Metastable Quivers in String Compactifications
Duiliu-Emanuel Diaconescu, Ron Donagi, Bogdan Florea
TL;DR
This paper presents a string-theoretic mechanism for dynamical supersymmetry breaking by embedding quiver gauge theories, engineered from fractional branes on del Pezzo singularities, into compact Calabi–Yau backgrounds via mirror symmetry. By mapping to IIA via homological mirror symmetry, the authors stabilize closed-string moduli with fluxes in a controlled large-volume regime, while the low-energy open-string dynamics yields SUSY-breaking quivers. They show the F-flatness conditions generically intersect the quiver locus in codimension two, ensuring metastable SUSY-breaking vacua without excessive fine-tuning. Two explicit compact examples—the elliptic fibration and a quintic-based model—demonstrate the viability of the construction and provide concrete data for moduli stabilization and flux choices, highlighting potential compatibility with MSSM realizations through fractional branes.
Abstract
We propose a scenario for dynamical supersymmetry breaking in string compactifications based on geometric engineering of quiver gauge theories. In particular we show that the runaway behavior of fractional branes at del Pezzo singularities can be stabilized by a flux superpotential in compact models. Our construction relies on homological mirror symmetry for orientifolds.