- #1

Safinaz

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- TL;DR Summary
- Any help how to find the right value of the baryon asymmetry or the baryon density expected from the Big Bang Nucleosynthesis (BBN) of order ##\sim 10^{-10}## in a paper

I'm trying to understand from this paper

https://pdg.lbl.gov/2020/reviews/rpp2020-rev-bbang-nucleosynthesis.pdf

What is the value of the baryon to photon ratio ##\eta=n_b/n_\gamma## as named in figure 24.1, but I can't get from the figure or the paper how ##\eta## is of order ##10^{-10}##

Any help in reading such papers?

I mean I found in another study that the value of ##\eta## as expected from BBN is of order: ##6.07\pm0.33 \times 10^{-10} ##

So where can we find such value in the mentioned paper?

https://pdg.lbl.gov/2020/reviews/rpp2020-rev-bbang-nucleosynthesis.pdf

What is the value of the baryon to photon ratio ##\eta=n_b/n_\gamma## as named in figure 24.1, but I can't get from the figure or the paper how ##\eta## is of order ##10^{-10}##

Any help in reading such papers?

I mean I found in another study that the value of ##\eta## as expected from BBN is of order: ##6.07\pm0.33 \times 10^{-10} ##

So where can we find such value in the mentioned paper?