On the Dynamical Origin of the ${\eta }^{\prime }$ Potential and the Axion Mass

Csaba Csáki, Raffaele Tito D'Agnolo, Rick S. Gupta +3

We investigate the dynamics responsible for generating the potential of the ${\eta }^{\prime }$, the (would-be) Goldstone boson associated with the anomalous axial $U(1)$ symmetry of QCD. The sta…