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arXiv · 1404.2767

A Heterotic Standard Model with B-L Symmetry and a Stable Proton

Evgeny I. Buchbinder·Andrei Constantin·Andre Lukas
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Abstract

We consider heterotic Calabi-Yau compactifications with S(U(4)xU(1)) background gauge fields. These models lead to gauge groups with an additional U(1) factor which, under certain conditions, can combine with hypercharge to a B-L symmetry. The associated gauge boson is automatically super-massive and, hence, does not constitute a phenomenological problem. We illustrate this class of compactifications with a model based on the monad construction, which leads to a supersymmetric standard model with three families of quarks and leptons, one pair of Higgs doublets, three right-handed neutrinos and no exotics charged under the standard model group. The presence of the B-L symmetry means that the model is safe from proton decay induced by dimension four operators. Due to the presence of a special locus in moduli space where the bundle structure group is Abelian and the low-energy symmetry enhances we can also show the absence of dimension five proton-decay inducing operators.

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Evgeny I. Buchbinder, Andrei Constantin, Andre Lukas. 2014-04-10. A Heterotic Standard Model with B-L Symmetry and a Stable Proton. https://doi.org/10.1007/jhep06(2014)100

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