTC-1事件的宇称破坏引力参数化检验 显示英文标题

标题： Parametrized test of parity-violating gravity using GWTC-1 events

摘要： 宇称破坏（PV）引力最近在多个方面引起了关注。其中一个方面是轴子-引力子耦合，以检验轴子-暗物质模型。此外，通过将陈-西蒙斯（CS）引力扩展到包含标量场的二阶导数，提出了一种更一般的PV引力理论，我们称之为CNCL模型~[M. Crisostomi{\it 等}, Phys. Rev. D,{\bf 97}, 044034 (2018)]。该模型可以通过包含更高阶的标量场导数和/或更高曲率项进一步扩展。在本文中，我们通过引入一种与模型无关的修改参数化方法，讨论了引力部分宇称破坏对双星并合产生的引力波传播的影响。我们的参数化方法包括CNCL模型以及CS引力。当源双星相对于我们的视线方向为边缘朝向时，宇称破坏对引力波形的影响最大，而当源为正面朝向时，修改后的波形会退化为宇称对称的情况。我们使用LIGO/Virgo O1/O2目录进行此类修改特征的搜索。我们发现目录数据与广义相对论一致，并首次对各种后牛顿阶修正下的引力宇称破坏获得了约束。获得的对CS引力的约束与之前的研究结果一致。另一方面，我们获得的对CNCL模型的约束比之前的结果紧约7个数量级。 显示英文摘要

摘要： Parity-violating (PV) gravity has recently attracted interest in several aspects. One of them is the axion-graviton coupling to test the axion-dark matter model. Moreover, by extending Chern-Simons (CS) gravity to include derivatives of a scalar field up to the second order, a more general class of PV gravity theory, which we call the CNCL model, has been proposed~[M. Crisostomi {\it et al.}, Phys. Rev. D, {\bf 97}, 044034 (2018)]. The model can be further extended by including even higher derivatives of the scalar field and/or higher curvature terms. In this paper, we discuss the effect of parity violation in the gravitational sector on the propagation of gravitational waves from binary coalescence by introducing a model-independent parametrization of modification. Our parametrization includes the CNCL model as well as CS gravity. The effect of parity violation on the gravitational waveform is maximum when the source binary orientation to our line of sight is edge-on, while the modified waveform reduces to the parity-symmetric one when the source is face-on. We perform a search for the signature of such modification by using the LIGO/Virgo O1/O2 catalog. We find that the catalog data is consistent with general relativity and obtain constraints on parity violation in gravity for various post-Newtonian order modifications for the first time. The obtained constraint on CS gravity is consistent with the results in previous works. On the other hand, the constraint on the CNCL model that we obtain is tighter than the previous results by roughly 7 orders of magnitude.