Conveners
Session 5
- 颖理 章 (同济大学)
The polarized light of the cosmic microwave background is sensitive to new physics that violates parity symmetry. In this presentation, we present a tantalizing hint of parity violation from the polarization data of two satellite missions, WMAP and Planck, with a statistical significance of 3 sigma. This signal has also been observed in recent data from the Atacama Cosmology Telescope. Taken...
It is not easy to have a healthy parity violating gravity models within Riemannian geometry. The famous Chern-Simons modified general relativity and its extensions are pathological due to the ghost modes appeared at high energy scales. In this talk, I will introduce some parity violating models within the framework of teleparallel gravity, especially the Nieh-Yan modified teleparallel gravity...
In this presentation, I will talk about a framework for analysing gravitational waves in thermal environments, such as the radiation-dominant early universe, from a symmetry perspective. I will focus on the effective dynamics of gravitational waves in the interaction picture of quantum field theory and discuss the symmetry constraints on the theory.
