• Corpus ID: 6711089

Quantifying the Sensitivity of Big Bang Nucleosynthesis to Isospin Breaking

  title={Quantifying the Sensitivity of Big Bang Nucleosynthesis to Isospin Breaking},
  author={Matthew Heffernan and Projjwal Banerjee and Andr{\'e} Walker-Loud},
We perform the first quantitative study of the sensitivity of Big Bang Nucleosynthesis to variations in isospin breaking with precise input from lattice QCD calculations. The predicted light nuclear abundances are most sensitive to the neutron-proton mass splitting as both the initial relative abundance of neutrons to protons and the $n \rightleftharpoons p$ weak reaction rates are very sensitive to this quantity. Lattice QCD has been used to determine this mass splitting to greater than 5… 

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