| Speaker: | Manton Tucker Daniel (Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences) |
|---|---|
| Title: | Beyond general relativity: gravitational waves in non-minimally coupled theories |
| Date (JST): | Thu, Dec 11, 2025, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: |
Non-minimal couplings modify solutions in general relativity (GR), and therefore can be probed in various astrophysical systems. The modifications are either parity even or parity odd, and are easily seen in the equations of motion for gravitational wave (GW) strains written in the helicity basis. Motivated by the possibility that dark matter non-minimally couples to gravity, we can use this setting to ask, is the universe left-handed? What types of operators produce parity violation, and can it be appreciable enough to be observed in GW data? In this talk, we will explore these questions, beginning with a brief overview of the detection prospects of such effects. We will then describe our model independent parameterization of beyond GR modifications to the GW equations of motion, and write down the general solution as a function of redshift, assuming slowly varying matter fields. We will finally consider three specific models and their mapping to our parameterization, and numerically illustrate their affect on GWs emitted during the inspiral phase of a black hole - black hole merger. |
