Grand Unification of Flavor by Orbifold Twisting Z2 and Z2 × Z ′ 2
نویسنده
چکیده
Gauge coupling unification–The simplest(rank 4) GUT SU(5) classifies the 15 chiral fields in two SU(5) representations, 10 plus 5. Of course, one can introduce SU(5) singlet(s) which must be electrically neutral, and guarantees the GUT value of the weak mixing angle 3/8. The next simplest GUT is a rank 5 group SO(10). Its rank 5 subgroup SU(5)× U(1) can be a GUT group(the so-called flipped-SU(5)) with the 16 chiral fields assigned to 10, 5, and 1, with 1 carrying one unit of electric charge, which are represented as
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