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Pati-Salam model

The Pati-Salam model is a GUT theory which states that the gauge group is either

SU(4)\times SU(2)_L\times SU(2)_R

[SU(4)\times SU(2)_L\times SU(2)_R]/\mathbb{Z}_2

and the fermions form three families, each consisting of the representations

(4,2,1)

and

(\bar 4,1,2)

. This includes the right handed neutrino, which is now known to exist. See neutrino oscillations. There is also a (4,1,2) and/or a

scalar field called the Higgs field which acquires a VEV. This results in a spontaneous symmetry breaking from

or from

and also,

and

. Of course, calling the representations things like

and (6,1,1) is purely a physicist's convention, not a mathematician's convention, where representations are either labelled by Young tableaux or Dynkin diagrams with numbers on their vertices, but still, it is standard among GUT theorists.

Since the homotopy group , this model predicts monopoles. See 't Hooft-Polyakov monopole.

This model was invented by Jogesh Pati and Abdus Salam.

Referenced By

Grand Unified Theory | Grand unification | Grand unification theories | Grand unification theory | Grand unified theories

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Pati-Salam model".