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- W2765931807 abstract "CERN-TH/2001-194 UCB-PTH-01/34 LBNL-48632 arXiv:hep-ph/0108161 v1 20 Aug 2001 Towards a Theory of Flavor from Orbifold GUTs Lawrence Hall 1,2 , John March-Russell 1,3 , Takemichi Okui 1,2 , and David Smith 1 Theory Group, Physics Division, LBNL, Berkeley, CA 94720, USA Physics Department, University of California, Berkeley, CA 94720, USA Theory Division, CERN, CH-1211 Geneva 23, Switzerland (August, 2001) Abstract We show that the recently constructed 5-dimensional supersymmetric S 1 /(Z 2 × Z 2 ) orb- ifold GUT models allow an appealing explanation of the observed hierarchical structure of the quark and lepton masses and mixing angles. Flavor hierarchies arise from the geometrical suppression of some couplings when fields propagate in different numbers of dimensions, or on different fixed branes. Restrictions arising from locality in the extra di- mension allow interesting texture zeroes to be easily generated. In addition the detailed nature of the SU(5)-breaking orbifold projections lead to simple theories where b − τ unification is maintained but similar disfavored SU(5) relations for the lighter genera- tions are naturally avoided. We find that simple 5d models based on S 1 /(Z 2 × Z 2 ) are strikingly successful in explaining many features of the masses and mixing angles of the 2nd and 3rd generation. Successful three generation models of flavor including neutrinos are constructed by generalizing the S 1 /(Z 2 × Z 2 ) model to six dimensions. Large angle neutrino mixing is elegantly accommodated. Novel features of these models include a simple m u = 0 configuration leading to a solution of the strong CP problem." @default.
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- W2765931807 date "2001-08-20" @default.
- W2765931807 modified "2023-09-27" @default.
- W2765931807 title "Towards a theory of Flavor from Orbifold GUTs - eScholarship" @default.
- W2765931807 hasPublicationYear "2001" @default.
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