University of Waterloo
"Constraining the Dark Sector with BBN and CMB physics"
Abstract: Historic examples show that explorations of the "missing mass" and the "origin of mass" problems have led not only to the discoveries of new particles, such as neutron and most recently the Higgs boson, but also to the discoveries of new fundamental forces of nature: strong force and the Higgs-mediated Yukawa force. Currently there is a clear missing mass problem on the cosmic scale. Will the resolution of the dark matter problem lead to the discovery of new particles and new forces associated with it? In my talk I will show how recent advances in understanding the early moments of the Universe's existence, in particular Big Bang Nucleosynthesis and the Cosmic Microwave Background, create a new powerful tool in exploring the nature of dark matter, and new forces that might be associated with it. This leads to the concept of the Universe as an "active detector": it creates and detects new particles and force carriers.