BBN and Lambda_QCD

  title={BBN and Lambda\_QCD},
  author={James P. Kneller and Gail C. McLaughlin},
Big Bang Nucleosynthesis (BBN) has increasingly become the tool of choice for investigating the permitted variation of fundamental constants during the earliest epochs of the Universe. Here we present a BBN calculation that has been modified to permit changes in the QCD scale, Lambda_QCD. The primary effects of changing the QCD scale upon BBN are through the deuteron binding energy, B_D, and the neutron-proton mass difference, delta-m_np, which both play crucial roles in determining the… 
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J C A P 0 8 ( 2 0 2 1 ) 0 5 7 ournal of C osmology and A stroparticle P hysics
  • 2021