About
Through the concordance model of cosmology, it is possible to predict the primordial abundances of light elements within the framework of Big Bang Nucleosynthesis (BBN). These predictions agree remarkably well with observations of the primordial abundances of helium-4 and deuterium. Specifically, the deuterium abundance is strongly sensitive to nuclear reaction rates, such as $\text{D}+\text{D}\rightarrow\, ^3\text{He}+n$ or $\text{D}+\text{D}\rightarrow\text{T}+p$. By understanding in what energy ranges more precise measurements of these rates are needed, we hope to improve our knowledge of these rates to allow stronger cosmological inferences to be made from deuterium observations. These in turn allow us to make important improvements in estimating cosmological parameters such as $N_\text{eff}$, the effective number of neutrino species..
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The talk
Credits and licence
- Institution
- CERN
- Department
- Summer Student Lecture Programme General
- Speaker
- Fatih Zgalj
- Year
- 2025
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed