Three-Family SU(5) Grand Unification in String Theory
نویسندگان
چکیده
We present two 3-family SU(5) grand unified models in the heterotic string theory. One model has 3 chiral families and 9 pairs of 5+ 5 Higgs fields, and an asymptotically-free SU(2) ⊗ SU(2) hidden sector, where the two SU(2)s have different matter contents. The other model has 6 left-handed and 3 righthanded 10s, 12 left-handed and 9 right-handed 5s, and an asymptotically-free SU(3) hidden sector. At the string scale, the gauge couplings g of the hidden sectors are three times as big as that of SU(5). In addition, both models have
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