θ-dependence of light nuclei and nucleosynthesis

Dean Lee, Ulf G. Meißner, Keith A. Olive, Mikhail Shifman, Thomas Vonk

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We investigate the impact of the QCD vacuum at nonzero θ on the properties of light nuclei, Big Bang nucleosynthesis, and stellar nucleosynthesis. Our analysis starts with a calculation of the θ-dependence of the neutron-proton mass difference and neutron decay using chiral perturbation theory. We then discuss the θ-dependence of the nucleon-nucleon interaction using a one-boson-exchange model and compute the properties of the two-nucleon system. Using the universal properties of four-component fermions at large scattering length, we then deduce the binding energies of the three-nucleon and four-nucleon systems. Based on these results, we discuss the implications for primordial abundances of light nuclei, the production of nuclei in stellar environments, and implications for an anthropic view of the universe.

Original languageEnglish (US)
Article number033392
JournalPhysical Review Research
Volume2
Issue number3
DOIs
StatePublished - Sep 2020

Bibliographical note

Publisher Copyright:
© 2020 authors. Published by the American Physical Society.

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