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by gus_massa
4026 days ago
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The Hydrogen-Helium ratio is very related to the details of the Big Bang. From http://hyperphysics.phy-astr.gsu.edu/hbase/astro/hydhel.html > Basically, the hydrogen-helium abundance helps us to model the expansion rate of the early universe. If it had been faster, there would be more neutrons and more helium. If it had been slower, more of the free neutrons would have decayed before the deuterium stability point and there would be less helium. |
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Isn't the inflation conceived to be as fast and long as necessary so that inputs to baryogenesis give result with hydrogen to helium ratios that are in line with experimental data?