Scientists Are Using the Universe as a "Cosmological Collider"2017-22 | www.cfa.harvard.edu/
https://www.cfa.harvard.edu/news/2017-22
Physicists are capitalizing on a direct connection between the largest cosmic structures and
the smallest known objects to use the universe as a "cosmological collider" and investigate new physics.
The three-dimensional map of galaxies throughout the cosmos and the leftover radiation from the Big Bang –
called the cosmic microwave background (CMB) – are the largest structures in the universe that astrophysicists
observe using telescopes. Subatomic elementary particles, on the other hand, are the smallest known objects in
the universe that particle physicists study using particle colliders.
A team including Xingang Chen of the Harvard-Smithsonian Center for Astrophysics (CfA), Yi Wang from the Hong
Kong University of Science and Technology (HKUST) and Zhong-Zhi Xianyu from the Center for Mathematical Sciences
and Applications at Harvard University has used these extremes of size to probe fundamental physics in an
innovative way. They have shown how the properties of the elementary particles in the Standard Model of particle
physics may be inferred by studying the largest cosmic structures. This connection is made through a process
called cosmic inflation.