Flipped SU(5) - The Model

The Model

The Flipped SU(5) model states that the gauge group is:

/

Fermions form three families, each consisting of the representations

for the lepton doublet, L, and the up quarks ;
for the quark doublet,Q, the down quark, and the right-handed neutrino, N;
for the charged leptons,.

This assignment includes three right-handed neutrinos, which have never been observed, but are often postulated to explain the lightness of the observed neutrinos and neutrino oscillations. There is also a and/or called the Higgs fields which acquire a VEV, yielding the spontaneous symmetry breaking

to

The SU(5) representations transform under this subgroup as the reducible representation as follows:

(uc and l)
(q, dc and νc)
(ec)
.

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