On hypercharge flux and exotics in F-theory GUTs

Emilian Dudas, Eran Palti

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

We study SU(5) Grand Unified Theories within a local framework in F-theory with multiple extra U(1) symmetries arising from a small monodromy group. The use of hypercharge flux for doublet-triplet splitting implies massless exotics in the spectrum that are protected from obtaining a mass by the U(1) symmetries. We find that lifting the exotics by giving vacuum expectation values to some GUT singlets spontaneously breaks all the U(1) symmetries which implies that proton decay operators are induced. If we impose an additional R-parity symmetry by hand we find all the exotics can be lifted while proton decay operators are still forbidden. These models can retain the gauge coupling unification accuracy of the MSSM at 1-loop. For models where the generations are distributed across multiple curves we also present a motivation for the quark-lepton mass splittings at the GUT scale based on a Froggatt-Nielsen approach to flavour.

Original languageEnglish
Article number13
JournalJournal of High Energy Physics
Volume2010
Issue number9
DOIs
StatePublished - 1 Jan 2010
Externally publishedYes

Keywords

  • F-theory
  • GUT

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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