Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-06-28
Mod.Phys.Lett. A11 (1996) 2547-2554
Physics
High Energy Physics
High Energy Physics - Phenomenology
substantially rewritten to incorporate more results; has notation changes and new references
Scientific paper
10.1142/S0217732396002551
In this letter, we introduce a new approach to formulate the family structure of the standard model. Trying to mimic the highly contrained representation structure of the standard model while extending the symmetry, we propose a $SU(4)\otimes SU(3)\otimes SU(2)\otimes U(1)$ symmetry with a SM-like chiral spectra basically "derived" from the gauge anomaly constraints. Embedding the SM leads to $SU(4)_A\otimes SU(3)_C\otimes SU(2)_L\otimes U(1)_X$ models, which upon the $SU(4)_A\otimes U(1)_X \longrightarrow U(1)_Y$ symmetry breaking, gives the three families naturally as a result. A specific model obtained from the approach is illustrated. The model, or others from our approach, holds promise of a very interesting phenomenology. We sketch some of the results here. An interesting possiblity of supersymmetrizing the model with the EW-Higgses already in the spectrum is noted. A comparison with other approaches is also discussed.
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