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Article overview
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Effect of Neutrino Heating on Primordial Nucleosynthesis | | B. Fields
; S. Dodelson
; M.S. Turner
; | | Date: |
31 Oct 1992 | | Journal: | Phys.Rev. D47 (1993) 4309-4314 | | Subject: | astro-ph hep-ph | | Affiliation: | U. Chicago/Fermilab | | Abstract: | We have modified the standard code for primordial nucleosynthesis to include the effect of the slight heating of neutrinos by $e^pm$ annihilations. There is a small, systematic change in the $^4$He yield, $Delta Y simeq +1.5 imes 10^{-4}$, which is insensitive to the value of the baryon-to-photon ratio $eta$ for $10^{-10}la eta la 10^{-9}$. We also find that the baryon-to-photon ratio decreases by about 0.5less than the canonical factor of 4/11 because some of the entropy in $e^pm$ pairs is transferred to neutrinos. These results are in accord with recent analytical estimates. | | Source: | arXiv, astro-ph/9210007 | | Services: | Forum | Review | PDF | Favorites | |
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