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Neutron Lifetime Anomaly and Big Bang Nucleosynthesis
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Neutron Lifetime Anomaly and Big Bang Nucleosynthesis
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We calculate the Big Bang Nucleosynthesis abundances for helium-4 and deuterium for a range of neutron lifetimes, $\tau_n = 840 - 1050$ s, using the state-of-the-art Python package \textsc{PRyMordial}. We show the results for two different nuclear reaction rates, calculated by NACRE II [1] and the PRIMAT [2] collaborations.
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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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