The $U$-plane of rank-one 4d $\mathcal{N}=2$ KK theories
The $U$-plane of rank-one 4d $\mathcal{N}=2$ KK theories
The simplest non-trivial 5d superconformal field theories (SCFT) are the famous rank-one theories with $E_n$ flavour symmetry. We study their $U$-plane, which is the one-dimensional Coulomb branch of the theory on $\mathbb{R}^4 \times S^1$. The total space of the Seiberg-Witten (SW) geometry -- the $E_n$ SW curve fibered over the …