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

H. Itoyama; Sota Nakajima

arxiv: 1905.10745 · v4 · pith:NY7FLXW6new · submitted 2019-05-26 · ✦ hep-th · hep-ph

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

H. Itoyama , Sota Nakajima This is my paper

classification ✦ hep-th hep-ph

keywords gaugesymmetryenhancedconstantcosmologicalexponentiallyheteroticinterpolating

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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.

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