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Comments on scaling limits of 4d N=2 theories
Davide Gaiotto, Nathan Seiberg, Yuji Tachikawa
We revisit the study of the maximally singular point in the Coulomb branch of 4d N=2 SU(N) gauge theory with N_f=2n flavors for N_f<2N. When n >= 2, we find that the low-energy phy…
Bootstrapping Null Polygon Wilson Loops
Davide Gaiotto, Juan Maldacena, Amit Sever +1
We derive the two loop expressions for polygonal Wilson loops by starting from the one loop expressions and applying an operator product expansion. We do this for polygonal Wilson…
An Operator Product Expansion for Polygonal null Wilson Loops
Luis F. Alday, Davide Gaiotto, Juan Maldacena +2
We consider polygonal Wilson loops with null edges in conformal gauge theories. We derive an OPE-like expansion when several successive lines of the polygon are becoming aligned. T…
Framed BPS States
Davide Gaiotto, Gregory W. Moore, Andrew Neitzke
We consider a class of line operators in d=4, N=2 supersymmetric field theories which leave four supersymmetries unbroken. Such line operators support a new class of BPS states whi…
The Virtue of Defects in 4D Gauge Theories and 2D CFTs
Nadav Drukker, Davide Gaiotto, Jaume Gomis
We advance a correspondence between the topological defect operators in Liouville and Toda conformal field theories - which we construct - and loop operators and domain wall operat…