String Phenomenology From a Worldsheet Perspective

Abstract

I argue that the ten dimensional non--supersymmetric tachyonic superstrings may serve as good starting points for the construction of viable phenomenological vacua. Thus, enlarging the space of possible solutions that may address some of the outstanding problems in string phenomenology. A tachyon free six generation Standard--like Model is presented, which can be regarded as an orbifold of the $SO(16)\times E_8$ heterotic--string in ten dimensions. I propose that any $(2,0)$ heterotic--string in four dimensions can be connected to a $(2,2)$ one via an orbifold or by interpolations and provide some evidence for this conjecture. It suggests that any Effective Field Theory (EFT) model that cannot be connected to a $(2,2)$ theory is necessarily in the swampland, and will simplify the analysis of the moduli spaces of $(2,0)$ string compactifications.

19 pages. Standard LaTex. Published version. Minor typos

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Cited by in corpus (15)

• Stability, enhanced gauge symmetry and suppressed cosmological constant in 9D heterotic interpolating models
• Towards the Classification of Tachyon-Free Models From Tachyonic Ten-Dimensional Heterotic String Vacua
• Classification of Non-Supersymmetric Pati-Salam Heterotic String Models
• Supersymmetry Breaking and Stability in String Vacua: brane dynamics, bubbles and the swampland
• Stable Three Generation Standard--like Model From a Tachyonic Ten Dimensional Heterotic--String Vacuum
• Stable Vacua for Tachyonic Strings
• Marginal deformations of heterotic interpolating models and exponential suppression of the cosmological constant
• Type $\bar{0}$ Heterotic String Orbifolds
• Satisfiability Modulo Theories and Chiral Heterotic String Vacua with Positive Cosmological Constant
• Target Space Duality of Non-Supersymmetric String Theory
• Type 0 ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds and Misaligned Supersymmetry
• Towards Classification of $\mathcal{N}=1$ and $\mathcal{N}=0$ Flipped $SU(5)$ Asymmetric ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds
• Vacuum Energy in Non-Supersymmetric Quasi-Realistic Heterotic-String Vacua with Fixed Moduli
• Spinor-Vector Duality and the Swampland
• Spinor-Vector Duality and Mirror Symmetry