Anomalies and parities for quintessential and ultra-light axions
arXiv:2102.01795 · doi:10.1016/j.physletb.2021.136248
Abstract
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 GeV.
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