Constraints on the Variation of the Fine Structure Constant from Big Bang Nucleosynthesis

  title={Constraints on the Variation of the Fine Structure Constant from Big Bang Nucleosynthesis},
  author={Lars Bergstr{\"o}m and S. Iguri and Hyam Rubinstein},
We put bounds on the variation of the value of the fine structure constant α, at the time of Big Bang nucleosynthesis. We study carefully all light elements up to 7Li. We correct a previous upper limit on |∆α/α| estimated from 4He primordial abundance and we find interesting new potential limits (depending on the value of the baryon-to-photon ratio) from 7Li, whose production is governed to a large extent by Coulomb barriers. The presently unclear observational situation concerning the… CONTINUE READING

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