Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-08-08
JHEP 1101:045,2011
Physics
High Energy Physics
High Energy Physics - Theory
40 pages. v2: minor changes and clarifications
Scientific paper
10.1007/JHEP01(2011)045
Recently Alday and Tachikawa proposed a relation between conformal blocks in a two-dimensional theory with affine sl(2) symmetry and instanton partition functions in four-dimensional conformal N=2 SU(2) quiver gauge theories in the presence of a certain surface operator. In this paper we extend this proposal to a relation between conformal blocks in theories with affine sl(N) symmetry and instanton partition functions in conformal N=2 SU(N) quiver gauge theories in the presence of a surface operator. We also discuss the extension to non-conformal N=2 SU(N) theories.
Kozcaz Can
Pasquetti Sara
Passerini Filippo
Wyllard Niclas
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