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| Equilibrium Abundances in the |
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| Early
Universe |
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| • | Primary
success of the Big Bang model |
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| is that it
accounts for the abundances |
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| of the light
elements by primordial |
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| nucleosynthesis
in the first 10 minutes |
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| of the
universe. Detailed comparison |
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| of abundances
with observations |
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| provides an
excellent constraint on the |
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| baryon
fraction. This is a
crucially |
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| fundamental
topic. |
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