New paper “New Bounds on Heavy QCD Axions from Big Bang Nucleosynthesis” [arXiv:2510.23695]
Published:
Published a new paper with FSU theory colleagues: Prof. Taehyun Jung (Institute for Basic Science, South Korea), Prof. Takemichi Okui, and Jiabao Wang (my student).
[arXiv:2510.23695] Phys.Rev.D 113 (2026) 055002
In this paper, we establish the cutting edge calculation for Big Bang Nucleosynthesis with hadron injection. We made significant advances in various directions.
- Using BBN, derive new bounds on heavy QCD axions that are heavier than 300 MeV.
- Include overlooked effects: fast neutral kaons, secondary hadrons, and new/updated cross sections.
- Obtain semi-analytic solution for the BBN bound.