The axion-baryon coupling in SU(3) heavy baryon chiral perturbation theory
High Energy Physics - Phenomenology
2021-08-09 v3 High Energy Physics - Lattice
High Energy Physics - Theory
Nuclear Theory
Abstract
In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon chiral perturbation theory with SU(3) flavor symmetry and derive the axion coupling to the full SU(3) baryon octet, showing that the axion also significantly couples to hyperons. As studies on dense nuclear matter suggest the possible existence of hyperons in stellar objects such as neutron stars, our results should have phenomenological implications related to the so-called axion window.
Keywords
Cite
@article{arxiv.2104.10413,
title = {The axion-baryon coupling in SU(3) heavy baryon chiral perturbation theory},
author = {Thomas Vonk and Feng-Kun Guo and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:2104.10413},
year = {2021}
}
Comments
45 pages, 1 figure