Neutron Lifetime Anomaly and Big Bang Nucleosynthesis
Tammi Chowdhury, Seyda Ipek
TL;DR
This paper investigates how variations in neutron lifetime affect primordial helium-4 and deuterium abundances during Big Bang Nucleosynthesis, using advanced computational models and different nuclear reaction rates.
Contribution
It provides updated BBN abundance calculations across a range of neutron lifetimes using the latest reaction rate data and a modern Python package.
Findings
Neutron lifetime variations significantly impact helium-4 and deuterium yields.
Comparison of reaction rates shows differences in predicted abundances.
Results inform constraints on neutron lifetime from cosmological observations.
Abstract
We calculate the Big Bang Nucleosynthesis abundances for helium-4 and deuterium for a range of neutron lifetimes, 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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Taxonomy
TopicsAtomic and Subatomic Physics Research · Nuclear Physics and Applications · Quantum, superfluid, helium dynamics