Anomalies and parities for quintessential and ultra-light axions

Abstract

We discuss the energy scales of the explicit breaking terms of the global symmetries U(1)×globalSU(2)gauge2 needed for the quinessential axion (QA) and the ultra-light axion (ULA). The appropriate scale of QA is about 1.48×108GeV.

Keywords

• Quintessential axion
• Dark energy
• QCD axion
• SU(2) anomaly