Speaker
Yifan Wang
(New York University)
Description
We study properties of point-like impurities preserving flavor symmetry and supersymmetry in four-dimensional N=2 field theories. At large distances, such impurities are described by half-BPS superconformal line defects. By working in the AdS2*S2 conformal frame, we develop a novel, simpler, way of deriving the superconformal Ward identities relating the various two-point functions of flavor current multiplet operators in the presence of the defect. We use these relations to simplify a certain integrated two-point function of flavor current multiplet operators, which is accessible by exact methods such as supersymmetric localization and provides useful input for further bootstrap studies.
