23.01.2020 (Thursday)

Surface defects in 4d superconformal theories and chiral algebras

Regular Seminar Madalena Lemos (CERN)

14:00 QMW
room G O Jones 610

We study symmetry constraints on BPS surface defects in four-dimensional superconformal field theories, showing how supersymmetry imposes relations on anomaly coefficients. Turning to dynamics, we analyze a protected subsector of N=(2,2) surface defects that is captured by a two-dimensional chiral algebra. We discuss how to compute observables of interacting defects from the chiral algebra, including the aforementioned anomaly coefficients.