Abstract
We systematically develop the formalism necessary for ensuring that boundary conditions of flavon fields in extra dimensions are consistent with heterotic string theory. Having developed a set of consistency conditions on the boundary conditions, we explore a series of examples of orbifolds in various dimensions to see which ones can satisfy them. In addition we impose the further phenomenological requirements of having non-trivial flavon vacuum alignments and also of having quarks and leptons located appropriately in extra dimensions. The minimal successful case seems to be a 10d theory with a SU(3)fl gauged flavour symmetry, where the six-dimensional torus is compactified on a 𝕋6/∆(54) orbifold. We construct a realistic SU(5) grand unified theory along these lines, leading to tribimaximal-reactor lepton mixing, which we show to be consistent with current neutrino data.
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de Anda, F.J., King, S.F., Perdomo, E. et al. Flavon alignments from orbifolding: SU(5) × SU(3) model with 𝕋6/∆(54). J. High Energ. Phys. 2019, 55 (2019). https://doi.org/10.1007/JHEP12(2019)055
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DOI: https://doi.org/10.1007/JHEP12(2019)055