On Gauge Dynamics and SUSY Breaking in Orientiworld

TL;DR

This paper investigates non-perturbative gauge dynamics and supersymmetry breaking in orientiworld models with D3-branes on orbifolds, revealing diverse supersymmetric and supersymmetry-breaking behaviors.

Contribution

It provides a detailed analysis of gauge dynamics in orientiworld models with various orbifold groups, highlighting new mechanisms for supersymmetry preservation and breaking.

Findings

Identification of models with rich supersymmetric dynamics

Discovery of models exhibiting dynamical supersymmetry breaking

Analysis of the role of orientifold 3-planes in gauge behavior

Abstract

In the Orientiworld framework the Standard Model fields are localized on D3-branes sitting on top of an orientifold 3-plane. The transverse 6-dimensional space is a non-compact orbifold (or a more general conifold). The 4-dimensional gravity on D3-branes is reproduced due to the 4-dimensional Einstein-Hilbert term induced at the quantum level. The orientifold 3-plane plays a crucial role, in particular, without it the D3-brane world-volume theories would be conformal due to the tadpole cancellation. We study non-perturbative gauge dynamics in various N=1 supersymmetric orientiworld models based on the Z_3 as well as Z_5 and Z_7 orbifold groups. Our discussions illustrate that there is a rich variety of supersymmetry preserving dynamics in some of these models. On the other hand, we also find some models with dynamical supersymmetry breaking.