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The superconformal index of the (2,0) theory with defects

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String theory predicts the existence of a class of interacting superconformal field theories in six dimensions which arise on the world-volume of coincident M5 branes. There are important defect operators in these theories corresponding to intersecting M2 and M5 branes. I will explain how to compute the superconformal index in the presence of such defects using five-dimensional supersymmetric gauge theory and show that they are in one-to-one correspondence with the characters of irreducible representations of a class of chiral algebras.

This talk is part of the Quantum Fields and Strings Seminars series.

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