Setting the Stage for a Non-Supersymmetric UV-Complete String Phenomenology

Abstract

In this talk, I discuss our recent work concerning the construction of non-supersymmetric heterotic string models which have exponentially suppressed dilaton tadpoles and cosmological constants, and thus greatly enhanced stability properties. The existence of such models opens the door to non-supersymmetric string model-building, and I discuss how semi-realistic string models resembling the Standard Model or any of its unified variants may be constructed within this framework. These models maintain modular invariance and exhibit a misaligned supersymmetry which ensures UV finiteness, even without spacetime supersymmetry. I also discuss the potential implications for phenomenology.

Comments: 22 pages, 6 figures, 2 tables. Talk based on arXiv:1502.03087 and delivered by S.A. at Planck 2015: The 18th International Conference from the Planck Scale to the Electroweak Scale, Ioannina, Greece, May 2015