$\mathcal{N}=5$ SCFTs and quaternionic reflection groups

Abstract: It was previously noted that for 3d SCFTs with $\mathcal{N}\geq 6$ the moduli space has the form of $\mathbb{C}^{4r}/\Gamma$, where $\Gamma$ is a complex reflection group, at least following suitable gauging of finite symmetries. Here we argue that this observation can be extended also to 3d SCFTs with $\mathcal{N}\geq 5$ SUSY, where $\Gamma$ is now a quaternionic reflection group. To do this, we study the moduli space of the known 3d $\mathcal{N}=5$ SCFTs. For Lagrangian cases, the results for the moduli space are further checked using the superconformal index.