منابع مشابه
Unification in Quasi–Realistic Orbifold String GUTs
E6 grand unification combines the Standard Model matter and Higgs states in the single 27 representation. I discuss how the E6 structure underlies the quasi–realistic free fermion heterotic–string models. E6 → SO(10) × U(1) breaking is obtained by a GSO phase in the N = 1 partition function. The equivalence of this symmetry breaking phase with a particular choice of a boundary condition basis v...
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E6 grand unification combines the Standard Model matter and Higgs states in the single 27 representation. I discuss how the E6 structure underlies the quasi–realistic free fermion heterotic–string models. E6 → SO(10) × U(1) breaking is obtained by a GSO phase in the N = 1 partition function. The equivalence of this symmetry breaking phase with a particular choice of a boundary condition basis v...
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Three lectures on supersymmetric GUTs given at PITP 2008 “Strings and Phenomenology,” July 14 25, 2008.
متن کاملMagnitude of R-parity violation in String Inspired GUTs
The nature of R-parity violating interactions in two classes of string inspired supersymmetric grand unified theories (SISUSY GUT), based on the gauge groups SO(10) (and its subgroup SU(2)L × SU(2)R × SU(4)c ≡ G224) as well as [SU(3)] , are discussed and their strengths are related to the ratio of symmetry breaking scales present in the model. We first argue that for the R-parity violating coup...
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We consider the methods by which higher-level and non-simply laced gauge symmetries can be realized in heterotic string theory. We show that all such realizations have a common underlying feature, namely a dimensional truncation of the charge lattice, and we identify such dimensional truncations with certain irregular embeddings of higher-level and non-simply laced gauge groups within level-one...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1995
ISSN: 0550-3213
DOI: 10.1016/0550-3213(95)00282-w