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(30.11.) 2D CFT for class Sk theories

Elli Pomoni (Desy)

30.11.2017 at 16:15 

We will introduce a large class of N=1 superconformal theories, called Sk, which is obtained from Gaiotto’s N=2 class S via orbifolding. We will study the Coulomb branch of the theories in the class by constructing and analyzing their spectral curves. Using our experience from the N=2 AGT correspondence we will search for a 2D/4D relations (AGTk) for the N=1 theories of class Sk. From the curves we will identify the 2D CFT
symmetry algebra and its representations, namely the conformal blocks of the Virasoro/W- algebra, that underlie the 2D theory and reproduce the Seiberg-Witten curves of the N = 1 gauge theories. We find that the blocks corresponding to the SU(N) Sk gauge theories involve fields in representations of the W_{kN} algebra. These conformal blocks give a prediction for the instanton partition functions of the 4D N = 1 SCFTs of class Sk.

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