A Universal Bound on QCD Axions from Supernovae
High Energy Physics - Phenomenology
2025-09-15 v2 High Energy Astrophysical Phenomena
Nuclear Theory
Abstract
We identify a new production channel for QCD axions in supernova environments that contributes to axion emissivity for all models solving the strong CP problem. This channel arises at tree-level from a shift-symmetry-breaking operator constructed at next-to-leading order in Chiral Perturbation Theory. In scenarios where model-dependent derivative couplings to nucleons are absent, this sets the strongest model-independent constraint on the axion mass, improving on existing bounds by two orders of magnitude.
Cite
@article{arxiv.2410.19902,
title = {A Universal Bound on QCD Axions from Supernovae},
author = {Konstantin Springmann and Michael Stadlbauer and Stefan Stelzl and Andreas Weiler},
journal= {arXiv preprint arXiv:2410.19902},
year = {2025}
}
Comments
7 pages, 9 figures