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OBSERVABLE/HIDDEN SECTOR BROKEN SYMMETRY FOR SYMMETRIC BOUNDARY CONDITIONS

    https://doi.org/10.1142/S0217751X06031090Cited by:3 (Source: Crossref)

    A four-dimensional heterotic string model of free fermionic construction is presented wherein mirror symmetry breaking between observable and hidden sector gauge groups occurs in spite of mirror symmetry between observable and hidden sector worldsheet fermion boundary conditions. The differentiation is invoked by an asymmetry in GSO projections necessarily resulting from the symmetry of the free fermionic boundary conditions. In the specific examples shown, an expected nonchiral Pati–Salam mirror universe model is transformed into a chiral model with enhanced hidden sector gauge symmetry and reduced observable sector gauge symmetry: [SU(4)CSU(2)LSU(2)R]O ⊗ [SU(4)CSU(2)LSU(2)R]H, is necessarily transformed into a chiral [SU(4)CSU(2)L]O ⊗ [SO(10) ⊗ SU(2)R]H model because of an unavoidable asymmetry in GSO projections.

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