D-instantons and Matrix Models

P. Vanhove (1)

1 DAMTP - Department of Applied Mathematics and Theoretical Physics

We discuss the Matrix Model aspect of configurations saturating a fixed number of fermionic zero modes. This number is independent of the rank of the gauge group and the instanton number. This will allow us to define a large-$N_c$ limit of the embeddeding of $K$ D-instantons in the Matrix Model and make contact with the leading term (the measure factor) of the supergravity computations of D-instanton effects. We show that the connection between these two approaches is done through the Abelian modes of the Matrix variables.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

P. Vanhove. D-instantons and Matrix Models. 1999. ⟨hal-00003615⟩