Gauged baryon and lepton numbers
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields1989Vol. 40(7), pp. 2487–2489
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Abstract
A possible extension of the standard model can be defined by gauging the global baryon- and lepton-number U(1) symmetries. Gauging baryon and lepton numbers provides a natural framework for the seesaw mechanism in the lepton sector, and the Peccei-Quinn mechanism in the quark sector. Another consequence of this extension is that the usual three generations of fermions are not anomaly-free. However, we consider a wider framework involving the existence of generations with exotic $\mathrm{SU}{(2)}_{L}\ensuremath{\bigotimes}\mathrm{U}{(1)}_{Y}$ quantum numbers. This allows us to "derive" a spectrum of fermions which contain the known quarks and leptons.
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