Big Bang Nucleosynthesis - Post Planck

It will take place via Zoom at: https://infn-it.zoom.us/j/83324611205

Abstract

Big bang nucleosynthesis provides a window to the physics of the universe just seconds after the big bang. Its predictions of the light element abundances of D, 4He, and 7Li can be compared with observational determinations. Over the last several years, significant progress has been made in the determinations of deuterium and helium abundances and most importantly results from Planck measurements of the microwave background have provided precise values for the baryon density of the universe, a key input used in abundance predictions. Planck data is combined with BBN to test the consistency of the Standard Model. Recent nuclear cross section data and its effect on BBN precision is also discussed. These predictions are sensitive to the conditions when the temperature of the universe was ≈ MeV or ≈ 10^10 K. Using inputs from the standard model of cosmology and particle physics yields excellent agreement between theory and experiment. Thus deviations from the standard model such as the number of particle degrees of freedom (often parametrized as the number of neutrino flavors) can be tested.
 

Ample space for questions and discussion will be allocated at the end of the TH Colloquium.  We have also created an online Q&A space for each seminar. You can submit your question by filling the form. The answers will be published soon after.

For more info see  https://www.ggi.infn.it/seminars