Karlstad University | Mathematical Institute

String Spectra and Effective Actions with Minimal Supersymmetry in the Type I Context

Igor Buchberger

(Karlstad University)

Abstract

I will discuss four-dimensional minimally supersymmetric toroidal orientifold models with D-branes and worldvolume flux. With flux but no orbifold projection, these models are well understood. They have been used extensively in various phenomenological contexts, and are T-dual to D-branes at angles. With orbifold, supersymmetry is reduced also in the closed string sector, and T-duality relations are not always straightforward. I will discuss work in progress on aspects of the one-loop string effective actions of these more general models.