Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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$\cN =2^*$ (non-)Abelian theory in the $\Omega$-background from String theory

Jul 8, 2017, 11:50 AM
Room Welles (Palazzo del Casinò)

Room Welles

Palazzo del Casinò

Parallel Talk Quantum Field and String Theory QFT and string theory


Dr Marine Samsonyan (CERN)


We present a D-brane realisation of the (non-)Abelian $\mathscr{N}=2^*$ theory. For $\Omega$ deformation we compute suitable topological amplitudes in this setup. These amplitudes are expressed as a double series expansion. The coefficients determine couplings of higher-dimensional operators in the effective supergravity action that involve powers of the anti-self-dual $\mathscr{N}=2$ chiral Weyl superfield and of self-dual gauge field strengths superpartners of the D5-brane coupling modulus. In the field theory limit, as it is expected, the result reproduces the Nekrasov partition function in the two-parameter $\Omega$-background.

Primary authors

Dr Marine Samsonyan (CERN) Prof. Carlo Angelantonj (University of Torino) Prof. Ignatios Antoniadis (LPTHE, CNRS UMR 7589, Albert Einstein Center for Fundamental Physics, ITP)

Presentation materials