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Primordial Nucleosynthesis and Finite Temperature QED

Abundances of light nuclei formed during primordial nucleosynthesis are predicted by Standard Big Bang Model. The latest data from WMAP, with precision's higher than ever before, provides a motivation to determine theoretical higher order corrections to change in helium abundance and the related parameters. Here we evaluate the QED corrections to the change in these parameters during primordial nucleosynthesis using finite temperature effects at the two loop level. Relative variations in neutron decay rate, total energy density of the universe, relative change in neutrino temperature etc., with two loop corrections to electron mass, at the timescale when QED corrections were relevant, have been estimated.

preprint2013arXivOpen access
Mahnaz Q. haseebObaidullah JanOmair Sarfaraz
astro-ph.CO
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Open access3 authors1 topic
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Mahnaz Q. haseebObaidullah JanOmair Sarfaraz

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