93 citations · 263 across the 16 of their papers we have counts for
16 papers
Surface operators, dual quivers and contours
S. K. Ashok, S. Ballav, M. Billo' +5
We study half-BPS surface operators in four dimensional N=2 SU(N) gauge theories, and analyze their low-energy effective action on the four dimensional Coulomb branch using equivar…
Surface operators in 5d gauge theories and duality relations
S. K. Ashok, M. Billo, E. Dell'Aquila +4
We study half-BPS surface operators in 5d N=1 gauge theories compactified on a circle. Using localization methods and the twisted chiral ring relations of coupled 3d/5d quiver gaug…
Surface operators, chiral rings, and localization in N=2 gauge theories
S. K. Ashok, M. Billo, E. Dell'Aquila +4
We study half-BPS surface operators in supersymmetric gauge theories in four and five dimensions following two different approaches. In the first approach we analyze the chiral rin…
Modular and duality properties of surface operators in N=2* gauge theories
S. K. Ashok, M. Billo, E. Dell'Aquila +3
We calculate the instanton partition function of the four-dimensional N=2* SU(N) gauge theory in the presence of a generic surface operator, using equivariant localization. By anal…
Chiral observables and S-duality in N = 2* U(N) gauge theories
S. K. Ashok, M. Billo, E. Dell'Aquila +4
We study N = 2* theories with gauge group U(N) and use equivariant localization to calculate the quantum expectation values of the simplest chiral ring elements. These are expresse…
S-duality, triangle groups and modular anomalies in N=2 SQCD
S. K. Ashok, E. Dell'Aquila, A. Lerda +1
We study N = 2 superconformal theories with gauge group SU(N) and 2N fundamental flavours in a locus of the Coulomb branch with a Z_N symmetry. In this special vacuum, we calculate…