Speaker
Description
4D $\mathcal{N}=2$ SCFTs obtained from orbifolding $\mathcal{N}=4$ SYM and then performing a marginal deformation exhibit hidden symmetries. Namely, the orbifolding procedure breaks down some actions of the generators coming from $\mathcal{N}=4$. However, by employing a non-trivial co-product involving a (Drinfeld) twist, the actions of the broken generators can be ``restored'' as generators of a hidden symmetry. In my talk I will focus on the particular example of the R-symmetry group of the $\mathbb{Z}_2$ quiver theory $SU(N) \times SU(N)$ in order to demonstrate some novel features of such symmetries. In particular, the hidden symmetry exhibited by this model allows one to relate $\frac{1}{2}$-BPS states of the $\mathcal{N}=2$ SCFTs multiplets reminiscent of $\mathcal{N}=4$ SYM.
