Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-12-10
Phys.Lett. B531 (2002) 245-254
Physics
High Energy Physics
High Energy Physics - Phenomenology
16pages, 1figure. References added and version to appear in Phys. Lett. B
Scientific paper
10.1016/S0370-2693(02)01503-4
We suggest a simple supersymmetric SO(10) grand unified theory in 6 dimensions which produces the suitable fermion mass hierarchies. The 5th and 6th dimensional coordinates are compactified on a $T^2/Z_2$ orbifold. The gauge and Higgs fields propagate in 6 dimensions while ordinal chiral matter fields are localized in 4 dimensions. The orbifolding and boundary conditions realize the gauge symmetry reduction, $SU(3)_C\times SU(2)_L \times U(1)_Y \times U(1)_X$, and the triplet-doublet mass splitting. We introduce extra three sets of vector-like heavy fields: two sets propagate in 6 dimensions and chiral fields which couple to them are defined as the 1st generation, and one set propagates in 5 dimensions and chiral fields which couple to them are defined as the 2nd generation. The suitable fermion mass hierarchies are generated by integrating out these vector-like heavy fields.
Haba Naoyuki
Kondo Toshiaki
Shimizu Yasuaki
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