Type IIB orbifolds with D5-branes and their string duals

TL;DR

This paper explores specific Type IIB orbifold models with D5-branes, analyzing their supersymmetry properties and dualities with heterotic and Type I theories to gain insights into their non-perturbative behavior.

Contribution

It introduces a class of Z2 freely acting orbifolds with D5-branes and studies their dualities, providing new understanding of their non-perturbative regimes.

Findings

Establishment of duality relations with heterotic and Type I models.

Analysis of N=2 supersymmetry from N=4 breaking.

Insights into non-perturbative aspects of these orbifold systems.

Abstract

We consider Z2, freely acting orbifolds of the type IIB string with 16 parallel D5-branes. When the string is compactified on T2 X T4 and the D5-branes are wrapped on T2, these systems possess N=2 supersymmetry, originating from the spontaneous, partial breaking of N=4. Extended supersymmetry allows us to investigate the duality with certain heterotic and type I constructions, and to obtain informations about their non-perturbative regime.