A heterotic standard model with B - L symmetry and a stable proton

Evgeny Buchbinder, A. Constantin, A. Lukas

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    16 Citations (Scopus)


    We consider heterotic Calabi-Yau compactifications with S(U(4) × U(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. © 2014 The Author(s).
    Original languageEnglish
    Article number100
    Number of pages25
    JournalJournal of High Energy Physics
    Issue number6
    Publication statusPublished - 17 Jun 2014

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