Graham tells us how Big Bang Nucleosynthesis (BBN) and the Cosmic Microwave Background can be used to constrain the potential existence of particles beyond the Standard Model.

The focus is on light dark matter (masses less than 1GeV), which escapes direct detection bounds by being too light to kick nucleons hard enough and is most interesting to cosmology because it has precisely the masses relevant in the early universe processes we can “observe”, e.g. BBN.

Graham volunteered to give this talk on less than 36 hours notice, so huge thanks to him for pulling something together so quickly!!

Speaker: Graham White https://www.triumf.ca/theory/graham-white

Graham’s paper: https://arxiv.org/abs/2003.02273