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A note on theta dependence
Frank Ferrari
The dependence on the topological theta angle term in quantum field theory is usually discussed in the context of instanton calculus. There the observables are 2 pi periodic, analy…
Exact amplitudes in four dimensional non-critical string theories
Frank Ferrari
The large Nc expansion of N=2 supersymmetric Yang-Mills theory with gauge group SU(Nc) has recently been shown to break down at singularities on the moduli space. We conjecture tha…
The large Nc limit of N=2 super Yang-Mills, fractional instantons and infrared divergences
Frank Ferrari
We investigate the large Nc limit of pure N=2 supersymmetric gauge theory with gauge group SU(Nc) by using the exact low energy effective action. Typical one-complex dimensional se…
A model for gauge theories with Higgs fields
Frank Ferrari
We discuss in details a simple, purely bosonic, quantum field theory belonging to larger class of models with the following properties: a) They are asymptotically free, with a dyna…