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Four-Dimensional Yang–Mills Theory as a Deformation of Topological BF Theory

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  1. Article

    Open Access

    Defects, nested instantons and comet-shaped quivers

    We introduce and study a surface defect in four-dimensional gauge theories supporting nested instantons with respect to the parabolic reduction of the gauge group at the defect. This is engineered from a ...

    G. Bonelli, N. Fasola, A. Tanzini in Letters in Mathematical Physics (2021)

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  2. Article

    Open Access

    Real topological string amplitudes

    We discuss the physical superstring correlation functions in type I theory (or equivalently type II with orientifold) that compute real topological string amplitudes. We consider the correlator corresponding to h...

    K. S. Narain, N. Piazzalunga, A. Tanzini in Journal of High Energy Physics (2017)

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