We discuss the energy scales of the explicit breaking terms of the global symmetries \USW~ needed for the quinessential axion (QA) and the ultra-light axion (ULA). The appropriate scale of QA is about 108 GeV.
@article{arxiv.2102.01795,
title = {Anomalies and parities for quintessential and ultra-light axions},
author = {Jihn E. Kim},
journal= {arXiv preprint arXiv:2102.01795},
year = {2021}
}