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Temperature Dependence of the Neutron Lifespan
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Temperature Dependence of the Neutron Lifespan
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Current precision big bang nucleosynthesis (BBN) studies motivate us to revisit the neutron lifespan in the plasma medium of the early universe. The mechanism we explore is the Fermi-blocking of decay electrons and neutrinos by plasma. As result, neutrons live longer and we find a significant 6.4\% modification of neutron abundance in the BBN era arising from in plasma modification of the neutron lifetime. This effect can influence the final abundances of the light elements in BBN.
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Cited by 1 Pith paper
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Weinberg Angle, Neutron Abundance in BBN, and Lifetime
Small shifts in the Weinberg angle change the effective Fermi constant enough to visibly alter the neutron abundance at BBN onset and the neutron lifetime in the early-Universe plasma.
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