Open string models with Scherk-Schwarz SUSY breaking

TL;DR

This paper explores open string models employing Scherk-Schwarz supersymmetry breaking, constructing new models with D-branes and analyzing their quantum stability from a geometric perspective.

Contribution

It introduces a new Z_3×Z_3' open string model with D9-branes and rederives a known Z_6'×Z_2' model involving multiple D-brane types, emphasizing geometric insights.

Findings

Construction of a novel Z_3×Z_3' model with D9-branes

Geometric rederivation of the Z_6'×Z_2' model with D9, D5, and anti-D5 branes

Discussion of quantum instability in these models

Abstract

We apply the well-known Scherk-Schwarz supersymmetry breaking mechanism in an open string context. We construct a new Z_3\times Z_3^\prime model, containing only D9-branes, and rederive from a more geometric perspective the known Z_6^\prime\times Z_2^\prime model, containing D9, D5 and \bar D 5 branes. We show recent results about the study of quantum instability of these models.