Samhällsvetenskapliga fakulteten

Seminarium: 5D gauge theories and strings

  • Datum:
  • Plats: A73121
  • Föreläsare: Sibasish Banarjee (Bonn)
  • Kontaktperson: Fabrizio Nieri
  • Seminarium

Five-dimensional gauge theories preserving 8 supercharges possess a rich spectrum of BPS states. Compactified on a torus, these theories reduce to sigma-models whose target space gets instanton corrections from these BPS states and carries an isometric action of the torus modular group. I will present a joint work with Alexandrov and Longhi where we showed that this sigma model can be captured in a rigid limit of type II string theory compactified on a Calabi-Yau manifold. The rigid limit is induced by a certain local limit on the Calabi-Yau. I will also illustrate how the different instanton corrections on the gauge theory side, which thus far remained elusive, can be understood in the light of the recent progress made in studying the hypermultiplet moduli space of string theory.