New paper “New Bounds on Heavy QCD Axions from Big Bang Nucleosynthesis” [arXiv:2510.23695]

Published a new paper with FSU theory colleagues: Prof. Taehyun Jung (Institue 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 signifcant advances in various directions.

1. Using BBN, derive new bounds on Heavy QCD Axions that are heaviers than 300MeV .
2. Include overlooked effects: fast neutral kaons, secandary hadrons, and new/updated cross sections.
3. Obtain semi-analytic solution for the BBN bound.