Description
I will discuss the construction of 6d (1,0) SCFTs from the perspective of the "atomic classification", focussing on an oft-overlooked subtlety whereby distinct SCFTs in fact share an effective description on the generic point of the tensor branch. We will see how to determine the difference in the Higgs branch operator spectrum from the atomic perspective, and how that agrees with a dual class S perspective. Next, I will discuss the global form of the flavor symmetry group for 6d (1,0) SCFTs, how that can be determined from the tensor branch, and what 4d N=2 SCFTs arise when compactifying said 6d SCFTs, with a non-simply-connected flavor group, on a torus with a non-trivial Stiefel--Whitney twist.
