PIRSA:22100144

BBN circa 2022: New Physics hints from the Early Universe?

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}}
          }

Mauro Valli National Institute for Nuclear Physics

DOI 10.48660/22100144
Collection
Talk Type Scientific Series
Subject

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