Exponentially suppressed cosmological constant with enhanced gauge symmetry in heterotic interpolating models

Abstract

A few nine-dimensional interpolating models with two parameters are constructed and the massless spectra are studied by considering compactification of heterotic strings on a twisted circle with Wilson line. It is found that there are some conditions between radius R and Wilson line A under which the gauge symmetry is enhanced. In particular, when the gauge symmetry is enhanced to SO(18) \times SO(14), the cosmological constant is exponentially suppressed. We also construct a non-supersymmetric string model which is tachyon-free in all regions of moduli space and whose gauge symmetry involves E_8.

arXiv commentFinal version to appear in PTEP

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• Geometry of orientifold vacua and supersymmetry breaking
• Type 0 ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds and Misaligned Supersymmetry
• Non-SUSY Heterotic String Vacua of Gepner Models with Vanishing Cosmological Constant
• Higgs-portal dark matter from non-supersymmetric strings
• Towards Classification of $\mathcal{N}=1$ and $\mathcal{N}=0$ Flipped $SU(5)$ Asymmetric ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds
• Notes on Vanishing Cosmological Constant without Bose-Fermi Cancellation
• Stringy Threshold Corrections in D-brane Systems