Speaker
Description
In this talk, I will first try to discuss why the particle nature of dark matter is one of the most important topics of the modern physics from the historical development and frontier research of dark matter, and whether the evidence for dark matter reveals only gravitational interaction. Then, I will take one of the simplest dark matter models - mirror dark matter (the dark sector behaves like a mirror sector of the visible world) - as an example. We will first demonstrate that non-gravitational forces can not only solve cosmological problems, such as the Hubble and S8 tensions, but also use the weak gravitational lensing data from the future Chinese Space Station Telescope (CSST) to accurately determine the possible relic of mirror dark matter. Finally, we combine (i) gravitational lensing constraints, (ii) stochastic gravitational wave detection from pulsar timing arrays, and (iii) precise measurements of CMB+BAO to predict the possible degrees of freedom of relativistic particles.
