Publications (33)
S-duality and the prepotential in N=2* theories (I): the ADE algebras
M. Billo, M. Frau, F. Fucito +2
The prepotential of N=2* supersymmetric theories with unitary gauge groups in an Omega-background satisfies a modular anomaly equation that can be recursively solved order by order…
Correlators in non-conformal gauge theories from localization
M. Billo, L. Griguolo, A. Lerda +1
We study two-point correlation functions of chiral/anti-chiral operators in SU(N) gauge theories with massless hyper-multiplets in a representation as…
Universal behaviour of interfaces in 2d and dimensional reduction of Nambu-Goto strings
M. Billo, M. Caselle, L. Ferro
We propose a simple effective model for the description of interfaces in 2d statistical models, based on the first-order treatment of an action corresponding to the length of the i…
S-duality and the prepotential in N=2* theories (II): the non-simply laced algebras
M. Billo, M. Frau, F. Fucito +2
We derive a modular anomaly equation satisfied by the prepotential of the N=2* supersymmetric theories with non-simply laced gauge algebras, including the classical B and C infinit…
Ramond-Ramond (boundary) states
M. Billo, R. Russo
The description of D-branes as boundary states for type II string theories (in the covariant formulation) requires particular care in the R-R sector. Also the vertices for R-R pote…
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…