Effect of Finite Mass on Primordial Nucleosynthesis

Details Effect of Finite Mass on Primordial Nucleosynthesis Effect of Finite Mass on Primordial Nucleosynthesis

1997-03-11

arxiv.org/abs/astro-ph/9703065v1

Phys.Rev.D56:3191-3197,1997

Astronomy and Astrophysics

Astrophysics

15 pages, 8 figures, uses psfig.sty

Scientific paper

10.1103/PhysRevD.56.3191

We have calculated the small effect of finite nucleon mass on the weak-interaction rates that interconvert protons and neutrons in the early Universe. We have modified the standard code for primordial nucleosynthesis to include these corrections and find a small, systematic increase in the 4He yield, $\delta Y / Y \simeq (0.47 - 0.50)% $, depending slightly on the baryon-to-photon ratio. The fractional changes in the abundances of the other light elements are a few percent or less for interesting values of the baryon-to-photon ratio.

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