PIRSA:22100144 Scientific Series Particle Physics

DOI10.48660/22100144

Series: Particle Physics

Valli, M. (2022). BBN circa 2022: New Physics hints from the Early Universe?. Perimeter Institute. https://pirsa.org/22100144

Valli, Mauro. BBN circa 2022: New Physics hints from the Early Universe?. Perimeter Institute, Oct. 28, 2022, https://pirsa.org/22100144 

@misc{ pirsa_PIRSA:22100144,
  doi = {10.48660/22100144},
  url = {https://pirsa.org/22100144},
  author = {Valli, Mauro},
  keywords = {Particle Physics},
  language = {en},
  title = {BBN circa 2022: New Physics hints from the Early Universe?},
  publisher = {Perimeter Institute},
  year = {2022},
  month = {oct},
  note = {PIRSA:22100144 see, \url{https://pirsa.org}}
}

Abstract

Bang Nucleosynthesis (BBN) is one of the greatest outcome of the Standard Model of Particle Physics when put next to ΛCDM cosmology. In this talk, I will first review the key aspects of standard BBN and illustrate a new code -- PRyMordial -- to make state-of-the-art predictions of primordial light-element abundances within and beyond the Standard Model. I will then highlight the latest measurements regarding the primordial abundance of helium-4 and deuterium, and present evidence at the 2 sigma level for a nonzero lepton asymmetry from BBN data jointly with the Cosmic Microwave Background. I will leave some final comments on how a large total lepton asymmetry can be consistently realized in the Early Universe.

Zoom Link: https://pitp.zoom.us/j/95011247645?pwd=S0EwZG9nSHQvTjV0QjBxeHNUWWtmUT09

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